Synthetic Oil and conventional oil mix

Tiny
RWEST747
  • MEMBER
  • 1999 CHEVROLET S-10
  • 3.2L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 45,000 MILES
Had a full synthetic oil change done, and then my wife topped off with half a quart of conventional oil recently.

Is there a major issue with this, and do I need to drain and refill with synthetic to purge out the conventional, or is this not a problem?
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Wednesday, February 18th, 2015 AT 3:41 PM

1 Reply

Tiny
HMAC300
  • EXPERT
No just run it like that until you have to add oil or next oil change. There is semi synthetic on the market which is 25% synthetic oil. You may see your oil go a little faster than normal however due to the mineral oil your wife added. Won't hurt it abit.
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Wednesday, February 18th, 2015 AT 3:51 PM

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