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Date:         Sat, 4 May 2002 11:22:37 -0700
Reply-To:     Dana Morphew <kadm@PUGETSOUND.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dana Morphew <kadm@PUGETSOUND.NET>
Organization: Dana's Mobile Carpet Steam
Subject:      Re: oil: time or miles?
Content-Type: text/plain; charset=us-ascii

The two factors that either add components to or change the character of oil are oxygen and water. Oils have additives to prevent or moderate the oxygenation and acid forming processes that result. Synthetics may be somewhat immune to these processes or contain a larger quantity of the additives to give them their longer drain intervals. If time wasn't so short you could send in a sample from your crankcase and have it analyzed. This would be excellent info, and I, for one, would use synthetics if the time interval were increased commensurate with the mileage drain interval.

-Dana-

Bill Davidson wrote: > > Okay, other than around the block warm ups, my van has been sitting for two > years... oil was changed to Mobil 1 (100% synthetic) two years ago. I'm > about to head off on a big trip. The miles don't justify changing the oil... > but I seem to remember something about changing the oil after a certain > period of time regardless of miles. Should I change the oil before heading > off on my big trip??? > > Thanks, > Bill


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