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๐๐จ Unleash horsepower and silence the knockโbecause your drive deserves the best!
STP Octane Booster is a premium fuel additive that boosts octane levels, reduces engine knocking, and cleans the fuel intake system to restore lost horsepower. Compatible with cap-less gas systems, it treats up to 28 gallons per bottle and is designed for regular use to maintain peak engine performance and smoother acceleration.

| ASIN | B004MBFTYK |
| Best Sellers Rank | #46,165 in Automotive ( See Top 100 in Automotive ) #231 in Oil & Fluid Additives |
| Brand | STP |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,301) |
| Date First Available | 14 August 2012 |
| Item Weight | 155 g |
| Item model number | 78574 |
| Manufacturer | STP |
| Manufacturer Part Number | 78574 |
| Model | Octane Booster |
| Position | Outside |
| Product Dimensions | 3.81 x 5.84 x 20.32 cm; 155 g |
| Voltage | 12 Volts |
M**P
Good product
Enhance the car acceleration with quite an engien operation.
A**O
ุงูุฌูุฏุฉ
ู ูุชุฌ ุฌูุฏ ูุชูุธูู ุฑุดุงุดุฉ ุงูุจูุฒูู
F**E
Spit in the fuel tank..
Made no difference whatsoever..
S**V
Not 2 piece
Picture shows 2 but received only 1
E**N
Totally Worth It!
I wanted to take advantage of the added benefits of my Mustang running higher octane. Even though it can take your typical 87 gas, the torque curve is better with the added octane according to the owner's manual. Not sure if I noticed much of a difference at first but after my 6th or so application I certainly did. So I bought a case and now I do the monthly subscription. I definitely notice better throttle response in 4th and 5th gears. It's like she's ready to roar and what a great feeling it is when the gas peddle is that touchy in a muscle car. I think the cleaning properties took a little time to do their thing and is why I'm feeling the pep. I am a big believer in adding gas treatments every oil change to counter the crap that goes through your injectors. I don't trust gas with ethanol which attracts moisture and causes corrosion. With this product I'm getting true 2-for-1 benefits with the boost of octane and keeping my fuel system clean. Plus it's way less expensive than buying premium fuel which may or may not help with cleaning. This is a no-brainer-must-have product for anyone who needs or is able to take advantage the added octane. Only drawback is it is unknown how many points of octane is adds. It should advertise that is adds X per 10 gallons, etc.
S**N
This will NOT increase hp, torque, or speed
Do not buy this if you are thinking it will improve your vehicle's performance in some way. I made that mistake of ignorance myself when first grabbing a bottle off the gas station shelf. It likely won't hurt your engine to use one bottle per 15 gallons (they say up to 20), but it's just not what most people think it is/does. **edit*- this DID cause transmission damage, knocks, and pings on my naturally aspirated system. I mistakenly thought that my variable octane (87-93) engine and drive train could handle this change in octane. This was my mistake, I was wrong, and this shouldn't be used on a naturally aspirated engine unless the gas has been sitting for ~6 months and has gone stale. Check with your dealer about your specific vehicle make & model.* Octane boosters raise the octane level of your fuel, making it MORE difficult for gasoline to combust under pressure. They get a bad rap as they're sold as performance enhancers, or speed boosters. High-revving, high psi turbo/supercharged engines can benefit from this as it leads to increased efficiency of combustion. High-octane fuel requiring performance cars that only have access to 87 octane gas stations, or fuel that's been sitting around a few months or more can benefit from this too. You can do some research yourself, but if your vehicle does not specifically recommend using an octane booster or a fuel with octane higher than 91 or 93, then it's likely not for you. Maybe if you only have access to low octane gas, but this is an expensive way to boost it by only a little. You're way better off using 93, or 91 octane as your car will take. Using with regular gas if your car takes regular 87 octane gas will do nothing. I use it in a naturally aspirated 3.8L V6 with 104k miles and it was what was causing me knocks around 3rd gear. Typically a fuel system cleaner (and this part is important!) which SPECIFICALLY lists the detergent levels, not just the name of the chemical the detergent used, is a better bet for increasing performance, but still only by a few hp in the best of scenarios on the oldest of cars in the worst of shape over a long time after a lot of uses, and typically is only around up to 0.5hp. This one doesn't even list the detergent I don't think, just that it has 'jet fuel' whatever tf that actually is. It's not fuel for a jet, that's for sure (kerosine is what jet fuel actually is). There are way way better options for boosting performance, and I'm not sure how this would handle in a system that can't take varying levels of octane. Snake oil for many, but it does have it's uses and works for some very specific cases and again, it does not make sense to me yet why. I have some unknown issue, in a 3-year-old car with a ton of miles for the years, which can take variable octane fuels. I likely have some hairline crack in my fuel system somewhere leaking vapor or letting moisture in. **edit*- it was this octane booster which was contributing to my tranmission knocking issue. After stopping use and going down in fuel grade for a month, it's running like new again.*
J**N
From 87 to 94
If you can't afford a full tank of 94, this stuff will do in a pinch. Been using it for years and never had a pump or filter problem.
V**.
Works well and improves gas milage
I get about 40 miles more on a tank on my Volkswagen EOS 2007, so it more than pays for itself each tank.
Trustpilot
2 months ago
1 month ago