Techron Fuel System Cleaner

Techron is Chevron's gasoline fuel system cleaner. It is sold at most auto parts stores.

Updated Oct 30, 2026. Edited by: Ilyass Ben Hakim.

Where to buy

Auto parts chains, big box stores and many gas stations stock Techron. Bigger bottles, such as 32 oz, usually cost less per ounce.

Professional insight

Mechanics match the Techron version to the fuel. Then they dose by tank size.

Complete Fuel System Cleaner is for gasoline only.
Diesel engines need the separate Techron Diesel product.
Add it just before a full fill-up.
Use one full tank per treatment, not a splash.

Check the label

Chevron Techron name on the bottle.
Exact version: Complete, Concentrate Plus, High Mileage or Diesel.
Bottle size, such as 12 oz or 32 oz.
Gallons treated per bottle, printed on the back.
Gasoline or diesel use stated clearly.
Sealed cap and intact safety ring.
Flammable and harmful if swallowed warnings.

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Techron at a glance

Maker: Chevron
Fuel type: Gasoline; Separate diesel formula exists
Service interval: Every 3,000 miles; Or at each oil change

The Complete formula suits carbureted, port injected and direct injected engines. It fits two-stroke and four-stroke engines. It handles E10, E15 and E85 blends.

How to use it

1Wait until the tank is near empty.
2Pour the bottle in with the engine off.
3Fill up with gasoline right away.
4Drive normally through the whole tank.
5Repeat at the next oil change interval.

Bottles for your tank

Calculator

Enter the gallons your bottle says it treats.

Tank size

gal

Gallons one bottle treats

gal

Bottles needed1.25

Safe use

Never put the gasoline formula in a diesel tank.
Not for aircraft engines.
Store capped in the original bottle.

Common questions

Is Techron safe for sensors and catalytic converters?: Chevron markets it as safe for these parts. Follow the bottle directions.
Is Concentrate Plus different from Complete?: Both are gasoline cleaners from Chevron. Read each label for its treat rate.
Can I use it in a lawn mower?: The Complete formula lists small two-stroke and four-stroke engines. Dose by the small tank size.