Owner reviews for engine oil

but real talk: Castrol GTX Synthetic 10w40 in Tennessee summers and 5w40 in winter.

5W30 Castrol edge full synthetic

Motul 8100 5w-30

Castrol Syntec 5W-30, because of this: [https://my350z.com/forum/engine-and-drivetrain/258663-vq-oil-analysis-and-info.html](https://my350z.com/forum/engine-and-drivetrain/258663-vq-oil-analysis-and-info.html)

Between it and the Castrol Syntec 0W-30 it has less wear indicators in the oil than any other brand, at any other weight.

Redline and motul are the best but I’ve been running catrol for 50k+.

Fuchs Titan 5w30

Motul 8100 5W40 (track toy)

Currently running it in my B7 S4 with no problems.

Mobil 1 since day one (first oil change). 5w-30 (as per vehicle spec). 316k+ original owner miles. Virtually no carbon or varnish.

I went through a lot of different oils in my old highly modified WRX, found this to run this to run the smoothest also no metal dust when I drain the oil on the magnetic sump plug.