You should give new oils a second chance, they may be cleaning up what other
oils left behind ;-)
> I ran Royal Purple for one change and sent it off to Blackstone for an
> analysis. The results were not good. All of my wear materials were much
> higher than average. Silicon (dirt) was still below average so I know it's
> not an air intake problem. This was with 4500 miles on the oil. Before this
> sample, my oil has always come back with below average contaminant levels.I
> have another sample of Mobil 1 with them right now that I'm awaiting the
> results on. If the contaminants are back to normal, then I'll have my own
> opinions on the Royal Purple motor oil. If the levels continue to be high,
> I'll be looking at saving for an engine rebuild. I'll post the results as
> soon as I have them.
>
> just my .02
>
> John
> http://jndneff.home.texas.net/dakota/dakota.html
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