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Old 06-07-2015, 05:41 PM   #1
macdodd
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oil pressure

Just changed my oil,,,,put in Castrol GTX 20w50. Oil pressure before was @2k rpm,@ 23lbs,,,now at @ 3k rpm,,,,only 25lbs. If I pump it up to around 4k rpm,,,still only about 35lbs,,,,hummm,,,maybe go back to another oil,,,,put some ristlone lead additive in the oil,,,,would that make the difference in oil pressure? Maybe go back to the 5w30? Jeeez,,,don't know,,,,Its a 350/ with 305 heads,,,,runs strong,,,valve seals need to be replaced,,,but doesn't smoke that bad,,,
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Old 06-07-2015, 06:24 PM   #2
cdowns
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Re: oil pressure

I'd call that good with nothing to worry about in an old chevy
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Old 06-07-2015, 06:28 PM   #3
hugger6933
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Re: oil pressure

The GTX is a good oil I wouldn't worry too much.
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Old 06-07-2015, 06:28 PM   #4
macdodd
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Re: oil pressure

Whew!!!!! worried there for abit. I'll leave it alone for abit, and see how it runs,,,thanks for the reply,,,been awhile since driving a '69 vehicle,,,,,LOL
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