quote:
Originally posted by Bror Jace:
Chevron's base oil is a tick better than Castrol's last time I got the skinny on both. I've forgotten where Castrol buys their base stocks from but Chevron's "iso-syn" is hydrocracked to a degree and either a very stable Group II or Group II+.
Chevron Supreme has the reputation for leaving engines cleaner than most Castrol products ... but this is anecdotal and Castrol could have updated their formula 2-3 times since then.
GrnZoom, I doubt you'd have any trouble with any dino oil with short (3,000 mile) drain intervals but my preferences are Chevron/Havoline and Pennzoil which uses a hydro treated base stock as well.
Quaker State, Castrol GTX and most others occupy a 2nd tier of brands (for me). Because of marketing decisions, Chevron and Havoline are less expensive than most other national brands.
I avoid Valvoline All-Climate because you are paying a premium for the name/marketing/image and it appears to have the weakest additive package of any oil in its class.
--- Bror Jace