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

Product ID: 16201439

⛽Boosts octane for peak engine power

🧼Cleans fuel intake system effectively

🛢️Treats up to 15 gallons per bottle

€ 12.81

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Description

⛽ Ignite your engine’s potential—don’t let power slip away!

EFFORTLESS USE - No mixing—just pour before refueling and go
POWER UP YOUR RIDE - Restores lost engine performance with every fill-up
CAP LESS COMPATIBLE - Works seamlessly with modern fuel systems
DUAL ACTION FORMULA - Boosts octane and cleans fuel system simultaneously
FUEL EFFICIENCY FRIEND - Optimizes combustion for smoother, more efficient drives

STP Octane Booster is a premium 5.25 oz fuel additive designed to restore lost engine power by boosting octane and cleaning the fuel intake system. Each bottle treats up to 15 gallons of gasoline, is easy to use with no mixing required, and is compatible with cap-less fuel systems, making it a must-have for maintaining peak vehicle performance.

Specifications

ASIN	B004MBFTYK
Best Sellers Rank	#9,269 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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€ 12.81

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered 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 Greece.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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