Hello, my car is burning oil. Mechanics told me that is related to "scratches" on cylinders (don't know how to translate word, not native English speaker)Can I use any additive to oil with this engine? Currently using motul 5W40 oil
If the engine has internal wear or damage no additive is really going to help. Also, the typical additives will thicken the oil which doesn't play well with the variable valve timing in modern engines.
Ok got it, so no cheap solution for that problem? only capital engine repair?
Unfortunately that is the case if the cylinders are actually damaged. However I would want to see exactly what led the shop to come to that conclusion (compression test? Leakdown test? Borescope?) Also maybe also get a second opinion. It's always possible you have something like a bad PCV valve that is causing the problem.
They used endoscope or borescope, to look inside cylinders, and 1 or 2 of 6 were damaged. Car works fine, no extra noise, no engine misfire or losing power. However car eats a lot of oil:)
Yes, cylinder scoring is a common problem with that engine, and no, there’s nothing to be done about it other than life with it or rebuild the engine.
Sorry to hear about that, but welcome to the forum.
PS: see additional comments below
Thanks for answer, do i need to fix it until i get extra noise from engine, engine misfire or lose power. Or i can pretty much live with it just add oil time to time?
After a little more research, I am going to revise my answer. It seems it is not something you want to just live with and add oil. May lead to more severe damage.
In some cases, it can be corrected with cylinder liners; still gonna cost a couple $grand, but not necessarily a complete rebuild.
I would take it to an independent German-specialist mechanic. For some reason, it seems to be a common problem with German makes (Porsche, for sure).