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 up to +15 points

🚗Treats up to 15 gallons per bottle

⚙️Cleans fuel system for smoother engine

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Description

⛽ Elevate your drive—because your engine deserves the premium treatment!

FUEL SYSTEM DETOX - High-performance detergents clean and protect your fuel injectors and intake valves.
ADVANCED OCTANE BOOST - Reduce engine knock and ping for a smoother, quieter ride.
UNIVERSAL COMPATIBILITY - Works seamlessly with all gasoline engines, including cap-less systems.
POWER RESTORE IN EVERY DROP - Revive lost acceleration and engine responsiveness with every fill-up.
EFFORTLESS USE MAXIMUM IMPACT - Just pour before refueling—no mixing needed, perfect for busy pros on the go.

STP Octane Booster is a 5.25 oz fuel additive designed to enhance gasoline engine performance by boosting octane levels, cleaning the fuel system, and reducing engine knock. Compatible with all gasoline engines including cap-less systems, one bottle treats up to 15 gallons, improving acceleration, fuel efficiency, and overall engine smoothness.

Specifications

ASIN	B004MBFTYK
Best Sellers Rank	#8,367 in Automotive ( See Top 100 in Automotive ) #3 in Octane Boosters
Brand	STP
Customer Reviews	4.5 4.5 out of 5 stars (1,395)
Date First Available	February 4, 2011
Exterior	[[Not Applicable]]
Is Discontinued By Manufacturer	No
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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In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

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