What brand of oil do you use?

[ViragoBry]

SportTrac: Mobil 1 5W-30
Mazdaspeed 6: Penzoil Platinum 5W-30
Virago: Castrol Syntec 10W-40 & Mobil 1 15W-50

 

[addyguy]

Petro-Canada 'Supreme' 5W-30.

Installed at local quick-lube, 'Oil Changers'. I get FANTASTICK service there, and the price isn't bad at all. They'll even catch oil samples for me, no questions asked....