Having problems with your 1993 GMC Sierra ?
I have 185000 on my 5.7liter what type of oil should i be using?
My personal preference is valoline SAE 30 been running in my 89 p/u 5.7l with 386,000 still running strong, but kinda depends on what kind of weather you live in, me im in southern calif which weather here i can run the SAE30 all year around
Repair Help & Product Troubleshooting for 1993 GMC Sierra
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