1971 GMC C1500 Engine Oil

1971 GMC C1500
100,000 MILES • V8 • 2WD • MANUAL
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BISHIDA
  • MEMBER
  • 1 POST
Is it ok to put synthetic motor oil in my 71?
Jan 16, 2008 at 4:20 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,992 POSTS
Let me ask you this -why are you asking? what's wrong with the oil you're using now-sometimes using synthetic is not a very good idea. Prolong engine life!!
Jan 16, 2008 at 7:09 PM
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