I have a 91' that supposedly can use regular fuel. Was out in the boonies and really needed gas but didn't have what I preferred. I recall the manual didn't say I needed premium so I got what they had. Good thing I have some paranoia about stuff and had a bottle of this in the glove for emergencies. The next start the car ran rough and struggled to idle. Poured this in and cranked it. It took some throttle to get it sputtering but once the crap gas passed thru the line, the idle evened out. I figured booster ups the rating a couple numbers or maybe 3 (87 = 89 or 90) so it was close enough to stop the hiccups. This stuff worked. I ordered more so I have a spare in the glove again and one in my garage. Read more

I've used the Rislone Hy-per Fuel Octane Booster a few times now, and it has made a noticeable difference in my car's performance. It's easy to use and has helped improve fuel efficiency. Highly recommend for anyone looking to boost their fuel octane rating. Read more

Gasoline is expensive and so are octane boosters! For the price point, this is a good value. This product treats 20 gallons with a octane increase of 2 points. I use this in a 5.7L Hemi with 282,000 miles on it. Give it some time. I sense it works well. Quick start ups,acceleration, smooth idle. Gas mileage increase, not so much. Read more

This stuff works great! Read more

The Ruslone Octane booster is the cats meow. Its more cost effective than auto parts store boosters, actually raises the octane 2 full points (ex. 87 to 89), and is well worth it. Go to their site and itll explaine more and with next level detail. And yes, I read it. I drive a HEMI powered vehicle. The manual recommends 89. 87 octane is $.40/gal or more cheaper. At the time of writing this octane booster is 2.56. I put 20 gal in at a time of 87 octane for an average price of $90. At 89, my wallet is hit for over $100. The additional cost of the booster still keeps me under $100 per tank... for now. What is the performance value? My truck runs a bit smoother and has a 1.5 mpg increase in economy per gallon. Getting 15.4 over 13.9 mog adds to the overall value of this product. I will continue using the octane booster. Thank you Rislone for making a product worth my time. Read more