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30% Off Online Orders of Select Parts and Accessories. Enter Promo Code PEP30 in Cart

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30% Off Online Orders of Select Parts and Accessories
Receive 30% Off Your Online Purchase. Use promotional code PEP30 at checkout to receive discount. Not valid in combination with any other discounts or promotions. Not valid on gift cards, special orders, installed merchandise, commercial or fleet purchases. Excludes the following categories: Tires, Wheels, Batteries, Powerstop Brake Kits, Oil, Antifreeze, Refrigerant, Truck Boxes, Vent Visors, Bug Shields and BRANDS: Razor, Traxxas, Superchips, Hypertech, Edge, Bully Dog, Diablo, Edelbrock, Holley, NOS, Proform, Specialty Auto, Thule, Autometer, Accel, K&N, Kenwood, Pioneer, Sony, JVC, MSD and BBK Performance. Valid online until 2:59 am EST on 10/27/16. Online orders scheduled for in-store pick up must be completed by closing on 10/26/16 for discount to apply.

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  • Part #: 10406|
  • SKU: 8565736

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    • Boosts Power
    • Improves Gas Mileage
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104+ Octane Boost 16oz 104+ Octane Boost

104+ Octane Boost was America's first Octane Boost, created in 1975. 104+ Octane Boost will improve your mileage and boost your power.
  • Boosts Power
  • Improves Gas Mileage
  • Cleans Fuel Injectors
  • Reduces Knocks, Pings and Hesitation
  • Safe for Catalytic Convertors and Oxygen Sensors
  • Treats up to 18 gallons


Rated 4.3 out of 5 by 49 reviewers.
Rated 5 out of 5 by Nice boast Product performed well and was clean burning September 27, 2016
Rated 5 out of 5 by Good fuel additive I have a 1969 Camaro with a relatively higher compression ratio engine that I like to use this in. I don't have any detonation so I'd say it's helped the fuel. [This review was collected as part of a promotion.] August 19, 2016
Rated 2 out of 5 by Unsure of its purpose Octane 104 is to boost the octane level of gasoline. So I did an experiment by using this product in my 2005 BMW which requires 91 octane fuel. I added 104 before I filled up the tank with 87 octane gasoline. I assumed that this product would increase the octane level to 91. I checked my fuel economy after I burned through the tank and found that my MPG was less than comparing it to using 91 octane fuel. I concluded that this does not give enough of an octane boost to replace the use of 91 octane fuel. [This review was collected as part of a promotion.] August 17, 2016
Rated 4 out of 5 by Worked Great for Me I received this product at no charge in return for an honest review. I used the product in a tank of gas in my truck just prior to towing a 12 foot trailer full of furniture. I use 87 octane unleaded in my high mileage truck and typically get some knocking during acceleration, particularly when towing. I towed the full trailer about 200 miles and never experienced any knocking. In fact, the truck seemed to accelerate stronger and more smoothly with the 104+ Octane Boost added to the tank of gas. Not sure I would use daily, but for towing and other harder driving it makes a difference in performance and even gas mileage. [This review was collected as part of a promotion.] August 9, 2016
Rated 4 out of 5 by It works I like to experiment, so I put 2oz. of the 104 Octane in my lawn tractor 1 gallon tank. It ran better than it has in years - (15 yr old). [This review was collected as part of a promotion.] August 2, 2016
Rated 4 out of 5 by Octane Boost works! Wow! My ZZ4 (355HP 350 SB) would ping even on 93 octane gas. There's no ping after adding Octane Boost. I would like to see a better dispensing method as my tank fill location is in the bed of a (street rod) pickup and it was difficult NOT to spill when adding it to the tank (maybe a flip-top squeeze cap like syrup bottles). [This review was collected as part of a promotion.] July 19, 2016
Rated 3 out of 5 by It's gettin there Following the directions I poured the contents of the bottle into the almost empty tank of a 2004 Cayenne. The engine has been a bit rough idling and at speed for about a month and I was counting on the 104 to clean up the system a bit. Drove for about 150 miles and at the end of the trip the idle seemed to smooth out ever so slightly but I didn't really see any added benefits to performance or mileage. I would have to try another bottle to see if it continues to improve idle and or performance. [This review was collected as part of a promotion.] July 12, 2016
Rated 5 out of 5 by use it in everything 104+ will work well in anything , we used it in the dulley to the lawn mower and it worked great. Everything ran much better. Will keep using. [This review was collected as part of a promotion.] July 11, 2016
  • 2016-10-20 T08:37:08.375-05:00
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