If you go with straight veggie oil (SVO) you'll definately need to keep the fuel heated or it will gel in the tank. I had B99 soy bean oil wax in my fuel filter this winter in souther California when the temp dropped to 36 F. Now I run anti gel or B20 when it is cold out and #2 when it gets in the single digits. Other than that I have run B99 for at least 3/4 of the 60,00 miles on my truck without event. good luck.