[TR] [Wedge] ZDDP Levels in Various Oils

[TR3driver at ca.rr.com (Randall)]

> Factory rec for the tr3 was 30w, before multi-grade oils.

Practical Hints (the factory owner's manual for TR3A) lists a variety of
weights, from 10W to 20W40, depending on expected air temperature.  

Earlier editions also listed 5W, but only for use in temperatures below
-10F.  Evidently they realized they were selling many cars to the poles,
because that line was dropped later on <g>

The TR3 version listed 40 weight, rather than 20W40, for temps over 70F.

-- Randall