Originally posted by RF Overlord:
Originally posted by contourfreak22:
i heard if you add synthetic from regular oil it can ruin the oil seals.
contourfreak, that's an old wives tale. WAY back in the day (early-mid '70s) there were in fact seal-compatibility issues with some of the very earliest synthetic oils. Those issues were resolved 25 years ago. You can switch to synthetic at any time.
If your motor is heavily sludged-up and/or has not been properly maintained, switching to synth oil CAN cause small leaks as it cleans out the old hardened crap that may have been plugging up dried-out seals, but those leaks will clear up quickly.
think that is what happened in my duratec, first oil change to synthetic was ok, on the second on a leak started, changed the oil again and I don't think that it has come back
if you are concerned about changing over you could always run a blend first then go completely synthetic although from what I read you don't have to
- 95 Mystique LS - Zetec/5spd
- 99 Contour SeVT Sport - Duratec/5spd
Official NE-CEG Contour/Mustang Family
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