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Old 02-27-2008, 09:22 PM
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Do a 'net search about low phosphurus and zinc levels in the new 'Energy Conserving' type oils and you'll see what the rather cryptic message above means. It is a problem that the oil mfgs' know of, and several engine builders have also found...the hard way.
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Old 02-28-2008, 05:49 AM
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Default Zinc
I gathered this off of the web. It talks conciderably about the zinc contents in the new oils being too low. Claims that these are as high as .16 so should be good for older engines.

Castrol RX Super 15W40
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Penzoil Long life 15W40
Shell Rotella-T 15W40 one of the highest
Super Tech 2000 (WalMart) 15-40 next highest
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Old 02-28-2008, 12:25 PM
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Just make sure on the diesel oils you don't get "Delo LE"...different animal!
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