1999 z71 5.3
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My 99 5.3 when starting eng cold oil pressure is very low unless rpm is at 1500, after warms up stays at around 40 has 183,000 miles
Last edited by rbubba2; May 4th, 2010 at 6:23 PM. Reason: left out some words
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the only think I put 20-50 in was my harley. Diesel trucks don't use oil that heavy. should help alot to use 5-30. I think maxx ment to thick unless you live on the sun.
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I know what you where saying and just got mixed up. I just did not want someone that did not know much about oil to put 20-50 in the truck becuase there where going to alaska this winter. lol Man that would suck.
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