Rislone 4747-12PK Super Concentrated Octane Booster, 6. Fluid_Ounces, 12 Pack , yellow

I decided to purchase for my 2025 Ford Ranger Raptor to determine if I could tell a difference in horse power performance, even though I added a performance calibration computer program along with a Process West enlarged air box, to include the 3.5" cross over pipes to allow the turbos to really breath. My comments of the product are not based on anyrecent Dyno testing. I added one bottle to each of the 5-full tanks of gasoline of Sunoco 94 octane fuel. I did this to give the computer to evaluate and "learn" the fuel mixture change. On the 5th full tank full, I added one bottle and hit the road and accelerator. Truly I was shocked that the product made a noticeable change I could feel from behind the wheel. Both from a full throttle start, highway throtle punch and residential road driving acceleration. Again, not a dyno test but if I can edge out a noticeable difference, that's all I was l99king for. Without any details, I must have surprised drivers in their modified vehicles in the performance of this mid-size pick-up when I pulled away in small level straight and drag racing situations that arose. Additional performance parts will be added in the very near future but at least the gasoline octane booster proved its point to me.

Price of premium gasoline is skyrocketed recently, so I tried this additive with regular gas. Car is turbocharged and designed to take premium only, but with this mix it is working surprisingly well. No knocking, power is good. It is too early to tell if gas milage is improved, but so far it looks promising. If price on this booster stays, it is possible to save 5+ dollars per 15 gallon tank with the switch from premium to regular gas.

My car needs high test gasoline which is usually $1 more per gallon. These allow me to use regular and save $10-15 per fill up.

This really works. I absolutely love this stuff, because I get an extra 2 to 3 mpg per tank using it. Unfortunately, as the price continues creeping up and up, the sellers, or the manufacturer, or someone out there needs to realize it's becoming more and more likely that I'm going to reach for the "Super" pump. When the cost starts to negate the benefit, I'll stop using this, and start using the 93 pump instead. Luckily, the last I ordered, it was still under $40 for a 12 pack. That was less than 2 months ago. Now it's almost $50. I can't recommend it as highly as I once did because of the price increase.

The item original box was packaged upside down inside of a box with arrow pointing the wrong direction. Some leakage occurred. This is an excellent product. My car calls for 91 octane and this raises my cars regular gas almost there. There are only a couple of gas stations that carry premium grade around my house and they charge at least 1$ more than the regular grade fuel. That saves me about $15. / Tank

they work

This Octane booster costs about 50% of what they charge at the gas station,

Nov 2025 parked 48 Plymouth coupe , GM low compression 305 running well on 9 month old 1/2 tank 87 octane 10% ethenol treated with StaBil.Minor hesitation noted. Combustion imbalance rate also. Apr 2026 uncovered outside stored coupe, added one small bottle of Risolene Super Concentrate Octane Booster and 5 gallons of fresh regular gasoline. Took the car on a 10 mile trip , at the 4 mile mark I could realize a pronounced difference in that old 305, backwoods cruising the booster was leveling the hills, by the time it brought me back to start the engine was idling smoother than ever , running stronger than when parked, standing by for another adventure through the Allegheny Platuea of Pa.

I use this religiously in all my harleys to offset lower quality pump gas. Bottle size is perfect fit for my swingarm bag. Usually get 3 to 4 fill ups from a single bottle. Won't ride without it.