Do stp cleaners work?

[digitalrain]

Just curious, did your gas mileage improve after that 1st tank went down?

Originally Posted by A-Dingo-Ate-My-Baby

I just did a bottle of techron on my 19,000 2010 yaris HB automatic


what happened was:

-for that 1 tank, gas mileage dropped

-almost immediately, throttle response improved

-throttle response continued to stay 'peppier'

It surely had to do something to clean my injectors. My yaris
never ran bad...I just figured throw in some bg44k or techron and techron
was what I found first. it does work.

next 20,000 miles I'll do another bottle