[Shotimes] Oil Gurus opinions wanted

[Epperly]

Superchargers for Mustangs also recommends 50w. I think it might have
something to do with the heat generated by the units. Early in the turbo use
there was a cokeing problem with the oil if the motor was turned off right
after a high speed run.
        Ken
> Hi guys,
>
> I'm doing some thinking on Mobil-1's recommendations.
>
> Their 15-50W:
>
> "Excellent for supercharged and turbocharged engines, muscle cars and
> amateur racers."
>
> Their 10-30:
>
> "Outstanding wear protection, even under the most extreme conditions."
>
> They recommend 15-50 for turbo applications, but wouldn't a 10-30 be
better?
> I mean, isn't heat the #1 killer of turbos?  If it isn't #1 then it would
be
> #2 behind viscosity breakdown (metal to metal contact), right?
>
> So if you're following my train of thought, I'm thinking that the 10-30
will
> flow faster through the components thereby removing more heat in more
time.
>
> So why do they recommend the 15-50?  I asked them in an e-mail, but it'll
> probably be six months before they type back and then, they'll just tell
me
> to read my owner's manual.
>
> Thanks for your thoughts,
>
>   Koll
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