Castrol Syntec on new engines (older ones get conventional Castrol GTX). Castrol gives the best performance for the price, and contains a very low quantity of wax. Mobil 1 is also good- but, again, expensive. I don't use seal 'conditioners' (swellers) in any of my engines. Higher mileage engines get thicker oil.
For filters, I use Wix (if I can find them) or Motorcraft (supposedly made by Wix). I don't use the Fram junk (PM me for details)- they fall apart inside. The premium line oil filters sold at Carquest are made by Wix also (most of them).
__________________
Greg - Owner/Operator: GRH Performance
|