The additive comes in three sizes -- a single application size, this
32 oz size ($10), and a gallon size ($25). I used 8 ounces on my
way to South Carolina and, by increasing my mileage by 1.5 miles
per gallon, it saved me 2 gallons of gas. In money terms, I spent
about $2.50 on the additive and saved $8 worth of gas, for a gain
of $5.50.
Better Gas Mileage
STU encouraged me to try this gas additive in order to increase the gas mileage I am getting in my van. When I purchased it at Auto Zone, the guy at the cash register said, "that is the best thing we sell in this entire store." I thought that was an impressive recommendation.
I've driven cross-country and measured my mileage many times. It is always 19.something. I've never gotten 20 miles per gallon. Using the Lucas additive on my way to South Carolina, I got 21 miles per gallon.