09-02-2013, 02:09 PM
Sunflower oil doesn't wax up as easily as veg so should be fine straight or with only a1/4 tank of derv if temps drop to freezing or below if you really want to err on the side of caution.
Personally I think you'll be fine on straight sunflower as I've run it on my old xrdt.
Personally I think you'll be fine on straight sunflower as I've run it on my old xrdt.