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๐ Clean systems, clear codes, and unstoppable drives!
CAT Complete Fuel, Exhaust & Emissions System Cleaner is a powerful EPA-registered formula designed to deep-clean fuel injectors, catalytic converters, oxygen sensors, and exhaust systems. Compatible with all major engine types and fuel blends, it boosts power, mileage, and fuel economy while preventing costly repairs and clearing check engine light codes like P0420. Regular use ensures your vehicle runs cleaner, greener, and smootherโperfect for professionals who demand peak performance and reliability.






| ASIN | B08SPVQJ6J |
| Best Sellers Rank | #7,528 in Automotive ( See Top 100 in Automotive ) #25 in Fuel System Cleaners |
| Brand | Rislone |
| Brand Name | Rislone |
| Contains Liquid Contents? | Yes |
| Customer Reviews | 4.1 out of 5 stars 1,267 Reviews |
| Included Components | Rislone Cat Complete Fuel, Exhaust & Emissions System Cleaner |
| Item Type Name | Rislone Fuel, Exhaust & Emissions System Cleaner |
| Item Weight | 1.08 Pounds |
| Manufacturer | Bar's Products |
| Model Number | 4720 |
| Number of Items | 1 |
| Part Number | 4720 |
| Recommended Uses For Product | Fleet and plant maintenance. |
| Size | 1 Count (Pack of 1) |
| Special Feature | 50 state legalโEPA registered, Clear OBD P0420 & other OBD codes and turn check engine light off., Deodorizes sulphur โsulfurโ (rotten eggs) exhaust smell., Pass emissions smog test, guaranteed. Special Feature 50 state legalโEPA registered, Clear OBD P0420 & other OBD codes and turn check engine light off., Deodorizes sulphur โsulfurโ (rotten eggs) exhaust smell., Pass emissions smog test, guaranteed. See more |
| Special Features | 50 state legalโEPA registered, Clear OBD P0420 & other OBD codes and turn check engine light off., Deodorizes sulphur โsulfurโ (rotten eggs) exhaust smell., Pass emissions smog test, guaranteed. |
| Specific Uses For Product | Fleet and plant maintenance. |
| Surface Recommendation | Miscellaneous |
| UPC | 078615047208 |
| Unit Count | 1.0 Count |
| Warranty Description | See Manufacturer |
A**.
Product failed miserably - EDITED
Not much else to say, there. I followed the directions to the letter (driving more highway AND city than what's instructed) and P0420 remains on the OBD. I've been told now by two very experienced mechanics that these products rarely work - after now trying both Cataclean and this one, I now understand why they say this. EDIT EDIT EDIT!!! Just changed to 5-star because, although it took driving the car beyond what the instructions say, it has worked perfectly. P0420 is now gone, vehicle passed state inspection "with flying colors" and registration is complete. Key take-away: Give this more time to work if it doesn't do the job right away. I did nothing different - same gas as always (I fill up with Chevron or Texaco almost every time as they include Techron in their gas and my former racecar driver brother-in-law says that's the best). I do also add a bottle of Techron on occasion to give an extra "boost" to the cleaning power.
E**C
Follow the directions! Worked great for small car/tank
Rarely leave reviews but this stuff worked for me! Vehicle renewal coming up and CEL had kicked on, it's been weird kicking on and off for a bit but always reading the same code and having no changes in performance/mileage but this time it had been on for a bit. Was getting worried with the renewal coming up so soon and tried this on a hail mary and it worked. I have a small tank (9.2 gal) so I'm wondering if the higher concentration helped in my case. I followed the directions to a T, added stuff to a half tank, did some good speed highway driving and then some in city start/stop for the 20-30 miles they recommend. I felt like going 30 is better because the concentration of cleaner/gas is higher at this stage so you're using that treated fuel. Then I filled the tank and drove roughly 30 more miles of mixed driving, got home light still on. Later went to grab some takeout, started car and light turned off! I turned car off, took wifes car to get the food and first thing this morning drove to the inspection place and passed I'd say follow the directions to a T but also lean towards whatever leaves a higher concentration of the cleaner. I also used Premium the entire time for everything. I had even filled a tank of premium before all this hoping it might clear. The car also seems to be running a little more quiet and smooth right now
S**Y
Pleased with product
I am a 69 year old that drives a 2007 honda fit. 8 days ago my check engine light came on. I took my car to auto zone where my car was diagnosed with code P0420. My car has 136,000 miles I did not want to invest thousands on a fix. I have used Rislone products before and trusted the brand. I had just filled my tank so i had to wait to use the product. 2 days ago I used this item as directed. The check engine went off, before I even got home and has stayed off. I am very pleased and will update after a month or if the status changes. I recommend trying this first before replacing other costly parts. I am at 1/4 tank of gas and have just over 280 miles driven on this tank of gas.
D**E
Too Early To Tell
I have P0420 codes every month or so. Added this, and so far, 300 miles later, no codes. Time will tell.
A**R
Cost engine heat up
This product is not working at all it damaged & clogged radiator I advise do not use it
C**N
It may help
Used it per directions. Light went off for a tank or 2 and then came back on. Easier to pour in the tank than to try and replace cats. It may work in some situations but in mine it was short lived.
M**S
Worked
Made my car run better
M**D
Recommend
Passed nys inspection with this great product, 2012 honda accord with p420 code ๐ฅฒ follow instructions and youll be good!
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E**M
Cleared engine light! Definitely recommend
I had an engine light come on in my 3010 Honda Accord. OBD2 scanner said it was a catalytic converter issue. I put this into my gas tank when it was about half full. After a few days of driving, it fixed it and the light is off. I've done this once a year for 2 years and it keeps working. Love it as a cheap way to prolong the life of your old car!
A**R
Good product
Best !! Engine light is gone now. Itโs a been a week and I am not seeing the Engine light anymore ๐
H**.
Don't weast your money
Does not work for me, and no guarantee as the described
M**N
It does work
I said I would write a follow up. Put in around Christmas see review. Have now put about three tanks of gas through pickup truck. No codes have come up since. So would say it well worth buying. I had all sorts sorts of codes showing up turning on eng light had to clear every 1/2 tank.
Trustpilot
2 months ago
1 day ago