Engine Performance problem
1997 Other GMC Models V8 Automatic 91000 miles
my truck is a diesel what grade or weight of oil should I use? No owners manual in truck
have the same problem?
Wednesday, June 24th, 2009 AT 12:07 PM
I prefer a good 15w40 oil, Shell Rotella is one, and maybe a 10w30 for colder climates. I'm sure some will disagree, but it's personal preference. When I lived in N.Y. That's what I used in my diesel Caddy. Mickey-d