505 CRF Fuel System Treatment, 16 fluid ounces

I have a 2017 ford Explorer with 104K miles, my independent mechanic said I may have a transmission issue, I immediately bought this product drove my car for about 30K miles and took it into the FORD dealer for a diagnostic. They concluded that I did not have a transmission issue! after putting this product directly in the fuel tank, my cars accelerates smoother and it just feels like a you're driving a brand new car! This stuff works! I am sure that it cleaned out the carbon deposits as it does feel smoother when driving it. I will definitely keep buying this product as I plan to add to my car every 6 months!

This product woke my car up!! I have about 90,000 on a Honda accord which runs great. But after putting this in the fuel tank she runs smoother and the gas mileage has increased. This stuff works.

I have used this fuel system cleaner before and it works very well. I have an old Camry and it smoothed out a rough idle. Every 6 months I throw in a bottle . My car has over 200,000 miles on it so I’m sure the fuel injectors have some restrictions , but this additive does the trick. It’s not cheap, but does a good job.

I bought this for a Hyundai Tucson which is known to consume oil and cause carbon buildup regularly. In October 2024 I went to Kia for their $700 engine clean out which did make it better but was still stuttering and consuming oil. I bought this in January 2025 and have drove the car 2,000 miles. The car has not hardly consumed any oil which the dealership said could happen with their product. This tells me this product has worked well cleaning the deposit buildup and the car has since ran smoothly. I can’t say it’s increased the MPGs much but it definitely worked. I also used it on my 2021 John Deere mower which was having a rough idle. It has also worked on it stopping it from revving while idling. The only problem I have with this product is the cap was broken from shipping and a couple ounces have seeped out. The company wouldn’t let me return it which was frustrating to pay so much per ounce and lose some of it. But still I highly recommend it and I will use again.

Item was a bit damaged & took longer than usual to arrive. I think it was due to bad weather. But I added 3/4 of the can to my 07 VW Mk5 a couple days ago. I haven't gave my car a tune up yet as I wanted to 1st add this to see the difference. I'm a 1st time user. Well my car would not start in mornings & occasionally when I start it but now soon as I crank it it starts. Also my motor feels much more responsive & much looser, smooth.! This stuff I was Leary about but it really made a drastic difference! My car has 195k. Feels like a newer modern vehicle as after installing all the suspension, front end steering & bearings then I waited to add this CRF solution, it really did make a huge improvement! My g- thought I gave it a tune up as I still haven't installed electric coils & plugs, doing next week. This stuff works!

I was very skeptical on how well this product would work. Sounded too good to be true, and was a bit pricey. I have a 2005 Ford Ranger with 100K on it. After the second or third tank, I definitely could tell more horsepower and better performance. I live 11 miles out of town , and it is quite hilly going into town. On several steeper hills, I always had to downshift. On these hills now, I not only can stay in the same gear, but can actually accelerate slightly. Totally satisfied, and will probably do another bottle in a year or 2.

My Cummings Diesel loves this stuff, the fuel mileage went from 17 to 20 mpg, and I can feel the extra power from cleaning the injectors.

No major changes in gas mileage