Hopefully the two gallons will last me a long long time, anyway, the price won't be going down anytime soon. I also have a friend that has a couple of diesel C/L planes. If I didn't prod him along he wouldn't fly at all. So I supply his diesel too. I just purchased a Davis conversion head for a Thunder Tiger .46, not sure how thirsty that one will be. One last thing, I wait for a cold winters day to portion out the gallon into quart and pint containers, been working for me for years. Occasionally I will wind up with a partial pint not starting the engine and I have to pitch it. On summer days I have seen the vapors coming out of the can.