lawnmowers is this good to keep the system clean while using it and not just when storing it?

I've been using it in all the fuels for my mower, 2-stroke mixes, and my motorcycle and all three have been surprisingly clean, especially the two stroke motors.

Is this to be used prior to an oil change?

If it's like 500 miles before an oil change, that's OK. You can also use after an oil change, but TECHRON recommends NOT to use more than twice during a new oil change. I use during the last 500 miles (whole bottle) on near empty tank & run the car until the reserve light comes on. Been using this for at least 20 years. If the car runs rough, you can pour in a bottle twice, like every 2,500 miles, or repeat the process, whichever you want to do. For best results, try & do as much highway driving after pouring in & make sure to drive at least 5-10 miles to get it up in the lines & all before turning the engine off. Since you're going to be at the gas station & pouring in before refilling the tank, this is a good time. Good Luck!

What is the ratio of additive to fuel? Can it be used in nonethanol fuel?

1 oz per 10 gallons. It can be used in nonethanol fuel.

Can you reseal the 20 oz bottle and use the rest later?

You can't physically reseal the paper tab, but yes you can screw the cap back on & it will keep it sealed for later use. However, this will not guarantee the same 5 year shelf life.

Chevron Techron High Mileage Fuel System Cleaner 12 Oz Pack

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

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Description

⛽ Keep your high-mileage ride running like new — because every mile counts!

ETHANOL BLEND FRIENDLY - Compatible with all ethanol blends (E10, E85) and safe for catalytic converters and oxygen sensors.
FUEL EFFICIENCY ELEVATED - Boosts mileage by keeping your fuel system spotless and running leaner.
CORROSION NOT ON OUR WATCH - Advanced inhibitors shield iron, steel, copper & silver components from damaging corrosion.
REVIVE YOUR ENGINES MOJO - Eliminates gum, varnish & deposits to restore lost power and smooth performance.
TAILORED FOR THE ROAD WARRIORS - Specifically designed for vehicles with 75,000+ miles to combat age-related fuel system wear.

Chevron Techron High Mileage Fuel System Cleaner is a 12 oz powerhouse designed to clean and protect fuel systems in vehicles with over 75,000 miles. It removes deposits that sap engine power, improves fuel economy, and prevents corrosion on multiple metal components. Compatible with all gasoline and ethanol blends, it treats up to 21 gallons per bottle and is safe for modern and classic engines alike.

Specifications

ASIN	B086FJV5J8
Best Sellers Rank	#822 in Automotive ( See Top 100 in Automotive ) #7 in Automotive Fuel System Cleaners
Brand	Chevron
Customer Reviews	4.7 4.7 out of 5 stars (1,964)
Date First Available	31 May 2025
Item Weight	340 g
Item model number	266711163
Manufacturer	Chevron
Manufacturer Part Number	266711163
Model	Techron High Mileage Fuel System Cleaner
Product Dimensions	8.02 x 6.77 x 22.6 cm; 340 g

Reviews

J**Z

Que sea un artículo que cumpla con controles de calidad.

Hola Buenos días, en lo particular este producto es de buena calidad y si creo que cumple con las necesidades.

29.01.2026

م**ا

ممتاز

انا فخور جدا بالمنتج اصلي ١٠٠%

23.05.2026

D**I

Very fast delivery

Fast delivery and all good.

16.05.2026

C**R

Have used for years in autos, outboards and gas bikes

Have been using this product for years. Dissolves carbon and cleans fuel injectors. I know this because after about 100 miles of adding this to my tank a piece of carbon wedged itself between the gap in two of my spark plugs. Truck began to run very rough so i R&R'd all my plugs and found the carbon in 2 plugs. Also use it in a motorized bike and 2 outboard motors. I think its better than Seafoam for automobiles. Just my opinion.

12.08.2026

M**L

Excelente

funciona perfectamente, limpia y devuelve la potencia al motor.

16.09.2025

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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Received my product in pristine condition. Great service overall.

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Fantastic experience overall. Will recommend to friends and family.