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How's it going, I have a 96 blazer with a shaky oil pressure…

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hi how's it going, I...
hi how's it going, I have a 96 blazer with a shaky oil pressure guage that reads a little
above the red at idle, and 40 psi when at 30 mph, problem began after I took the truck on a long trip 600 miles and added non 50/50 antifreeze, then just an hour ago added almost a gallon of 50/50 antifreeze to the engine after draining radiator of previous mistake, what do you think?
Submitted: 3 years ago.Category: Chevy
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Answered in 4 minutes by:
6/24/2015
Chevy Mechanic: Gary, Chevy Technician replied 3 years ago
Gary
Gary, Chevy Technician
Category: Chevy
Satisfied Customers: 18,031
Experience: 15 years GM master tech
Verified
is this coolant system loosing coolant ?adding a non mix of 50/50 coolant will never cause any internal engine damage unless its over heating or coolant is being lost and no visual leaks and going into the crank case with the engine oil
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