How many gallons does it treat?

The front of the container states "Treats up to 21 gallons" -- my husband uses this product in our 1965 Mustang, which has a tank size of 16 gallons. Depending on how often he drives the car and fills the gas tank, he uses 1 bottle with each fill up. I hope this answers some of your question.

does this work on a 2 stroke?

Does your 2 stroke recommend a higher octane - 89+ and you can't get the fuel? if so, use it

Is this safe for use with catalytic converters?

I am using it in a 66 Mustang and a 73 Z28 neither have converters, so not sure

Will this stuff boost 93 octane to 95?

Yes, I think it is a gain of just under 2.5 octane numbers when added to 12 or 14 gallons.

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STP Octane Booster for Gasoline Fuel Additive, Restore Lost Power, 5.25 oz | Fuel cleaner for gasoline engines; 5.25 oz bottle treats up to 15 gallons, compatible with cap-less systems

STP Octane Booster for Gasoline Fuel Additive, Restore Lost Power, 5.25 oz | Fuel cleaner for gasoline engines; 5.25 oz bottle treats up to 15 gallons, compatible with cap-less systems

Product ID: 16201439

⛽Boosts octane for peak engine power

⚙️Cleans fuel system for smooth performance

🛢️Treats up to 15 gallons per bottle

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Description

⛽ Ignite your engine’s potential—because every drop counts!

MAXIMIZE MILEAGE - Improves MPG by optimizing fuel quality with every use
POWER UP YOUR RIDE - Restores lost engine power by enhancing fuel combustion efficiency
EFFORTLESS FUEL UPGRADE - No mixing needed—just pour before refueling for instant benefits
UNIVERSAL COMPATIBILITY - Works seamlessly with cap-less fuel systems for modern vehicles
TRUSTED PERFORMANCE BOOSTER - Top-ranked octane booster with 4.5-star rating from over 1,400 users

STP Octane Booster is a premium 5.25 oz fuel additive designed to restore engine power and improve fuel efficiency by boosting octane and cleaning the fuel intake system. Compatible with cap-less fuel tanks, one bottle treats up to 15 gallons, making it an easy, effective solution for maintaining peak gasoline engine performance.

Specifications

ASIN	B004MBFTYK
Best Sellers Rank	#9,266 in Automotive ( See Top 100 in Automotive ) #3 in Octane Boosters
Brand	STP
Customer Reviews	4.5 4.5 out of 5 stars (1,406)
Date First Available	February 4, 2011
Exterior	[[Not Applicable]]
Item Weight	5.5 ounces
Item model number	78574
Manufacturer	STP
Manufacturer Part Number	78574
Model	78574
Position	Outside
Product Dimensions	1.5 x 2.3 x 8 inches
Voltage	12 volts

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45.74 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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1 month ago

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