Question about 2000 Chevrolet Blazer

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Oil pressure reading

I just bought a 2000 Chevy Blazer 4x4 LS 4.3 vortex. I just changed the oil and filter. The previous owner put 5w30 so that was what I put in it. Before I changed the oil the gauge read 40. It has been 3 or 4 days now since I changed the oil, and today I noticed that it was reading 60. After running around a bit I noticed that when I stopped at a light or sign it read 20 then would jump up to a little above 40. Is this normal or am I looking at a new part to buy?

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I have a gmc envoy (same thing) and it does the same thing. normal.

Posted on May 28, 2009

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Temperature and rpm will cause changes in oil pressure. all the numbers you gave are fine. I'd worry if pressure dropped below twenty (actually 15 is still safe) and if engine was either tapping or knocking.

Posted on May 28, 2009

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1 Answer

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