Hi,  I'm not sure there would be enough heat from the oil to do a good job.
Using the heater on a cold day may cool the oil down more than would be
desirable. I have heard of people putting a oil cooler in the car with a fan
behind it. I don't know how well that works either. Todd Francis

>Todd;
>        Why not add a oil to water heat exchanger like the one on the
>digifant system i.e. the box sandwiched between the oil filter and
>engine. That way you were helping to cool the oil. I would use an
>electric motor powered pump to circulate the water. Less loss of HP at
>the pulley.
>Drive Safely & Good Luck
>Ken Lewis<Kernersville,NC>86 VW crewcab;60 356B Coupe
>For Sale: 61 AustinHealey Sprite(not Bugeye);Daily driver $2500
>
>On Thu, 6 Jan 2000 12:53:43 -0800 Todd Francis <tbf@PACIFIER.COM> writes:
>>Hi All,   It seems to me that the best way to heat your water cooled
>>Vanagon
>>after installing a  air cooled Porsche engine is to make a water heat
>>exchanger around the outside of the muffler