Thanks a bunch for sharing that, SUPER info, NOT
coming from an advertisement
Joe :)
"Bryan A. Savage Jr" wrote:
> List
> I had the oil in my 89 T-Bird (same as the Airport rental) tested.
> The lab reported that the oil was highly heat stressed, the viscosity
> was above 50 and it contained a high level of iron. All else OK.
> At no time did the gage ever indicate hot nor was the oil ever low.
> It has never pulled a trailer. Four times it worked hard going
> uphill in the summer, gage went from 1/2 scale to 2/3.
> The oil was Castrol Syntec 5W-50.
> I was very puzzled.
> I called the lab and while discussing the above was told that if
> I used a synthetic base oil like Mobile 1, Red Line or any of the
> others, the viscosity would probably OK and the iron level would
> probably be 1/2 or less.
> He said that Syntec used a very highly refined petroleum base and
> performed in the standard test as well as the synthetic base oils,
> thus Castrol can call it "synthetic"
>
> Bryan
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