I've been giving this some thought but might still go with a two tank conversion. Either way is it suitable to use the stock tank for WVO? Or are most people having auxillary tanks constructed?
Rich

use two tanks. for in the winter you have to heat the oil to burn up to 160 f . and fuel filters galore.

The single original tank has been working just fine for me. It depends on your climate, of course. I'm in the SF bay area and around here it's no problem.

I started off with a one tank and all worked fine (with the addition of a coolant heated fuel filter). Then I decided to install a second tank for diesel for starting up on, and ever since I have been plagued with air leaking into the fuel lines (probably because there are so many more lines now) and the switchover valve seems to be leaking, because I don't even use the auxiliary tank anymore, but it slowly fills up with veggie oil. I am thinking of simplifying everything and going back to one tank.

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87 300D - Running on Veggie oil; 260,000 plus miles; Original #14 head