Dunno what kind of oil they cook chips in where you come from, but what goes in my tank is a lovely light coloured golden liquid, filtered to 1 micron, which is more refined than what comes out of the pump on your local forecourt. ![Roll Eyes ::)](http://images.omegaowners.com/forum/smf2000/Smileys/oofstd/rolleyes.gif)
Are you seriously trying to argue that cooking oil is less viscous than diesel?
And as I said, real diesel doesn't sustain bacterial growth in the tank/lines/filter.
Nope, but stating that your assertion that it has the viscosity of toffee is plain wrong. The action of filtering it to 1 micron means it may well contain less contaminants than pump diesel. The viscosity only becomes an issue in really cold weather, when mixing a small percentage of petrol in cures it. A mechanical Bosch diesel pump wont struggle to pump vegoil at all, so thats not a problem either. No particular risk of bacterial growth in the fuel system as the oil doesn't sit still or stay in there long enough to sustain it.
If it was a cause for concern, a small percentage of petrol or larger percentage of diesel mixed in would likely prevent it.
Its not something that I have encountered in tens of thousands of miles of WVO usage.
As you say though. Not really worth the bother if you only intend driving it a couple of thousand miles before getting shot of it.