How long have you ever gone between oil changes?

[frambach]

Originally Posted by fnkngrv

To be completely blunt you can't just "look" at used oil. That does not a bit of good. Case in point is a guy on the new 1nz Enthusiasts Garage from PR. He had an analysis report done on his Royal Purple. He was pretty disappointed because it always "looks" good.

From my m-o-b-i-l-e

A person can draw no conclusion on the state of their oil by simply looking at it other than to check the current oil level.

I've never seen Royal Purple perform overwhelmingly good in any real test (going back 3+ years). It's just a middle-of-the-pack, well marketed motor oil in my opinion.

Originally Posted by malibuguy

I run amsoil 0-20w with a corolla amsoil filter. 15k intervals and im at 73k. Motor runs amazing and is gorgeous inside.

What filter number is that? What's the benefit of running it over the recommended filter for the Yaris?

AMSOIL has discontinued the EA15K10 if that's the filter you were running, you're going to have to revert back to the EA15K09.

Originally Posted by Exiwolfman

We'll than the problem is not so much the oil but filtration a better way to keep it clean as the article states ,it can last a long time . That maybe true problem is that it brakes down do to the contaminants like I said I see what comes out ....I for one do and always will change my oil at 5k ...longer life ,sludge free engine .


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Wolf, if you could see the inside of the motor was clean and you got back a used oil analysis with 5,000 miles on the oil that said 'your oil is absolutely perfect, there is no need to change it right now', would you still walk outside and drain the oil?

Filtration is not the issue either. With a completed analysis, there would be tell-tale signs that the oil filter was no longer effectively doing it's job and that's not happening. I'm looking at my most recent analysis in another window while I type this. The following are families of metals that are all checked on a UOA:
- wear metals
- contaminant metals
- multi-source metals
- additive metals
They're all good! I can take off my oil fill cap and shine a light in my valve cover, it's so clean! When I remove my oil dipstick, there aren't any varnished up spots on it. My dipstick looks like it did the day the car had 1 mile on it. You know how dipsticks will get that used oil 'glaze' in certain spots? Not mine.