1997 GMC OIL

  • Tiny
  • lookauto
  • 1997 GMC

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

Do you
have the same problem?
Wednesday, June 24th, 2009 AT 12:07 PM

1 Reply

  • Tiny
  • mickey-d
  • Member

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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Sunday, January 17th, 2010 AT 8:44 PM

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