> If it preheated the oil to 100F on a 0F morning, then the $100 price tag co=
> uld be justified, sure. But a 10 degree rise probably wouldn't be worth it.

There were predecessor versions of this heater for air-cooled beetles
and buses.  I have one installed on my '81 Vanagon.  I don't know
the wattage.  When it was -15 F, I would say that it helped but
it sure didn't keep the oil anywhere near 35 degrees.  But there
is a big difference in -15 oil in the sump and +15!

Richard