1989 Chevy Blazer oil

1989 CHEVROLET BLAZER
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WRTIBBET
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Engine Performance problem
1989 Chevy Blazer Engine Size unknown Wheel Drive Type unknown Automatic 200000 miles
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I have been using Castrol Syntec Oil for a couple of years. A mechanic just changed my while doing other thing. He put in Havoline motor oil.

Am I in danger of hurting my motor???
Mar 19, 2008 at 4:16 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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