Jack,

5W40 Rotella T6 synthetic. That big Arkansas box store. $20/gal. And
no.... the oil specified in the '84 owner's manual is no longer
manufactured. As engines have moved away from a flat tappet design,
manufacturers have changed the oil specifications. Typically removing
the zinc (ZDDP) necessary for reduced cam wear in our engines. Diesel
spec oils have the maximum in currently produced lubricating oil.
Rotella T6 synthetic has the highest concentration of all current mass-
produced motor oils.

< http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2330040#Post2330040
 >

Jim

Kindness in words creates confidence. Kindness in thinking creates
profoundness. Kindness in giving creates love.
--Lao Tzu

On Nov 2, 2012, at 9:27 PM, Rocket J Squirrel wrote:

> I'll need to bust out the owner's manual to see what they recommend
> for
> the Cold Season. Nights down to mid-teens (F), days up to 40s. Is this
> ca. 1984 manual still my guide to all things engine oil?
> --
> Jack "Rocket j Squirrel" Elliott
> 1984 Westfalia, auto trans,
> Bend, Ore.