Rislone 4700-4 PK Complete Gasoline Fuel System Treatment 15.5oz (Pack of 4)

This is one of the few additives I've used that actually works. I could feel a difference in both cars Sienna and CX-9

This fuel system cleaner really makes a difference — smoother acceleration, better performance, and great value in a pack of four. Easy to use and keeps the engine running at its best!

I've used Rislone products for years, in my Nissan, Jeep, 56 Chevy classic, & my Corvette 645hp muscle car classic from the past, & I have had nothing but good experiences with them. You can't go wrong with Rislone! Update, it's so good, I'm ordering the 4 pack again, 7-18-26 especially for my 1956 Chevy 350ci, & my 2002 Corvette Z06, 645 horse, muscle car, but I'm going to drop a bottle content into my Jeep Wrangler, & Nissan. Love the stuff.

It can be tricky getting it into the gas hole. My '08 6 cylinder Merc seems just a little better after I treat about 15 gallons of gas. My fuel economy is too variable on this car to comment on this aspect. I don't believe any treatment will change the feel in the seat for performance. It may reduce idle vibration and studder during accellerating. The whole idea is keeping a good spray pattern at the injectors. There are other items you should also consider manually cleaning like throttle body. I have always liked their Engine Treatment, so I have stayed with the same brand for fuel nozzles.

I commute 15 miles each way to work five days a week in my VW GTI. This fuel cleaner is one of the best that I’ve used. There is a noticeable difference in exceleration and power. I try to use it with every other gas refill when my tank is about half empty. If I don’t use it I’m able to tell the difference in performance. However, I can’t really tell the difference in gas mileage consumption because I’m kinda heavy on the pedal on the highway. (I’m use to autobahn driving) As I’ve notice, this car is meant to be driven and performs great at high speed.