My '85 Mustang GT 5.0 HO ran 218,000 miles on synthetics and the day it
was totalled the engine was still tight, strong, smooth, and sweet with
compression 143 and oil pressure 42 PSI at cruise. My '67 Bug has
208,000 miles on the original engine and it runs like clockwork. Lord
only knows how long a modern engine like the LS-2 will run on that
stuff. I think any of the synthetics are so good that there's probably
relatively little difference between them.

-- Vandervecken



Joel Jacobs wrote:
> The first time I ever saw Mobil One synthetic was when a US Air Force flight
> line mechanic was topping off the oil in a DC-9 at an airbase in Japan -
> that was in 1972. I figured if it was good enough to handle the demands and
> heat of a Pratt & Whitney JT8D-9 turbofan it was good enough for use in
> all four of my C4s. I suspect the same is true of dealing with the
> "problems" of C5s and C6s....
>
> Since my current C4 has 124,000 trouble free miles on it - and my last one
> had 86K of the same - in Texas summers - I suspect Mobil One is just fine.
>
> Joel Jacobs
>
> '89
> '91
> '95
> '94
>
>