Oil change time!

[67ss&99ss]

I use Havoline 10w40 in my C/10. I have used it in the engine since I purchased it new back in 98. No problems with it. They are right about the Rotella losing its Zinc content. I ran it in my 'Cuda for several years, and still do, but I add a bottle of ZDDPlus to the oil when I change it now. I use Valvoline VR1 10w30 with a bottle of ZDDPlus in my 406 that is in my 67 Camaro. If you go with VR1, it needs to be changed every 1,000 miles or so. It doesn't have the amount of detergents in it that conventional oils have.