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I change the oil on our 2008 Hyundai snota about every 5000 to 7000 miles.
Whats different about the kia/Hyundai 3.3L V6 is it has an oil filter that is only made of the filter element, there is no out side canister. So when you remove it you can see whats on it.
The filter comes out perfectly clean and a few times I have tried to wash dirt out of the filter paper with lacquer thinner. Looking for big bits of sludge, soot or metal shavings and I get nothing.
In heavy duty diesel engines some times you get a fuel oiler. Its a block and a screw that adjusts a needle valve that bleeds engine oil into the fuel system.
Idea is you adjust the fuel oiler to leak about a quart of oil into the fuel system every 2 or 3 thousand miles, that way you are always adding fresh oil to the engine.
That way the oil automatically changes its self and you don't have to stop for an oil change.
Some engines even have automatic crank case oil level controllers. You put fresh oil in the tank and as the motor oil leaks out it gets replaced.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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