ATS Chemical 505 CRF Fuel System Treatment, 16 fluid ounces

I don't often give 5 star reviews. 505 CRF is expensive: $50/can. I have a 2016, Toyota, Tundra, 5.7L engine, SR5, Crewcab, 4D Direct Injection . I bought it 2019 with 62,000 miles on it and now have 133,000. I really like the Tundra. In all that time, from a dead stop at an intersection, on dry pavement, it's never spun the tires enough to trigger the traction control feature. I put 1 can of 505 CRF in 16 gallons of fuel and within 50 miles of driving I could feel significant acceleration improvement. After 150 miles of driving I noticed the rear tires squealed at a dry intersection from a dead stop. Better gas mileage, I don't know. I haven't driven it enough to find out, but way more power. I do my own maintenance and I've been adding a can of fuel injector cleaner every oil change. I've shuffled between brands because you can't really tell if they make any difference. But, 505 CRF made a huge difference so I'll add a can every other oil change from now on. Here's my maintenance schedule if your interested in what you should be doing to your vehicle. Every: NEXT: • Oil & Filter: 5,000 137,000 last 11/1/25 • 505CRF Injector cleaner 10,000 142,000 last 132,000 (505CRF - $50/can) • 505CRO engine cleaner 15,000 152,000 - idle 15 minutes, then change the oil/filter • CV boots, inspect 5,000 137,000 • Spare Tire pressure 5,000 137,000 45 psi • Radiator Hoses 5,000 137,000 Inspect & squeeze for firmness • Antifreeze level 5,000 137,000 pg 7 (HOAT only do not mix with OAT) • Windshield wiper fluid 5,000 137,000 - Winterize -20oF, Rain-X • Wiper blades 5,000 Replace every November before winter. • Battery – take a look 5,000 137,000 5/24/24 27F-780/930 780 CCA Allpak, $119.95 • Serpentine Drive Belt: 5,000 137,000 – Inspect • Tire tread & wear 5,000 137,000 – all 4 were 8/32 • Tire pressure 5,000 137,000 38 psi • Grease driveshaft: 5000 137,000 – 5 zirks see Pg 12, #2 up toward LF tire. • Rotate Tires, 5000 137,000 - 7/8” socket 97 ft.lbs • Inspect Brake shoes: 5,000 137,000 • Shocks: 5,000 137,000 125,000 RF may be leaking oil • Front end Alignment: 10,000 147,000 • • Transmission Fluid 30,000 156,000 – Just dump & refill, 4 quarts (measure amt • Air Cleaner Filter: 30,000 150,000 – check/replace? • Air Conditioner Filter: 30,000 150,000 – check/replace? • Brake Fluid: 30,000 150,000 - flush • Radiator Flush; 50,000 150,000 - replace hoses • Power Steering Fluid: 60,000 150,000 - flush • Transfer Case: 60,000 150,000 - flush • Rear Differential: 30,000 150,000 - flush • Front Differential: 30,000 150,000 – flush • Wheel Bearings 30,000 150,000 – inspect for play and noise • Front Rotors 150,000 replaced 106,400 • Front Brake Pads 150,000 – check/replaced 93,700 • Rear Brake Pads 150,000 – check/replaced 93,000 • Rear Shocks: 40,000 150,000 – replaced at 112,000 • Front Strut/Shock: 40,000 150,000 - checked by Toyota dealer at 112,000 • Spark plugs: 120,000 250,000 – replace

I bought this product based on recommendations on YouTube by car mechanic Scotty Kilmer. I have a 2006 a Toyota 4Runner 4WD V6 Sport Efition with 198,428 miles on the odometer. I have always maintained it meticulously but as I neared the 200k mark I wanted to run something a lot stronger than the usual GUMOUT fuel cleaner to see if it might remove any deposits accumulated over 20 years of driving and further smooth out the idle on this engine. The bottle is a tad hard to open, so you should open it indoors first with whatever you need to open it without spilling any of this VERY EXPENSIVE cleaner. Then re-cap the bottle and take a clean automotive funnel with you to add it to a FULL TANK of premium gasoline. (I filled up with the Super grade of Chevron Techron gasoline.) Once I filled it up I let it sit and mix with the fuel overnight so it could already start cleaning deposits in the gas tank. The next day I went on a 280 mile highway road trip and I made sure I operated the engine at a variety of speeds and gears through the day with several 30+ minute runs at 3,000 to 3,500 steady R.P.M.’s. I also did some hard accelerations to simulate passing situations to try to blow out as much gunk as possible. The engine would rev up between 5,000 to 6,000 R.P.M.’s briefly as it downshifted to accelerate. I also did some low speed driving as well during that run. By the end of the day I burned up about 15 gallons of treated gasoline and it really did the trick. When I got home I re-filled the gas tank with Shell high octane premium gasoline and over the past week I’ve been well pleased with how smooth and responsive the engine performance feels and it seems to get smoother by the day. I also did an immediate oil change which I personally performed a few days after doing the 505 CSF treatment. This allowed any dissolved gunk to be drained out with the old oil. I then re-filled the engine with Royal Purple HSX High Mileage Premium synthetic oil and a reolaced the oil filter with a high-end WIX filter that is engineered to work well with synthetic oils. This is the proper way to go about things if you want to keep your high mileage engine running smoothly. It also helps to change oil religiously every 3,000 miles or 6-months, whichever comes first. Anything longer than that is a false economy that leads to premature engine wear and eventual expensive vehicle replacement. Take good care of you engine and you won’t regret it. I’m happy with the 505 product and would use it again if I felt it was necessary, but I sort of doubt it will be. One time use at 200,000 miles is just a great way to put a little pep back into a high mileage motor and to help extend its potential life a bit longer before a rebuild is warranted.

Wow! This stuff is amazing! I have a 2016 Ford F150 with the 3.5 EB. I was averaging 18 - 20 MPG most of the time. Of course much lower when towing a large trailer. The TPS was replaced last year and i noticed my gas milage dropped to 13 - 15 MPG for over a year. The dealer that replaced it said everything was in spec with the replacement so I didn't go any deeper with it. I saw a review on 505 CRF Fuel System Treatment and figured why not give it a try. Even though it's pricey I bought a bottle. My truck has a 36 gallon tank so I waited until it was down to 1/4 tank before adding the 505. Even using a funnel half the can ran down the side of my truck trying to get it past the POS system in the filler neck. I drove around 30 miles with the truck in 3 rd gear at 50 - 60 MPH. 3000 - 3500 RPM. At the end of the drive I was back to 18 - 19 MPG. I was really sur[rised that a fuel additive could restore lost MPG like this. Imagine if the entire bottle made it into my tank! Bottom line, this stuff works!

functioned as it should

UPDATE: 06/06/2026, As promised, here is my update. This stuff works, I mean really works. I finally added this to my car at half a tank, drove fast and WOW, do I feel the difference. The car has so much more power now. It removed my rough idle and engine hesitation. It's all gone!! Seriously, this works. Amazing. I will add this in my car every year. It's well worth it. My idle in my car is rough in the mornings when I first start my car. I researched online for weeks to find a solution. I came across this product. My gas in the car is 8 years old because my car was in storage, and I cannot drain it out. This was recommended to me from YouTube, Scotty the car guy and from Royalty (Sherwood) auto care. They said they use it in many cars, and it works. It removes and cleans the carbon from the engine, injectors, fuel tank, valves, intake manifold, spark plugs, etc. I just bought it and will add it to my car soon. I know it will work especially for the price. It is very expensive. I read online that this stuff really helps with rough idle which I have in the mornings only. ATS does make the best treatments. I used them in the past. I will update my post once I use it.