SAE paper with 'fleet' vehicles. What about my minivan soccer mom remote started all season multiple-starts/restarts daily fuel diluting turbo'd high compression non turbo'd vvt nonvvt low compression e85 diesel e10 non-E fueled overheating underheating sludging notsludging...
The problems with ANY study or paper are the VARIABLES. There is no SAE paper or independent study that matches my engine, oil chosen, driving style, automaker engineering defects, filter chosen, or any other of the numerous parameters.
I prefer to recycle oil and prefer not to recycle engines or vehicles.
From what remember at work, oxidized AW additives still perform AW function in synergy with non-oxidized additive. Together, they work better. But, I haven't written a SAE paper on it. And you wonder why some(but not all) are not seeing drastic increase in wear, exclusive of oxidation/nitration/viscosity, with extended oil change intervals? Frantz oil filter never change oil anyone?
And, that disgustingly filthy dirty jug/bottle non-ISO oil will always increase initially wear after a change until that bottle of dirt filled oil is filtered. Since we would filter new oil for the machinery prior to use, or order specific ISO filtered bulk(vs non filtered), we didn't experience that so-called increase in wear after a fluid change. And again, been too lazy to write a paper on it but have seen what is on the bottom of your oil bottles/jugs(really scary VOA microscope looky). I just haven't seen the washing out of old additives prior to allowing new additives to take effect, as there is continuous displacement/dispersion. Again, would be additive type dependent and most oils have a little of this/and that/and what you can't see.
If you have been study-lobotomized, eco-lobotomized, sae-paper-lobotomized, enviro-lobotomized,.... you are programmed to not thinkly freely enough and can't make simple judgement or adjustments to issues or failures.
Emissions? VW had the right idea!
