Will gas mileage increase

I drive (and now use this in) a 1996 Toyota 4Runner. Prior to its use I'd averaged 17mpg, then performed a replacement on plugs, wires, and air filter (upgrading to a K&N); in addition to cleaning the MAF and throttle body (all on my own, mind you!). I now average anywhere between 19.5 (city) and just under 25 (highway). I'm not sure just how much of a fuel increase can be contributed to this product, but I no longer go without it!

Would keeping this in the car in hot Texas heat be an issue?

OF COARCE ITS A DANGEROUS ISSUE !! Storing any flamable liquid in a car is very dangerouse , especially a hot car !! you put yourself at risk of combustion from the heat & also combustion if you get in a accident !! buy a tiny bottle of lucas fuel additive , its about 5.5 oz.s !! fill that up and insulate it in trunk to keep it cool . then when you fill up ? you will have a bottle ready to put in your tank !! instead of hauling around a gallon of the stuff .

Whats difference between this and the fuel treatment 5 oz

Their is no difference other than the packaging

Will it help remove P0420 code?

2 bottles of Lucas oil, one gas refill apart, helped with my P0420 Code on Infiniti QX60 engine light. With the 2nd bottle, the light was gone. It worked like a charm. I will continue to keep the fuel tank clean moving forward. Tip : don't wait for the fuel tank to be completely empty before you refill.

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⛽ Tune up your ride, fuel your drive — the secret weapon pros trust!

FUEL ECONOMY MAXIMIZER - Enhances mileage by optimizing fuel combustion for both gasoline and diesel engines.
ENGINE LONGEVITY PROTECTOR - Neutralizes harmful contaminants and prevents rust, extending the life of pumps, injectors, and engine components.
COMPREHENSIVE SYSTEM CLEANER - Deep cleans injectors, carburetors, and combustion chambers to maintain peak engine performance.
POWER ACCELERATION BOOSTER - Improves fuel flow and reduces deposits, delivering noticeable power gains and smoother acceleration.
UNIVERSAL ECO FRIENDLY FORMULA - Meets federal low sulfur standards and safely replaces lead in older engines without harmful effects.

Lucas Oil 10003 Fuel Treatment is the world’s #1 additive designed for gasoline and diesel engines. This 1-quart formula cleans and lubricates the entire fuel system, boosts fuel economy, increases power, and protects engine components from rust and corrosion. Compatible with a wide range of vehicles, it meets federal low sulfur requirements and safely replaces lead in older engines, making it an essential upgrade for any performance-conscious driver.

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AR$60598

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TrustScore 4.5 | 7,300+ reviews

Ali H.

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

1 day ago

Imran F.

Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

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Brand	Lucas Oil
Vehicle Service Type	Car, Truck, Motorcycle, ATV, Boat, Lawn Mower, etc.
UPC	049807400033 049807100032
Automotive Fit Type	Universal Fit
Global Trade Identification Number	00049807100032
Manufacturer	LUCAS OIL
Size	1 Quart
Model	051-587
Item Weight	1.98 pounds
Product Dimensions	3.3 x 3.3 x 3.3 inches
Item model number	LUC10003
Is Discontinued By Manufacturer	No
Exterior	Painted
Manufacturer Part Number	40003
OEM Part Number	10003

Lucas Oil 10003 Fuel Treatment - 1 Quart

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