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Availability:
In Stock.
Arrives
Sunday, Nov 8
Size: 5.25 Fl Oz (Pack of 1)
Features
- Restores Performance & Treats Fuel System: This STP gas treatment works as an effective gas treatment poured directly into your gas tank to help restore lost power and acceleration during regular fill-ups
- For Gasoline Engine Compatibility:This advanced fuel additive for gasoline engines is suitable for use in cars & trucks, helping support reliable engine performance
- Cleans and Protects Fuel System: This fuel treatment includes high-performance detergents that help keep the fuel system clean while supporting efficient combustion
- Boosts Octane and Reduces Knock: Formulated to deliver an octane boost, this additive helps reduce engine knock and ping when added to your fuel tank, promoting smoother operation
- Versatile Gas Additive Solution: This gas additive helps improve MPG and restore engine performance by enhancing fuel quality and combustion efficiency
- Easy to Use No Mixing Required: Simply pour the entire bottle into your fuel tank before refueling; one bottle treats up to 15 gallons and is ideal for regular use
Description
Give your engine the boost it needs with STP Octane Booster for Gasoline. This gasoline fuel additive features MMT + Synthetic Technology to boost octane and clean the fuel intake system, helping restore lost power and acceleration. Use it as a gasoline fuel treatment during car maintenance before road trips or long-distance driving. Compatible with cars, trucks, SUVs, and all gasoline engines, including cap-less gas systems, STP Octane Booster raises octane levels to reduce knocking and pinging caused by combustion chamber deposits. This fuel system cleaner helps improve fuel flow and combustion efficiency for smoother acceleration and increased horsepower. Drivers and car owners can keep it in the garage or add it at the gas station as part of their routine. Made with jet fuel, a high-quality carrier of active ingredients, STP Octane Booster helps improve MPG by optimizing fuel use and reducing engine strain. One 5.25 fl oz bottle treats up to 15 gallons of gasoline.
Manufacturer: STP
Brand: STP
Model: 78574
Item Weight: 4.9 ounces
Product Dimensions: 1.5 x 2.3 x 8 inches
Item model number: 78574
Exterior: [[Not Applicable]]
Manufacturer Part Number: 78574
Position: Outside
Voltage: 12 volts
Date First Available: February 4, 2011
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Nov 8
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Size: 5.25 Fl Oz (Pack of 1)
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.*
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Reviewed in the United States on December 26, 2022 by Snake Plissken
Size: 5.25 Fl Oz (Pack of 1)
Great additive to vehicle.
Reviewed in the United States on April 6, 2025 by reginald f.
Size: 5.25 Fl Oz (Pack of 1)
seemed to work. used monthly to hopefully keep fuel system clean, was a subscribe and save item until substantial price increase then dropped item. if price drops to where it was I would resubscribe
Reviewed in the United States on September 29, 2024 by E. H. Anderson
Size: 5.25 Fl Oz (Pack of 1)
First and foremost, your engine needs a knock sensor to get any benefit from this. If it's not a performance car, it's probably tuned for 87 and may run worse if you add this. If you don't know whether it has a knock sensor, Google it. I added it to a tank of 91 octane gas, and my engine immediately responded with more torque. It was noticable. Not like adding a supercharger, but you can tell it's pushing a few more pound-feet of torque. I suppose this could boost mileage, but it just makes it so much fun to floor the accelerator... I will say that if I go on the freeway and reset the counter, and there's not much traffic, it'll read 35MPG with the air conditioning on all the way until I exit, even if that's 50 miles later. This is in a heavy Acura TL-S with a 3.5L V6. That might be two or three higher than usual. As for city driving, it's worse because, again, it just invites me to accelerate more quickly. Someone with a gentler touch might get better city mileage than me. Hard to say. I make mostly short trips on surface streets, so my mileage is going to be awful most of the time.
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Reviewed in the United States on September 16, 2023 by Horst Enthusiast
Size: 5.25 Fl Oz (Pack of 1)
Using in a 16 year old Lexus and has improved MPG and lost power. Only using every 3rd fill up with REG gasoline 87. Recommended for all V6 engines as also tried in a Ford, Dodge and other Lexus models.
Reviewed in the United States on January 12, 2025 by Jeff Moore
Size: 5.25 Fl Oz (Pack of 1)
i put this in my fuel cell to help with fuel storage
Reviewed in the United States on February 16, 2025 by tb23498
Size: 5.25 Fl Oz (Pack of 1)
This is a great octane booster and it was able to keep my car running great but once they got ridiculous and made it so you couldn't buy single bottles or even buy six bottles you have to buy 12 bottles or more so I switched to a different company that completely destroyed my vehicle this is a great octane booster what worth well worth the money it's just that it's upsetting that you can't get it in smaller package deals
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Reviewed in the United States on September 1, 2024 by Lance Gouvan
Size: 5.25 Fl Oz (Pack of 1)
Be careful of this one. Make sure you notice the ounces! You can buy the larger one at Meijer usually for a small difference and get a lot more. It looks like its a deal if you buy this until it's delivered and now you see the quantity is so much smaller than what you may be use to purchasing.
Reviewed in the United States on January 2, 2025 by Eric Bitzer