1999 GMC C1500 Synthetic oil

Tiny
PRINCE62
  • MEMBER
  • 1999 GMC C1500
  • V8
  • 2WD
  • AUTOMATIC
  • 123,000 MILES
I have a 1999 GMC Suburban 5.7 with 123,000 miles. Can I change to a synthetic oil. Would I need to flush the engine.
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Saturday, February 23rd, 2008 AT 10:19 AM

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Tiny
MERLIN2021
  • EXPERT
Yes you can, no don't flush!
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Saturday, February 23rd, 2008 AT 10:23 AM

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