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Originally Posted by TwitchKitty
This might be that site. They do something like that anyway. There is more to the site than the page I linked to, look around.
http://neptune.spacebears.com/cars/stories/mobil1.html
They seem to think that changing your filter and topping off extends the change interval.
Are you checking over at Bobistheoilguy? |
Thanks for the info on that site it is very informative. I have been reaserching a lot on this topic and I'm interested in the extended intervals mainly to avoid the waste of unwarranted changes. Most of the concern is on the filtration side, whether you opt to change just filters more frequently or use a frantz type of bypass filter (which I'm leaning towards). The oil additives seem to hold up quite well for extended use, but this itself cannot be generalized because so much depends on driving style city/hwy etc. I drive mainly highway, so I can see that soot levels should be better under control and the additive package in Rotella is holding up very well under these conditions. My next test at 10k miles will be a better indicator of my assumptions, I feel that some of the higher values like iron will actually go down and hopefully all else will stay the same...we'll see.
Since there are quite a few oil analysis threads out there maybe this can become a sticky or DYI on it's own, where everyone can post their test results and critical info i.e. engine type, miles, miles on oil, oil type, blowby (added oil) etc. That way all members could do some comparisons of results. There could even be two additional sections, one for WVO/SVO users and another for Biodiesel users (not blends but B100 and could be homebrew). I think this would begin to yield at least statistically acceptable ranges for all tested elements.
Just a thought, and admins agree?