The very first thing you should do is secure a source of clean WVO (preferably Canola). This can be a bigger challenge than it may seem on the surface, depending on the WVO activity and rendering companies in your area. There is no point delving any deeper until you can ensure yourself a good clean source of WVO.

My 2 cents (I have a good reliable WVO source locally)

SteveM

__________________
'93 190E/D 2.5 Turbodiesel 5-speed (daily driver)
'87 190D 2.5 Turbo rustbucket - parts car
'84 Dodge Rampage diesel - Land Speed Record Holder
'13 Ram 2500 Diesel
'05 Toyota 4Runner