Chris@Optimum
Optimum Product Support
$40 per gallon. 1/2 oz per gallon to make solution, 2 gallons to wash car=$0.31 or 3 gallons for a large or dirtier car=$0.46 or 1oz per gallon to be "safe" as many on here do=$0.62 per wash...Ummm, yeah I think it's worth it.