Engine oil Castrol or AMSOIL

Used 5w40 castrol for most its life, but vw504 standard is good too. Using it now and the old man says it runs good.

My Mazda3 which I service myself now, Castrol edge 5w-30 and feels happier. Same engine too.

I always used blue "german" coolant in my e90 bmw oddly it also recommended Castrol oil. Specifically called for it in oil cap

i drive 85% freeway so i change the oil and oil filter every 7500 miles using Castrol Edge 0W-20 synthetic oil since 2017 no vehicle issue.

I put Castrol euro 5w-50 made for BMW and it's 6-7 liters and change it every 5000km I have a 2003 330ci and it still runs like new

5w40 VW 502 spec. Audi recommends Castrol so that's what I use.

I change oil once per year, using a high-quality synthetic that meets specification 504. I generally drive 8 to 9 thousand miles per year. The maker of the oil I use (Amsoil) says to follow the car maker's change interval.

Personally i never run ”GM” oil in my 95s anymore. I usually run Castrol edge 0-40

I personally have used the RN17FE 0W-20 (Renault branded Castrol GTX bottles) for 10k km after the innitial oil that was filled in the factory (I don’t know which one was filled in factory). I haven’t noticed any better fuel economy but that can be tough to determine because I drove the car mainly through the winter and did more shorter trips than the original factory first fill oil that I drove with during spring and summer.

Amsoil as an oil is trash. We used it for years and our reports were always tetering.