Question about 2000 GMC Sierra
It has about 96,000 miles on it.. I use Mobil 1 Fully Synthetic 5W-30.. Is the synthetic molecules too small that the oil is leaking through the 9 year old seals? And do you think I should I revert to conventional oil OR upgrade to high mileage Fully Synthetic that has additives that help protect and close up an leaking seals?
It's not good to Switch back to Regular oil after using Synthetic. Use the High Mileage oil. It will help a Little. Still Cheaper to replace a Gasket or two than a Rebuild. Got 214,000 + Miles on my 95' Silverado and No Leaks with High Mileage Valvoline 10-40.
Posted on Jan 03, 2009
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Posted on Jan 02, 2017
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