Engine Ice is nothing but deionized water and propylene glycol. You can obtain the VERY same results by going to the auto store and buying a gallon of propylene glycol (the non-toxic sort of anti-freeze) and a gallon of distilled water. You will have at that point about 2 gallons of coolant for approx $9.00 OR you can go out and buy Engine Ice that has taken the mixing out of the picture....and spend $70-80 bucks on two gallons.... Let's do the math! Don't overlook the fact that EI also contains a wetting agent, which, of course, can always be added to a home brew, and that there is a difference between ethylene glycol and propylene glycol. As far as the price, my half-gallon jug is marked at $14, rounded up. That means 2 gallons would have been $56, not $80. Sounds like you shop at the wrong parts store. It is, of course pricier than doing it yourself, but I have enough for both bikes for $5 extra, and I don't really have use for the left-over 1 1/2 gallons of mix.