Schaeffer ManufacturingCo. 0131C-021S SoyUltra Gasoline Additive, 12 oz. Bottle

I use all Schaefer products on my diesels. Trying this out for my wife’s 4Runner. Will update at some point

Schaeffer has the best products, I swear by them. This made my girlfriends car idle a bit smoother no noticeable difference in mpg but I only did a one time treatment. I also used it in my work car that was on its last leg. The difference was noticeable almost immediately about a quarter of the way through the tank of gas it was running like a top. About half way through the tank though it must have caused some gunk to break loose and it clogged and injector. So maybe it works to good!

I started using this in my 2014 Chevrolet Silverado 5.3L and picked up 2.5 mpg plus it idles smooth once again. I knew schaeffer made great products but its nice seeing something like this make a big difference!

Tried it in one of our old riding lawnmowers, that had been hard to start and ran rough. Just to see if it would do anything. Added 6 ounces to the fuel and the engine ran like new. Blown away with the result.

clean system and smooth performance

Schaffer has been the only oil I have used since I first bought my new car. And this additive is used for when I use E85 in my WRX. Very noticable effects in performance and MPG. Highly recommended

It has dramatically improved throttle response and eliminated high rpm sputter on my 99’ 4Runner! I get about an extra 2 miles per gallon if driving reasonably responsible.

Great products, I love how well this works as a maintenance item. I have used it on many of my of my vehicles for years!