Mistakenly Mixed 10w40 and 15w40 Engine Oils: Change Oil or Continue Driving?

Hello, I added 10w40 oil to the 15w40 oil by mistake, do you need to change the entire oil or can you continue driving ??

I assume that you have added no more than 0.5 liters for 4-5 liters. Nothing will happen. You don't have to change.

How much did you add it?
As soon as a little (e.g. 1l on 3l in the engine) you can drive to change.
Greetings J.

I added less than a liter for about 3 liters in the engine, so I can drive another 3000 km for replacement.

You haven't written what kind of cart it is, but a Ferrari is probably not ....
Greetings J.

It may not be a Ferrari, but it is close to it golf III benz.

Buddy - I wrote so that you would start such posts in the future with information about the brand, type and mileage.
And by the way - once in a less than 2-year-old vehicle (although it was a Daewoo but an Espero 2.0 16V version), brilliant service technicians at the warranty service (obligatory) changed my oil from fuul synthetics to ...... .... mineral. And they said I could ride it until the next change !!!!. I firmly requested a flush, flush the engine, and top up the right one. They were very reluctant to do it, they probably did not wash the engine, and they certainly did not change the filter again. As a result, the previously dry and clean engine with a mileage of about 100,000 km began to let off the oil. It was the only car in my almost 30 years of driving practice (I had 12-13 cars - I can not count exactly) when I changed a newer car to an older one - less than 3 years of Espero for a 4-year-old B4 Passat. And, gosh, I had to pay extra ...
Greetings J.
ps
Recently, my son, in the enthusiasm of replenishing various fluids, poured distilled water into the oil (in the already mentioned 13-year-old dog)
Fortunately, he realized that something was wrong (the coolant indicator was still blinking) and without starting the engine, he called my dad. I was draining the oil and rinsing the engine in the underground parking lot under his name ....

Are you seriously asking, are you kidding? After all, there is nothing to talk about. You basically flooded some better oil. In addition, I understand that this 1 liter is operational consumption. And if the car uses that much oil, it won't be picky.

With this amount of refills, nothing will happen, you will easily commute for replacement.

Certainly nothing will happen. But how can oils be confused.

Surely nothing will happen, since the thicker oil disappears into you, this one has a chance to disappear even faster in the engine. Although it may be different, oils that are supposed to be "less" (better) do not lose their density as quickly as the "thicker" ones, but it is a matter of specification of a specific grade and manufacturer. In addition, modern oils are fully miscible with each other and you have nothing to bother with.

I used to have a polonaise and I poured it with whatever I had at hand (including the gear one ) and the car was running, but once I had a client who did not know what his engine was flooded with. He added one and lost his pressure for a few kilometers. After removing the pan, it turned out that the oil had turned into a thick, sticky substance that clogged the oil pump dragon.

Buddy, why don't you exchange it for 10w-40 at all ??? This engine should work on such. Ah, I already know why - because many people repeat urban legends about the disastrous effect of this oil on the old engine. Total nonsense. I have half a bubble in my car and I am pouring 5w-40 and nothing happens. And when I bought it, the mastic was 15w-40. I have been driving this way for several years and tens of thousands of km. Yes, it is possible to flush out the muck or unseal the engine - but forgive me; if the engine stays on syphilis, it only needs the repair, not good oil - if it is healthy - add 10W-40 at the next replacement and do not tire the engine with mineral oil. Nothing will happen and you will extend his life.
PS BTW all engine oils are currently miscible with each other.

Sharuga wrote:

Buddy, why don't you exchange it for 10w-40 at all ??? This engine should work on such. Ah, I already know why - because many people repeat urban legends about the disastrous effect of this oil on the old engine. Total nonsense. I have half a bubble in my car and I am pouring 5w-40 and nothing happens. And when I bought it, the mastic was 15w-40. I have been driving this way for several years and tens of thousands of km. Yes, it is possible to flush out the muck or unseal the engine - but forgive me; if the engine stays on syphilis, it only needs the repair, not good oil - if it is healthy - add 10W-40 at the next replacement and do not tire the engine with mineral oil. Nothing will happen and you will extend his life.
PS BTW all engine oils are currently miscible with each other.

Nothing to add or take. 100% support.

Synthetics are not poured into engines that like to nibble on oil because then they smoke and stink, and the mineral burns up nicely and there is almost no trace of it .

Owik are right, I should close the topic, which I am doing here. Your post has been reported. I sent it to the trash.