Oil live depends on a lot of things,
1. The Air cleaner
2. Max oil Temp
3. Oil shear ( RPM)
4. Multi Grade Vrs Single grade
5. PCV Valve
and about 1 zillion others
If you want to extend you oil changes pull an oil sample and see what the lab
says.
A filter will not remove Antifreeze, acid, all insoluble or repair broken
multi-grade
additives such as polygluclamate aka (STP).
Doug
CoolVT@aol.com wrote:
> All this talk of oils and additives reminds me that we're dealing with rugged
> V8's here. I believe that they should last at least 150,000 miles with just a
> little care. For most cars I don't believe it's necessary to change the oil
> every 3000 miles. If there is a lot of highway driving I believe 7000 miles
> or so is often enough.
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