Waste veg oil

[Dum-Dum]

Whats been cooked in it Ben? Is it likely to be fatty if so let it settle as if the heavy fats separate out in your tank you'll clog lines quick. As it settles youll get 3 layers, water oil and fat and you only want the oil layer then filter this. To what level you filter it is down to how much you like changine fuel filters but if it were me I'd be using matts pikey t shirt method