OIL

1997 GMC

Tiny

lookauto

June, 24, 2009 AT 12:07 PM

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

FOUND 396 RELATED QUESTIONS

1 Answer

Tiny

mickey-d

January, 17, 2010 AT 8:44 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

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