Engine oil Castrol or VALVOLINE

I only had two oil changes and stuck with the OEM Castrol 5w40 :thumbup:

Castro 10- 60 Audi uses it in R8 GT which is NA and not subject to extra thermal loaf of TC. Live in South Florida so cold starts not an issue and Sebring in August is HOT. Also run 50 % VP 103 in summer to cool things a bit and reduce prevent timing loss.

I run the OE Castrol because I still have CPO warranty for another year.

Performed the oil and filter change this morning along with a good inspection of the top and bottom of the motor. Everything looked great, nice and clean.

I think what helped as much is the valvoline oil. Valvoline really agrees with my motor. Not sure why I have trouble with some of the other blends, but it's really quiet with the ashland add-pack.

Castrol is notorious for getting dirty very fast (detergents is the popular explanation). Why I like Mobil 1 a lot, doesn't discolor nearly as fast and still a very good synthetic oil.

Valvoline VR1 non synthetic. It is one of the ZDDP oils. Reasonably priced and the Z seems to like it.

Castrol Magnatec 5w-30. Love me some Castrol.

[Valvoline SynPower](http://www.valvoline.com/products/brands/synpower/full-synthetic-motor-oil/5) is what I have run since I purchased my 2012 Subaru Legacy.

Castrol 0W30 (a.k.a. German Castrol :thumbup seemed to shear thin very little over a similar interval, which is why I preferred it.