Very interesting Goran you could send the water from your webasto through a heat exchanger bonded to the sump, it would take a while to transfer the heat to the oil. Where are you going Siberia? Pumping oil would be a big strain on a battery around 10amps. Are you after a quicker warm up for economy or engine wear? Have you seen the accusump? This stores pressurised oil so you can have full oil pressure before the starter motor even turns.
Cheers dave
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2002 S8 silver with black half leather
2000 d2 S8 in Racing green pearl, RS4 manual gearbox,
2003 A4 avant TDi
1997 Volvo V40 2.0T
1992 Mazda eunos v spec
1976 Reliant Kitten
1965 Porsche 911
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