losh1971
Well-Known Member
- Joined
- Jan 17, 2010
- Messages
- 22,392
- Reaction score
- 22,006
- Points
- 113
- Location
- North Tas
- Members Ride
- VE Series I SS Ute
Recommended in Buick is 20w/50 I believe. However it's normally ok to drop down 5 winter weight, hence why on my fairly solid engine I run 15w/40. I could possibly get away with 10 winter weight but I'd be risking the cam bearings from the reduction in oil pressure.