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How to drive a diesel engine? What kind of riding does he like?

martinb33 148132 29
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How should I drive a diesel engine, and at what RPM should I shift gears to keep it economical and durable?

Drive a diesel gently when it is cold, do not floor it, and keep it below about 2000 rpm; once warm, use the engine in its working range and shift so the revs after the shift do not fall below the turbo’s effective band. [#12488392] [#8595516] [#8656602] For a turbo diesel, many replies point to roughly 1900–2700 rpm as the most sensible range, with shifts often around 2000–3000 rpm depending on the car and how hard you are accelerating. [#8654787] [#8595132] Do not lug the engine in high gear at very low revs, especially around 1200–1500 rpm, because that overloads the engine and is bad for the bottom end and bearings. [#8595132] [#8595228] [#8692023] If you want to clear soot and keep the turbo working properly, it is worth occasionally revving it higher once it is warmed up, and after a hard run let the turbo slow/cool before shutting the engine off. [#8595206] [#12488392] [#12488392]
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  • #1 8273285
    martinb33
    Level 13  
    Posts: 122
    Rate: 3
    Hello colleagues.
    I am not an experienced driver and in my life I only had a short pleasure of driving a diesel once, unfortunately I did not think about the characteristics of this drive!
    Now for about 2 months I have been the owner of an "abscess" 1.9 TDI myself
    and I would like to dispel my and maybe other doubts once and for all:
    How do you drive a diesel engine?
    Does he like high revolutions or low revolutions, at which revolutions he works most culturally, smokes the least and does not get tired?
    At what revolutions is it best to change gears?
    Certainly, this type of information will help me extend the life of my diesel, and maybe also help someone else.
    greetings
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  • #2 8273645
    bocian21a
    Level 10  
    Posts: 34
    Hello friend.
    There are different opinions about diesel driving. If you want to drive economically, you shouldn't spin it at high revs. The limit is the moment when the turbine starts to work louder and what goes with it you start to feel a surge of power. So this is probably the best time to change gear, but you have to feel it because each car is different. And if you want to feel the power and acceleration of your car, change the gear at a higher revs and you will immediately feel the surge of power and hear the turbine.
    Remember not to shoot it too high in winter, up to 2,000 higher, only when it warms up.

    In my opinion, this is the best way to drive a diesel engine :)

    PS What kind of car is it?
  • #3 8273828
    martinb33
    Level 13  
    Posts: 122
    Rate: 3
    PS What kind of car is it? [/ Quote]

    Seat Leon 1.9 TDI 90km 2000
    I have such a habit that I turn it to about 2,000 revolutions and I try to drive as well, then the engine works quietly and culturally, but I don't know what is good for a diesel! :|
  • #4 8273973
    excray
    Level 41  
    Posts: 5498
    Help: 739
    Rate: 655
    It depends on what car. I am turning the Ceed to 2500 and just changing gear but I drive rather dynamically. My average is 5.5 / 100 but I drive a lot on long distances.
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  • #5 8274393
    kamil907
    Level 28  
    Posts: 1126
    Help: 66
    Rate: 160
    Unfortunately, I have an ordinary diesel without turbo, so I still have to drive with my right foot in the floor to get it somehow, but thanks to this, people rarely overtake me, despite the low power. So far, literally nothing has happened to the engine for three years, it does not take any oil at all, and my fuel consumption is at the level of 6l. Of course, I do not recommend you to drive like this because you will quickly finish the turbine and then the engine. VW engines are not as durable as those older Peugeot units.
  • #6 8274518
    Mihas66
    Level 22  
    Posts: 594
    Help: 28
    Rate: 92
    Naturally aspirated diesels or turbo on an ordinary WG turbine, we shoot as we like, i.e. even up to 1500 rpm, but from time to time it should be reworked so that the soot from the exhaust flew out ... driving and you will have to clean it ... Therefore, to sum up, each engine should be dragged to sections at least every 10km for health, because the unused organ disappears; p As a curiosity, I can say that in my astra 1.7dtl I drove my grandfather for a long time to burn as little as possible, but then I had 30km section of which 5km around the city and non-stop shoes to the floor and catching 170km / h and the effect was that the soot in the exhaust began to burn out and a beam of sparks flew from the exhaust pipe so that it looked like the car was burning - people's faces must have been cool, like I was ahead of them ...
  • #7 8274627
    bixmixer
    Level 14  
    Posts: 78
    Help: 8
    Rate: 34
    TDI is, of course, after ignition, a moment for the oil to reach all components, then we move and gently with the gas while the engine is cold and when it warms up, the gas is fully available according to the preferences and needs. Diesels like longer distances to keep the engine warmed up. Before extinguishing, let the turbine slow down for a while, and if after a long route and a very turbo hot moment, extend the moment so that the oil cools the turbine because it is very hot on the exhaust manifold and after it is turned off it would fry

    Added after 45 [minutes]:

    I will add that your TDI-k does not have a diesel particulate filter, so it is not so sensitive to underheating. As for the revolutions, when you drive slowly around 1500-2000 per gear change, it is OK to feel it after the engine is running. I have the same engine in VW Bora
  • #8 8284647
    martinb33
    Level 13  
    Posts: 122
    Rate: 3
    So I should also "switch" it to 4,000 rpm every 10-20km?
    My heart aches when he "howls" at high speed; D
  • #9 8595132
    boe666
    Level 12  
    Posts: 76
    Help: 2
    Rate: 30
    see engine characteristics. If the engine is warm, shift to higher gears when you reach the revolutions where it still has power (about 3000), and reduce when you go below 1200 revolutions. and that's it. 1200-3200 is a range that is different for each car.
  • #10 8595206
    ogur3k
    Level 33  
    Posts: 1895
    Help: 170
    Rate: 158
    I support everyone who spoke, I was tired of a few diesels :) how cold it is gently with the gas, how warm you can eat at will. If you are eco-minded, remember not to bother him with too low revolutions, apparently the shells do not like it very much and the pistons are getting nuts ;-)
    overtaking, climbing uphill proposes to reduce and not throw the poor thing from 1500 revolutions. Sometimes it is worth chasing spiders out of the pipe, as it is called in my area :) in fact, this applies to every car, be it a pf 126p or a mercedes 'barrel' w123 with diesel.
  • #11 8595228
    Anonymous
    Anonymous  
  • #12 8595254
    ogur3k
    Level 33  
    Posts: 1895
    Help: 170
    Rate: 158
    In fact, I described the same thing ...
    If you have a fixed route, e.g. to work, you will work out the economy on this route and no one will tell you to do anyway :) a little trial, counting your fuel consumption and you will be the master of your car :)
    I drove under the supervision of the car owner, everything according to his guidelines and still the car burned half a liter more than the owner :)
  • #13 8595516
    skorpion1272
    Level 18  
    Posts: 378
    Help: 10
    Rate: 101
    It is true that you have to "drive" into each car, everyone is different and you cannot compare it with others. Still, the key is to handle the gas delicately and sensibly. When accelerating, it is better to gently add gas than to push it to the stop - it will have a positive effect on the durability of the engine, but will also reduce fuel consumption.

    ogur3k wrote:
    how cold it is gently with the gas, how warm you can eat at will.

    Dude, the engine should never, as you call it, "puff as much as you want," even when it's warm. Sooner or later, it will have consequences anyway, and it's not nice.
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  • #14 8595623
    ogur3k
    Level 33  
    Posts: 1895
    Help: 170
    Rate: 158
    In theory, when should an engine die after failing? I did 70kkm on my own, as they say, with gas in the floor, often a gear change before the section, currently on the 230kkm alarm clock from the very beginning on gas. Engine condition? It never happened that it did not fire, it never caused the slightest problem. At 15kkm, it takes about 700ml of oil. Full synthetic. It's a healthy engine for me. The cup will not knock, the valve will not tap. Just the base: don't press against the floor like cold :) the scream will start soon: "Such a course and synthetic ?! It should be mineral a long time ago!" if someone proves it to me, i'm sending a six pack of weapons :) for adults, of course :)
  • #15 8595778
    Anonymous
    Anonymous  
  • #16 8595791
    ogur3k
    Level 33  
    Posts: 1895
    Help: 170
    Rate: 158
    I think that the author of the topic got the answer to the questions that haunt him, if not, let's discuss further :)
    I suspect that since he asks about driving style, he really cares about his car and wants the best for him :) I do not need to mention the oil, oil filter, air and fuel filter, I can suggest replacing the coolant and brake fluid, in particular, the cost is not high and this is the absolute basis for safety. Especially when ABS is doing!
    Either my car is a miracle or the little Japanese hands are capable. Mazda 626 1.8l DOHC 16V 90KM with sequence from birth. Cut off at ~ 6750, who of you recently chased the spiders away? ;-) It is very possible that a European / Korean / American would die while driving ...
    No more melting, maybe the mod won't strangle me.
  • #17 8617616
    ejdiaj
    Level 11  
    Posts: 6
    Rate: 3
    I drove a Mazda 323F DITD 90KM, now Premacy DITD 101KM, I move on the roads at a speed of 80-110 km / h, I change gears at about 2000-2200 rpm (the turbine starts to limp at about 2000 rpm) and I must admit that it is quite enough for smooth movement. Fuel consumption is also satisfactory for the Mazda 323F 4.7 l / 100 km and for the Mazda Premacy 5.44 l / 100 km, and the truth is that you have to feel every car yourself.
  • #18 8654787
    burza11
    Level 13  
    Posts: 112
    Rate: 28
    when it comes to economy, the fact is lower revs and the highest gear for common sense, but think about what the turbine comes to life when the auto mule goes to revolutions, it starts to work properly to ~ 2k rpm, the engine has insufficient air flow, the exhaust gases have much greater temperature and the turbine is boiling, the turbodiesel engine should operate in the RPM range identical to the RPM range of the correct operation of the turbine, i.e. around 1900 to 2700 rpm, of course, it depends on the car.
    I will give an example, driving an Iveco Daily in Eu, mulching it for a longer time up below the TS temp operating range, the coolant grows quickly, also holding it up in the correct range (when the turbo is blowing) the temperature is unchanged, often in trucks on the tachometer there is a field marked in green and this is the range of maximum turbo performance, according to the manufacturers, driving in this RPM range is the most economical, efficient and the motor lasts longer, they do not suck it out of their finger ...
  • #19 8656602
    skorpion1272
    Level 18  
    Posts: 378
    Help: 10
    Rate: 101
    I agree with the previous speaker, everyone says not to trample the car too much, but you cannot use the lowest revs possible again. I always say that you can't spin the engine too much, but it must have its speed. So if the turbine turns on on average at about 2000 rpm, let's not go below this value, but use the range of about 2000 rpm to 3000-3500 rpm. Then we will drive the most economical and it will be healthy for the engine.
  • #20 8673485
    Meteo33
    Level 17  
    Posts: 319
    Help: 12
    Rate: 83
    Quote:
    And absolutely not step on the gas until it stops at low revs (around 1500) and high gear.


    Could you write something more why?
  • #21 8673611
    burza11
    Level 13  
    Posts: 112
    Rate: 28
    Meteo33 wrote:
    Quote:
    And absolutely not step on the gas until it stops at low revs (around 1500) and high gear.


    Could you write something more why?

    Just read my previous posts,
  • #22 8674196
    Anonymous
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  • #23 8674649
    Anonymous
    Anonymous  
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  • #24 8674694
    Anonymous
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  • #25 8674862
    burza11
    Level 13  
    Posts: 112
    Rate: 28
    Quote:
    Yes, but in trucks you have a smaller RPM range. There, 1500 can be called average revolutions, while in passenger diesel engines, 1500 is the lower range.


    Did I say that the truck also drives from 1800 to 3000rpm? I said that the RPM range when the truck's engine has the greatest power and torque is the same as the range where the compressor can be heard, I didn't mark the exact RPM range in the truck example.

    And with the resonance shaking it is right, with the rest, as I have already said, engineers in many diesels have marked the range from 2 to 3,000 rpm as green, econo etc. for a reason.
    Of course, all my statements are geared towards the turbo diesel.
  • #26 8691956
    palekkk
    Level 10  
    Posts: 11
    Rate: 2
    Diesel obviously does not like to be dragged on, but to save, you do not have it .. As I drove it is so 3.5 THOUSAND TO 4 ECH ... Diesels are now fast, they drive well .. It depends what motor, for example, on audi 2.5 tdi, you have to be careful because the timing is very expensive.
  • #27 8692023
    Anonymous
    Level 1  
  • #28 8720877
    jhosef
    Level 16  
    Posts: 260
    Help: 9
    Rate: 122
    ogur3k wrote:
    just the basis: do not press against the floor like a cold Smile, soon the scream will rise: "Such a course and synthetic ?! It should be mineral long time ago!" If someone proves it to me, I will send a six pack of Smile bro for adults, of course
    I fully support. I am for golf MK3 Td, 5w40 is pouring on a mechanical pump, the mileage is up to 300 kkm. When the guy poured it into my engine, he said, "it's your responsibility." And texts: rinse the engine and gaskets (as if they were not made of rubber).

    Oil is the most important. VW standard for VP 505.00, for PD (unit injectors) 505.01. If you have them, you must pour 505.01 oil. Apparently, it is about high mechanical pressures in unit injectors.

    My colleague Mihas66 is right. If the engine has a variable geometry turbine, you have to give it a blow. It is a pity to spend a few hundred zlotys on cleaning.

    I personally shoot my turbine because that's what it is for. Most often slightly over 3 k, sometimes up to 4.
  • #29 12488392
    japolzwkz
    Level 1  
    Posts: 1
    Rate: 4
    I drove 3 types of naturally aspirated diesels, 1.9 tdi, 2.0 tdi

    and they all drive similarly.

    1. you warm the candles
    2. you fire up, wait from 1 to 5 minutes (depending on the season)
    3.When the engine is cold, do not run more than 2000 rpm
    4.on a warm engine up to 4000 thousand (if you want it to run for a long time)
    5.be careful with the turbines, with a hard drive they quickly start whistling and then need regeneration (PLN 1000) or replacement for (new 3 weeks)
    6.after driving, wait from 1 minute to 5 minutes (depending on how long you have stopped) before shutting down the engine.
    7. take care of oil and filters
    8. refuel regular diesel at famous gas stations

    at this point i have diesel with dsg
    and the computer that changes gears, I think it is not wrong

    You put in gear 1 for a moment to start
    2 to max 2000 thousand turnover
    3 to max up to 3000 rpm
    4 etc as you feel
    brake the engine at medium revs, about 1500 rpm
    keep the turnover around 2000 up the hill

    every car is different, you have to feel it, turn off the radio
    and listen to the engine, you gotta feel it ;)
  • #30 12488851
    pablolinda
    Level 15  
    Posts: 438
    Rate: 120
    burza11 wrote:
    when it comes to economy, the fact is lower revs and the highest gear for common sense, but think about what the turbine comes to life when the auto mule goes to revolutions, it starts to work properly to ~ 2k rpm, the engine has insufficient air flow, the exhaust gases have much greater temperature and the turbine is boiling, the turbodiesel engine should operate in the RPM range identical to the RPM range of the correct operation of the turbine, i.e. around 1900 to 2700 rpm, of course, it depends on the car.
    I will give an example, driving an Iveco Daily in Eu, mulching it for a longer time up below the TS temp operating range, the coolant grows quickly, also holding it up in the correct range (when the turbo is blowing) the temperature is unchanged, often in trucks on the tachometer there is a field marked in green and this is the range of maximum turbo performance, according to the manufacturers, driving in this RPM range is the most economical, efficient and the motor lasts longer, they do not suck it out of their finger ...


    I fully support my colleague's statement that the turbine is to use it and it cannot become overgrown with dirt by not using it. And it is the turbine that increases the economy of the engine. If someone changes gears at 2,000 rpm, do not be surprised that then his engine is not powerful. And if he does not want to use a turbine and he has enough power without recharging, he should buy a car without a turbo. I will give a specific example of my father-in-law Corsa-C Diesel 1.3 without turbo on the 300km route with 2 people on board took 4.9l / 100 my modeno mk3 2.0 tdci 115km on the same route took 5.1l / 100 with 4 people. I change the gears so that the speed after changing to a higher gear does not drop after the turbine starts lower, i.e. 1900 rpm. This probably speaks for itself and then I feel that I am going and such sawing from 1500 rpm misses the goal of economic driving, so it can only be done with Go downhill. Anyway, it can be heard after the engine is buzzing, it means that it is too hard for him, and usually it is like that until the turbine starts to charge. At low revs, you can only use the first 2 gears, and not always, because in my bottom, on the second, it accelerates less. To sum up, in the cold one I change gears at about 2400, then after the gear change, the revs do not drop below 1800, in the warm one I change at 2800 and higher as needed. In addition, one of the principles of eco driving says that the desired speed should be achieved as quickly as possible, then it is most economical, and not such slow acceleration at low revs causes even higher fuel consumption.

    japolzwkz wrote:
    I drove 3 types of naturally aspirated diesels, 1.9 tdi, 2.0 tdi

    and they all drive similarly.

    1. you warm the candles
    2. you fire up, wait from 1 to 5 minutes (depending on the season)
    3.When the engine is cold, do not run more than 2000 rpm
    4.on a warm engine up to 4000 thousand (if you want it to run for a long time)
    5.be careful with the turbines, with a hard drive they quickly start whistling and then need regeneration (PLN 1000) or replacement for (new 3 weeks)
    6.after driving, wait from 1 minute to 5 minutes (depending on how long you have stopped) before shutting down the engine.
    7. take care of oil and filters
    8. refuel regular diesel at famous gas stations

    at this point i have diesel with dsg
    and the computer that changes gears, I think it is not wrong

    You put in gear 1 for a moment to start
    2 to max 2000 thousand turnover
    3 to max up to 3000 rpm
    4 etc as you feel
    brake with the engine at medium revs, about 1500 rpm
    keep the turnover around 2000 up the hill

    every car is different, you have to feel it, turn off the radio
    and listen to the engine, you gotta feel it ;)




    These recommendations are also used with these rotations on a cold engine, not entirely, but it is also a matter of what the cephaloid wrote about.
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Topic summary

✨ Driving a diesel engine, particularly a turbocharged one, requires understanding optimal RPM ranges for efficiency and longevity. Generally, it is advised to keep the engine below 2000 RPM when cold and shift gears around 2000-3000 RPM when warm to maintain power and reduce soot buildup. Higher RPMs (up to 4000) can be used occasionally to clear exhaust soot, but consistent high-rev driving is not recommended for longevity. Each diesel engine has unique characteristics, so drivers should adapt their style based on their specific vehicle. Regular maintenance, including oil and filter changes, is crucial for performance.
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FAQ

TL;DR: 4.7 L/100 km is achievable, and “Diesels like longer distances” [Elektroda, bixmixer, post #8274627]; stay between 1 900–2 700 rpm where the turbo works efficiently [Elektroda, burza11, post #8654787] Shift above 2 000 rpm cold, 2 400–2 800 rpm warm to balance economy and wear.

Why it matters: following these numbers can add years to your TDI and save litres at every fill-up.

Quick Facts

• Optimal cruising revs: 1 900–2 700 rpm for most TDI engines [Elektroda, burza11, post #8654787] • Recommended shift points: ≈2 400 rpm (cold), ≈2 800 rpm (warm) [Elektroda, pablolinda, post #12488851] • Turbo cool-down idle: 60–300 s, load-dependent [Elektroda, bixmixer, post #8274627] • Typical turbo rebuild cost: ≈PLN 1 000 / €220 [Elektroda, japolzwkz, post #12488392] • Reported fuel use: 4.7–5.5 L/100 km on mixed routes [Elektroda, ejdiaj, #8617616; Elektroda, excray, #8273973]

When should I upshift for best fuel economy on a turbo-diesel?

Upshift once boost is felt—around 2 200 rpm cold and 2 600 rpm warm. This keeps the next gear above 1 800 rpm, preventing lugging and cutting consumption to 5 L/100 km range [Elektroda, bocian21a, #8273645; Elektroda, pablolinda, #12488851].

Is it harmful to floor the accelerator at 1 500 rpm in high gear?

Yes. Full throttle at low revs overloads pistons and bearings before oil film stabilises [Elektroda, Anonymous, post #8692023] It also makes the dual-mass flywheel vibrate and can crack shells—an expensive failure case.

How long should I let a turbo-diesel idle after start and before shutdown?

After cold start, wait 30 s for oil circulation; drive gently until 70 °C coolant. Before shutdown, idle 1 min after city driving and up to 5 min after hard highway use so oil cools the turbo [Elektroda, bixmixer, #8274627; Elektroda, japolzwkz, #12488392].

Do I need to ‘blow out the soot’ occasionally?

Yes. Run the engine to 3 500–4 000 rpm for 10 s every 10–20 km. This ejects soot and prevents variable-geometry vanes sticking [Elektroda, Mihas66, #8274518; Elektroda, 8284647, #8284647].

What happens if I drive constantly below 1 800 rpm?

Coolant and exhaust temperatures rise, stressing the head gasket, while soot clogs the turbo. Iveco tests showed coolant creeping upward when lugged under 2 000 rpm [Elektroda, burza11, post #8654787]

Which engine oil spec does my VW TDI need?

Use VW 505.00 for rotary-pump TDIs and VW 505.01 for unit-injector PD engines. Both are available in 5W-40 synthetic blends that protect at high injector pressures [Elektroda, jhosef, post #8720877]

How can I tell the turbo is starting to fail?

Early signs: louder whistle, oil mist at compressor outlet, and delayed boost. Repair costs about PLN 1 000 if caught early; replacement triples that [Elektroda, japolzwkz, post #12488392]

Cold-weather tips: how high can I rev before the engine warms?

Limit revs to 2 000 rpm until coolant reaches normal. Higher revs on a cold block shear oil and risk turbo seal damage [Elektroda, bocian21a, post #8273645]

Three-step turbo cool-down routine after motorway driving

  1. Exit the motorway, shift down, and cruise at 2 000 rpm for 1 km.
  2. Stop, keep engine idling 120 s to stabilise turbo temperature.
  3. Switch off ignition only after idle drops smoothly. This routine prevents coked oil and extends turbo life [Elektroda, bixmixer, post #8274627]

Why do trucks cruise at 1 500 rpm but cars shouldn’t?

Truck diesels have narrower rev ranges and larger bearings that maintain hydrodynamic oil film at lower speeds. Passenger-car diesels need ≥1 800 rpm to ensure similar lubrication and avoid vibration [Elektroda, Anonymous, post #8674694]
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