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#1
04-23-2012, 07:33 AM
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94 K1500 4x4 camshaft/oil question
I have a 94 K1500 4x4 with the 350 TBI engine. Is this a roller cam equipped engine? I'm worried about the zddp levels in oil for non-roller cam vehicles and I want to take the proper precautions so I dont wipe the cam.
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#2
04-24-2012, 11:15 AM
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Re: 94 K1500 4x4 camshaft/oil question
Quote:
I wouldn't get too worried. The valve springs are so soft that enormous levels of zddp aren't required. Wiping cams becomes more critical 1) during new-camshaft break-in; and 2) when the valve spring pressure goes up from stock.
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| The Following User Says Thank You to Schurkey For This Useful Post: | ||
andymikem97 (04-24-2012)
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#3
04-24-2012, 11:35 AM
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Re: 94 K1500 4x4 camshaft/oil question
good deal. Thanks for the help.
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#4
05-12-2012, 12:41 AM
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Re: 94 K1500 4x4 camshaft/oil question
I have the same truck and had an engine builder tell me that I shouldn't run any energy conserving oils that they will play hell with the cam and lifters. I run Castrol GTX High Mileage 10W30.
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NO 4 N JUNK  1994 GMC K1500 XC 5.7L 2008 Chevy Impala LTZ
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#5
05-15-2012, 07:59 AM
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Re: 94 K1500 4x4 camshaft/oil question
Quote:
Even the high mileage oils have just a fraction of the Zinc needed to protect older engines. I had a lengthy chat with my engine builder last weekend about oils and other stuff. he laid a whole ton of info on me. He said the only way to really be protected is to use an additive like ZDDP Plus, or a product Rislone makes called Engine Oil Supplement with Zinc treatment (see link below). Either one of these raises the ZDDP levels to 1500-1800 ppm (almost all current oils including high mileage are 500-800 max). I never had to worry about it with my race engines, as they were all roller cam equipped. The Rislone stuff is like $12/quart, and the ZDDP Plus is around $9 for a small bottle. Just wanted to share my findings. http://shop.advanceautoparts.com/web...9_T%7CGRP60033_____
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