Quote Originally Posted by aaronng View Post
You should use 10w-30 and move up based on climate and engine age. Thickest I would use is 10w-40. If you must use Penrite, go for HPR 5
Why do you recommend Penrite HPR 5? isn't it too thin.

According to the Penrite website, they recommend HPR 15.

I have received recommendations for HPR 5, 10 and 15. Will it make a big difference if chose one compared to the other?