Engine oil Mobil or IDEMITSU

04 Silverado, 186k been using Mobile 1 full synthetic for the last 10+ years. Runs great!

My 02 Avalanche has has mobile 1 full synthetic it's entire life, and has 750k miles on the original engine. Never been opened or rebuilt. Piston slaps like a diesel on start up, but still running great.

Mobil1 0w-40 Full Synthetic

I use mobil 1 on my 2007 k24 I\u2019ve been the only owner

I'll stick to Honda coolant, mtf, and power steering fluid but oil I go with Mobil 1.

Just switched to Mobil1 from using whatever the dealer uses and my car runs so much smoother. Mobil1 from here on out.

Mobil 1 FS is the absolute best you can give your car, in my humble opinion, but any modern fully synthetic will be more than enough.

5-30 mobile one. Thats the only brand of oil I let touch my cars.

So if you review the virgin oil analysis database, it includes idemitsu 0w-20 and 5w-30 and for both, the TBN is rather weak in comparison to other more readily available blends, also, the viscosity at 9.5 cSt for a 30w, some 20w come close to that. Does any of that matter? Not a whole lot, but it shows that there's nothing special about the oil. Generally speaking, higher TBN is better.

The mobil one was like some kind of extended use oil. It said it was good to go for like 20k miles or something lol. The engine burned a quart of it in the 10k miles I felt safe running it for