I now have somewhat over 35K of seamless, trouble free driving on my 2 tank system. I haven't used the wvo when temps drop below 10f, not worth the chance that an unexpected shutdown will leave the internals of the fuel system semi solid, or that the wvo might cool down in the 6" of hose between the switch-over valve and the lift pump (wind chill driving 65mph at -30f is hard to imagine unless you have experienced it) Next step is manufacture of bio for the cold months. Bio can't be used here in the north from Dec to March because of its gelling properties; BUT it should work just fine in the heated side of my fuel system.

If you are serious about wvo don't scrimp on the system or the filtering setup, it will sour you on the whole process.

Jim

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2005 C240 4matic wagon (daily driver)
87 190D - 225K (on loan)
85 190D - 312K (on loan)
2011 Subaru Legacy AWD (Wife's)