I have used Techron in the past in my Valk (which was totaled) I'm not sure it did much for it because I never had issues that I was aware of. I used it as a preventative measure.
My stealers parts man suggested I try Starbight's Startron.
The package says it cures "ethanol problems" Since he never steared me wrong, I bought a bottle.
Three remarkabkle things happened to my Valk;
1st the terrible exhaust smell was eliminated;
2nd the throttle response improved;
3rd the gas milage went up by 10 to 15 %.

The usual MPG was 35 MPG, now consistently above 38 MPG, 10% ethanol is all that is available around here.
Usually when I pull the trailer I was getting 33 MPG, last time (with Startron) I got 38 MPG.
I tried the product in my car, the gas milage went up also to 10 to 15 % improvement from 22 highway to 27 highway MPG. City driving went from 20 to 23 MPG.
The product will do other positive things. I checked with the parts man @ Auto Zone, he rates it the best for what it does.
If it does nothing more than increase my MPG, the product pays for itself, however it got rid of the nasty,

, nose burning

,eye tearing

rank ass stench coming from the exhaust is increadable, if that's all it did it is worth it IMHO.
