On 3/31/2011 11:50 AM, Doug Miller wrote:
In , Jeff wrote:

Let's assume it does work.

20 gal tank @15.2 = 304 miles
20 gal tank @16.3 = 326 miles

So, 22 extra miles $2.97 + tax.

22 miles / 16.3 mpg * $3.50 per gallon = $4.72.

The price per gallon of fuel for one tankful is immaterial.

If the fuel system cleaner did anything at all, it will do it for many
many tankfuls of fuel, you don't add it each time you fill up.