Lucas Oil 10003 Upper Cylinder Lubrication & Injector Cleaner (32oz)

Lucas Oil 10003 Upper Cylinder Lubrication & Injector Cleaner (32oz)

Q: 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!

Q: 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 .

Q: Whats difference between this and the fuel treatment 5 oz

Their is no difference other than the packaging

Q: 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.

4.7/5

Product ID: 257475535

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Details

Brand
Lucas Oil
Liquid volume
1 Quarts
Package information
Bottle
Vehicle service type
Car Truck ATV
UPC
049807100032

🚗injector & cylinder optimized

⚙️engine-safe formula

🛢️32oz premium capacity

Frequently Bought Together

Lucas Oil 10003 Fuel Treatment - 1 Quart

Lucas Oil 10130 Pure Synthetic Oil Stabilizer - 1 Quart

Lucas Oil 10512 Deep Clean Fuel System Cleaner - 16 Ounce

Description

🛠️ Keep your engine running like new — because your ride deserves the best!

EASY APPLICATION - Simple pour-in formula designed for hassle-free maintenance and long-lasting engine health.
COMPACT CONVENIENT - 32oz bottle with sleek, space-saving design fits perfectly in your garage or toolbox.
TRUSTED BRAND QUALITY - From Lucas Oil, a leader in automotive care trusted by professionals worldwide.
INJECTOR CLEANING POWER - Effectively cleans fuel injectors to restore peak performance and fuel economy.
MAXIMIZE ENGINE EFFICIENCY - Advanced upper cylinder lubrication reduces wear and tear for smoother rides.

Lucas Oil 10003 Upper Cylinder Lubrication & Injector Cleaner is a 32oz premium automotive fluid designed to clean fuel injectors and lubricate upper cylinders, enhancing engine performance and longevity. Manufactured by Lucas Oil Products Inc, this compact and efficient formula supports smoother operation and improved fuel efficiency.

Specifications

Manufacturer	Lucas Oil Products Inc
Brand	Lucas Oil
Product Dimensions	8.38 x 8.38 x 8.38 cm; 898 g
Item model number	LUC10003
Manufacturer Part Number	40003
OEM Part Number	10003
Item Weight	898 g

Have a Question? See What Others Asked

Will gas mileage increase

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

Whats difference between this and the fuel treatment 5 oz

Will it help remove P0420 code?

Reviews

4.7

All from verified purchases

T**D

متعادل

لاحظت عند استعماله فعلا انخفاض صرف البترول ولكن بعد ان ينتهى المحتوى من الخزان يرجع التحسن الى الاستهلاك مثل الاول مع فرق بسيط لا يذكر

1.09.2024

A**I

Genuine

Genuine product & the best

2.11.2023

M**3

ممتاز

14.12.2023

S**N

GOOD PRODUCT

Delivery so fast. Thanks

7.09.2023

S**.

Didn’t work, couldn’t feel any difference

22.04.2025

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

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

5 days ago

Zainab N.

Fantastic and great service. Shipping was faster than expected.

1 week ago

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