Have been running a bottle of Techron fuel system cleaner....after refilling with around 6 gallons of gas and thus putting the concentration of Techron at 5.3 oz / 10 gallons...my most recent refill showed a 16% gain in mpg to 31.7 from 27.3 mpg. Only other changes were a new fuel filter (old one not clogged)...and 2 fuel line magnets*...slightly warmer weather.
Current cost for the Techron per 10G = $1.77...saving $4.46 per each 10 G...with gas at $3.39.
Would make some sense to use Techron at this concentration...so it will more than pay for itself?
LaPointe mentions using Techron at 3 oz/10G
in addition to acetone/xylol/Gp7.
* These are not $20 ceramic magnets...they are $4 worth of neo magnets...2 placed in series....I move them from car to car...just in case they work.