Not sure how much help it'll be but they normally put simple parafin into diesel engines to stop the diesel from waxing... (not sure if this translates to petrol or not).
it's possible to run with parafin in the mixture, and this mixture is a cheap and effective way to stop waxing...
however, the $80 that you don't want to waste running till empty is going to be wasted running rough at the start of next season... (regardless of the method that you use).
all in all you might be better to bite the bullet and drain the system completly. at least then you can use the fuel in a regular car, so that it's not wasted.
or even store the fuel in the warm ready for next season, (though fuel doesn't actually sit well and stale fuel will cause pinking).
it's possible to run with parafin in the mixture, and this mixture is a cheap and effective way to stop waxing...
however, the $80 that you don't want to waste running till empty is going to be wasted running rough at the start of next season... (regardless of the method that you use).
all in all you might be better to bite the bullet and drain the system completly. at least then you can use the fuel in a regular car, so that it's not wasted.
or even store the fuel in the warm ready for next season, (though fuel doesn't actually sit well and stale fuel will cause pinking).