Powermaster Fuels stood behind the product with no reservations-sent one email and answered one email from them and they took care of the shortage beyond what was expected-and did this in a two day period-I am completely satisfied and will continue to use the product-I have never had a fuel problem at the field-although I have seen other guys dead stick all day and switch to powermaster and the problem goes away-I am no expert, and the way unleaded gas is being priced I will be trying glow fuel before the winter in the Suburban