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    Anybody here use Duracool refrigerant replacement?

    I've only read a few posts here and the product seems to work for those people. I have two older heat pumps, 1988 and 1990 using R22, that work pretty good, but I've heard Duracool HC refrigerent will make them run cooler, blow cooler air, last longer, sess prone to leak due to larger molecule...
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    Longest OCI listed in owners manual for 2007 Ford?

    Anyone know what the longest oil and filter change interval listed in the owners manual is for 2007 and 2008 Ford diesel F350 requiring CJ4 oil? A customer of mine that does oil changes needs to know.
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    Does Royal Purple meet 2005-2007 warranty requirem

    I noticed Royal Purple's oils do not include API SM or GF-4 designations. Does that mean they will not meet the warranty requirements of 2005 and newer vehicles that state the oils must meet these designations?
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