Quick Ques...

[**b**]

oil that is
Black Gold
Texas Tea.....

i have 95k on my
K5...

For the summer iwas thinkin'
of running 20\50 weight...

Will this give me problems???

 

[slodawg]

I run rotella 15w40 in both my k5's. Got around 124,000 on my 75 model (350) and 10,000 on my 78 (350) after a rebuild when it had 165,000 on it. Ive never had any complaints.

 

[1bad2]

I've got 100+k on my 88 and use 10w30

 

[Blazer1970]

It's best to run the smallest cold/hot viscosity ratio (10W30) that you can get away with. The viscosity modifiers that they add to get a big ratio are not the best stuff to be pumping through your engine if you don't need to. Stick to the manufacturer's recommendations.

Tim

1970 Blazer CST 4X4 350 SM465 NP205
1987 Suburban 4X4 350
1988 Chevy Pickup 4X4 350

 

[**b**]

10/40 it is then..
maby a shot of mystery oil???

 

[Executioner]

If you can find it give 20w-40, or 15w-40.