Canadian Hummer Club Forums

Hello to all H1 experts! I am going to my mechanic next month for fluid changes. I need your input on which is the best brand of fluid to use on 1. Engine oil

2.transmission fluid

3. Tranfercase fluid

Your input will trully be appreciated. Thanks everyone!

synthetic is nice but too pricey,

15w40 Rotella,

dext11,

and Lucus 85w140 gear oil

I usually use 15w40 Rotella .