i've got valvoline vr1 20w50 in the truck with a motorcraft filter and the falcon has castrol 10w40 for this winter with 1 pint marvel and a wix filter.
I used to use castrol, I changed to valvoline because of the advertisement w/ the scotsman whipping people from behind. I e-mailed castrol, they said this kind of violence is funny.............I missed it
Valvoline VR-1 20W50 in the '56. Pennzoil 5W30 synthetic (will be 10W30 next time) in the PT cruiser turbo. Mobil One 10W30 synthetic in the Navigator. Rotella straight 30 weight in the '92 F250 diesel. Used Pennzoil Long Life 30 wt for 18 years and then couldn't find it anymore so now it's Rotella. Old Goldwing has 20/50 Mobil One.