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Reply to "Good and Cheap ZDDP"

E agree with the post of TallPaul from 5-10-07. I drive a 1979 Dodge pickup w/ a 225 slant six. Older engines, with heavier valve trains and higher spring pressures definately benefit from use of a zddp additive! Check out the specs. on 15-40 oils and perhaps Castrol 20-50 and add a bottle of STP red (4 cyl.)at oil change. You older vehicle will love it.
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