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By Pass filters and synthetic oil 200 1990

posted by  Dick in Falls Church on  Fri Mar 28 13:08 CST 2003
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last visit: Fri Aug 1 10:33 CST 2014
[RELATED]

I have an AMSOIL bypass filter on my 1985 Volvo 245 turbo.
If you are driving a lot of miles every year, or driving a diesel, or have a fleet on the road, or using equipment 20-30 hours a week, a bypass filter is a super idea.
If you are driving 12-15,000 miles a year, and plan to keep the car many years, a bypass filter certainly wouldn't hurt anything. I wouldn't extend the oil drain past 1 year without using oil analysis--and that makes the bypass filter about equal to just changing a good synthetic (such as AMSOIL) every year.

A good bypass filter will remove very small particles and water. You should be able to use the oil about 3 times longer than normal, assuming a sound engine. The only way to be sure is with periodic oil analysis.






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