Jack,
And where might the rest of us find this modestly priced oil?
TIA,
Jim Davis
Fortson, GA
CF38690UO
CF37325U
Jack W Drews wrote:
>
> I've resisted joining the recent discussion on this subject, but today I
> tore down my Triumph TR4 race engine and thought others might be
> interested in my findings. I tore it down because although it still had
> excellent oil presure, it was exhibiting too much blowby. Tests showed
> 10 - 15% leakdown, confirming my suspicions of leaky rings.
>
> The engine has thirteen events on it, amounting to about 40 hours at
> racing speeds. We intend to limit rpms to 6000 but occasionally exceed
> that. When starting the engine, we always crank it over until we see oil
> pressure before turning on the ignition.
>
> Rod bearings: Excellent -- virtually no wear
> Main bearings: Excellent -- small shiny areas at edges of rear main only
>
> Valves: exhausts ready for grinding
> Chain tensioner: Surprise! very little wear
> Rings: Little tension. The pistons almost fell out.
> Pistons: virtually no scuffing
>
> Conclusions: The oil we're using is performing superbly. We use Mystik
> semi-synthetic 15W - 50 and change only twice a season. This oil is not
> mass-marketed, but rather targetted for the trucking, agricultural, and
> construction industries. It's about a third of the price of oils like
> Mobil 1.
> --
> uncle jack
> TR4 - 10 mpg
> TR6 - 30 mpg
> (plus a few other differences)
|