So is this just an octane booster? There are some buzz words in the description, but chemically what does this do to "increase engine performance"?

High octane increases HP substantially on direct injected turbo boosted engines. Octane rating is a rating for how much the fuel can withstand compression without detonating (knock)-(leads to misfires). There are several benefits to using this product and even a higher octane fuel.

will it clean a fouling plug ?

Modern engines usually maintain a fuel to air ratio on their own - through the computer. A fouling plug can mean several things, some requiring engine maintenance or it just could be you are using regular when you should be using supreme. Before using any additive you need to insure the engine fuel system is working properly, so replace necessary parts like the plugs, injectors and the fuel filter. It helps to have a vehicle fault code reader. Liqui Moly makes a Fuel System Cleaner, that will reduce residue buildup in the cylinders and other gunk that gets into the fuel through poor storage practices. If there are no serious identifiable fuel system problems, run two cans of the Fuel System Cleaner through the vehicle, one each in a full fuel tank. This will improve minor engine roughness. The Liqui Moly Speed Tec is a fuel power/octane enhancer, not a fuel system cleaner, but will increase the miles per gallon performance of your engine and help reduce residue buildup.

Can I add to a full or partially full tank or should I add to empty tank before fill-up? Thanks

Liqui moly says to add to a tank before fueling but it's not crucial, just add it and go, that's how I've always done it and it works fantastic

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⛽ Ignite your engine’s true potential with Liqui Moly Speed Tec!

BOOST YOUR DRIVE - Enhances engine performance for smoother, more responsive rides.
INSTANT START POWER - Improves engine start-up reliability, no more cold start frustration.
EASY FUEL TANK ADD IN - Simply add directly to your fuel tank—no hassle, just pure performance.
ENGINEERED FOR SAFETY - Tested safe with catalytic converters and turbochargers—protect your investment.
UNIVERSAL COMPATIBILITY - Perfect for all 2- and 4-cycle gasoline engines—one solution for all your rides.

Liqui Moly 20234 Speed Tec Gasoline additive (0.25L) is a premium German-engineered formula designed to optimize engine performance, improve start-up smoothness, and ensure compatibility with all 2- and 4-cycle gasoline engines. Tested safe for catalytic converters and turbochargers, it’s the effortless fuel tank additive that delivers enhanced driving pleasure and engine protection.

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TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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

1 day ago

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Capacity	2.5E+2 Milliliters
Fuel Type	Petrol
Manufacturer	Liqui Moly, Manufactured by - Liqui Moly, Germany ; Imported by Anand Group ; Authorized Distributor - GO RETAILS INDIA
Global Trade Identification Number	04100420202346
Model	Liqui Moly 27
Product Dimensions	16.51 x 5.33 x 5.33 cm; 272 g
Item model number	20234
Manufacturer Part Number	20234
Volume	8.45 Fluid Ounces
Assembly Required	No
Manufacturer	Liqui Moly
Item Weight	272 g

Liqui Moly 20234 Speed Tec Gasoline, 0.25 l, 1 Pack

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