ATS Chemical 505 CRF Fuel System Treatment - 16 oz Powerful Carbon & Injector Cleaner for Gasoline & Diesel Engines - Help Boost MPG, Restore Power, & Reduce Emissions - Easy Pour Bottle

It’s only been a week but it worked great. My car was idling a little rough and my mpg was usually 25-26 mpg and it had went down to 20-21 mpg but after 1 day it’s back to normal and driving smooth. If it continues , i will make this part of my yearly maintenance.

How I used the product: I poured entire contents of bottle into a 2012 Toyota Camry Hybrid XLE. The car had roughly 12-13 gallons of gas when I used it. I drove mostly normally, but used engine braking to increase rpm downhill or whenever possible. It took roughly 1.5 weeks for the fuel containing 505 CRF to be used. Why I purchased the product: I mainly purchased the product as a way to fix what I felt like was throttle lag. The acceleration felt weak. Fuel economy was also a consideration on the value of this product to me. My concerns: I was skeptical of this product working due to my car being hybrid. Within the past 2 years I have also changed my Hybrid battery and noticed better fuel economy with that, but performance was still lacking in my opinion. What I experienced with CRF 505: At first, I didn't notice any changes. Not for several days driving. The car still felt "squishy" as it had been. Then somewhere between 1/2 and 1/4 it starting feeling much more responsive. The acceleration is smooth, fast, and stronger than ever. The car went from being a bit of a chore to drive to becoming fun. It feels much safer to have the car be responsive to my controls. Gas economy(full transparency): I am sure many people that get product's first concern is if this will generate enough value from the save fuel economy. I don't have enough data currently to be conclusive due to several factors such as: I haven't had fuel filter cleaned, I haven't driven a full tank of since using the product, I rely on the mpg avg display which can be off several percentage(even -/+ 5% is the difference between ~4mpg in a Camry), and driving style(due to difference in acceleration driving is slightly more "aggressive". My opinion(Should you use it): I am more than happy with my purchase. The product did what I wanted it to do. The performance improvement alone is enough Value for the Money for me, and any fuel economy is just a bonus. I believe that if I had used it on 5-7 gallons of gas it would have probably helped the fuel economy more than me using it on >12 gallons. The only reason I would have to not buy the product again: It worked correctly the first time! Follow up plan: My follow up plan is to follow this up with occasional fuel treatment using Marvel's Mystery oil, and to pay attention to my mpg to see if any changes.

The only additive that actually works, I had a misfire on my 2019 ram 1500, ran this through my fuel tank as recommended and no misfire plus better fuel economy. Doesn’t get any easier to use, just pour it in your tank when you fill up. Works in any car out there.

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.

Best fuel treatment I've ever used! My 2002 Crown Vic shows a truly noticeable improvement in performance with use of this product! Only drawback is the price but not reason enough to remove stars...lol

Recommended by Scotty Kilmer and he’s my go to for auto info. This treatment (and the oil treatment too) is absolutely the best. I will continue to use it! My 16 year old Lexus runs smooth and I saw an impressive increase in gas mpg. Well worth it.

Expensive!! But I run a total of SIX 2024 Cadillac Funeral coaches “Hearses” , Hearses are strictly a ceremonial vehicle. They are only used to transport deceased persons in a casket from a chapel to the place of burial and then they return to the Mortuary. We use plan white unmarked cargo vans to retrieve the deceased from the place of death. The average mileage for a hearse is around 3000 miles per year. The cost is included in the “One price, all inclusive” package the families chose but it amounts to $375 flat rate. A new Cadillac hearse now costs about $180.000 when they are built to our specifications. Three way loading, power casket table, police suspension with double batteries, front and rear Air Conditioner, six lug wheels, run flat tires, rust proofing, etc. Hearses are not made by Cadillac. Never have been. They are made by several different coach building companies (Superior, S&S, Federal, Krystal, Miller-Meteor, Eagle, etc.) they receive the front of a new Cadillac Fleetwood sedan, built only from the tip of the front to the front seat. Including everything you would find in a Cadillac sedan, dashboard ,controls, steering wheel.. everything! Behind the front seat, you will find nothing but a General Motors pick up truck frame. The coach builders hand fabricate everything else. Rear door, side doors , Tall glass throughout . We ABSOLUTELY must render a 100% Flawless service! No excuses! Using this product addresses the problem of sludge and carbon buildup! No more rough running vehicles! And $1200 trips to the dealer. We also add a can after every oil change (1000 miles) when we have the chance we allow an employee to drive the vehicles out on the Interstate and maintain a high speed for a few minutes.

First off, this is the second time I ordered this product but the first time I actually received it. Last time I never received my order and had to be refunded. Credit to the seller this time it arrived exactly as stated within two days. I tried to leave a bad review last time, but Amazon would not let me do so. Now for the product review itself. I'm sure most of us are here because of Scotty Kilmer and his praise of "Bernie's Cleaner" and so far, so good. Being it's only been one day. I did exactly what Scotty recommended after pouring the CRF fuel cleaner in my gas tank. I drove it around for about 40 minutes with the rpm's between 3500-4000 keeping it in 2nd or 3rd gear the whole time. My car is a 2007 Corolla with over 200,000 miles on it. I'm the second owner and I got the car from my aunt when she passed away, she bought it new. For years she had a problem with the cars long term fuel trim percentages being over 30 tripping the check light or "MIL" and giving a code P0171. Most of the time for this particular code it's the intake manifold gasket sucking in or allowing too much air into the system, but she already had the gasket replaced. So, I did the usual tests, 02 sensors, fuel pump pressure, exhaust manifold cracks before the 02 sensor ect... With no luck, I wanted to try the Bernie's cleaner, but I like I said I never received it, so I opted for some Royal Purple fuel injector cleaner which Scotty actually used on a Corolla in one of his videos. It actually worked for about 7 months but then the MIL light came back on. Today is August 31, 2025, I got the cleaner yesterday poured it into the car with about 1/4 tank of gas. I drove to the gas station, filled the car up with 93 octane and drove it around. Before doing so, I wrote my mileage down and checked everything with my ODB scan tool. I watched the live data as I drove around for the 40 minutes and the long term fuel trim went down from 34 to 25 by the time I got back home with the short term fuel trim reading around -1.6 and currently no code or pending code. Now that was with just one day and 40-60 minutes of total drive time. I plan on doing the same drive cycle today once the rain lets up and I will update this review as time goes by. I hope this helps others in deciding whether or not to try this product. As of right now, today, I would recommend it. But only time will tell.