What Customers Are Saying About Our Hy-per Fuel Complete System Cleaner


We’re proud to offer the best fuel system cleaner on the market with our Hy-per Fuel Complete Fuel System Cleaner. This PTEN Innovation Award-winning product is designed to improve gas quality by increasing cleaning ability & lubrication, removing contaminants, reducing spark knock, and helping to prevent fuel from going bad. It also increases mileage and performance, no matter what you drive. With gas prices where they are now, that’s never a bad thing. 

But don’t just take our word for it – listen to what some of our customers are saying:

For over 100 years, our chemical engineers have been perfecting our automotive solutions through innovation and iteration. This has allowed us to create some of the best gasoline additives on the market. Our Hy-per Fuel Complete Fuel System Cleaner offers several benefits:

  • It cleans: Our product is formulated with powerful cleaners that remove any dirt and contamination that had entered your fuel system. This includes your fuel tank, lines and injectors. Once removed from your system, these contaminants are broken down and pass through the combustion process to leave your fuel system clean with no deposits or build-up.
  • It improves: Rislone Gasoline Fuel System Treatment improves the quality of gas by increasing its cleaning ability, adding lubrication, removing contaminants, reducing spark knock, and helping to prevent the fuel from going bad. Simply put, it is the best all in one gasoline fuel additive money can buy.
  • It protects: We’ve taken care to engineer our gasoline engine additive to not only clean your fuel system and allow for improved performance and efficiency, but also help keep it clean. You’ll be protecting your fuel system for the long-haul and working to increase the longevity and dependability of your engine. Start now with your new car, as well as your older vehicles.

We’re convinced that we have the best complete fuel system treatment on the market, thanks to the positive feedback we have from our customers around the world.

Here’s another one.

Below is Bob G. from Rogers, AR. He recently sent us this testimonial. It’s important to note that Bob calls himself “Mr. Negativity” because he’s a self-proclaimed cynic, and he’s also a Six Sigma Black Belt. In other words, Bob is one of the toughest, smartest, most skeptical customers around. His review:

My friends and co-workers look to me when they need a logical straight forward position as to why urban myths in life and the workplace are not true. I am a skeptic and often referred to as “Bob Negativity.” I believe in fact(s), not opinion and am a Six Sigma Black Belt. Enough said about proving what a cynic I am.

I have tried many types of fuel system cleaners, probably everyone at least once. After I refill the tank, the improvement is gone along with the octane bounce in the additive. I had not seen your Rislone 2 part Fuel System Treatment (4700) until 2 weeks ago. I thought at least I would get an octane bump and this would be the last treatment attempt before I purchased new injectors for my 2004 Excursion 5.4L Gas engine. It just ran rough, idled poorly. (Forget gas mileage, it’s an Excursion.) I had 1/2 a tank of gas (22 gallons) and I poured in one bottle and within 10 min. of driving the engine with 170K miles of powering my overweight beast suddenly ran smooth.

Again, allow me to re-introduce myself: Bob Negativity.

Two tanks of gas later (sadly 10 days), the engine is still running smooth, and idle is like new. THIS IS SIMPLY THE BEST FUEL SYSTEM ADDITIVE I HAVE EVER USED! I will be treating my 86 300E, 99 Taurus Duratec, 93 Mustang Conv., 04 Pacifica next week. I believe quality is not an accident–it only occurs with care, attention and proven controls in place. I am now going to buy 4 bottles of your 4401 “Zinc oil treatment”. This time with the trust of knowing you are a quality company. Based on the performance and price of the product may I add lean.

Sincerely, Bob “Negativity”, your new loyal customer

We weren’t the first company in the fuel treatment game, but when we realized how ineffective most of the products on the market were, we created Rislone Hy-per Fuel Complete Fuel System Cleaner. While other products need to be used frequently, we recommend using this every 3K-5K miles, depending on your driving conditions.

Questions or Concerns?

We have a US-based customer support team with real humans ready to help you M-F, 8 AM – 5 PM EST. No long menus, no automated bots. You can contact us here via web, or call us at 800-345-6572 and we’ll be happy to help. You can also message us on Facebook if that’s more your thing.