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Sale Is extended! Buy one kit or gallon get One 1/2 off!


New! HP 6 Pack On Sale. Save Big!

Includes 2 each HP Engine Treatment, 4 Fuel Conditioners and Free shipping! 

For Your Daily Driver or Your Race Car.

Kit includes everything needed to protect even better with the new HP Engine Treatment to preserve, and lubricate your engine from LSPI and other issues.

This New Patented technology will increase performance, durability and engine efficiency in your vehicle. New HP Engine treatment pre-cleans and protects internal components; resists friction and wear; provides optimum efficiency and performance; improves fuel economy and performance. 

Add 2 to the Cart & Get One 1/2 Off!


Truckers Get Longer Engine Life - 15 Years of Proven Results and 52 Worldwide Patents to Prove It!

BestLine will quiet motors, reduce friction that will increase horse power and reduce heat. BestLine provides the highest degree of wear reduction, lubrication. All BestLine oil additives contain our patented Extreme Pressure lubricity component and wear reduction agent. Performance is guaranteed! 

If you want the best in engine protection then you've come to the right place.  See our reviews from other truckers.  Get the best lubrication for demanding applications, use BestLine today.

Buy one get one 1/2 off


New HP Engine Treatment 8 Pack On Sale Now!

For All Car Types, daily drivers and race cars.

Massive improvements in top end lubrication without any ZDDP. Higher temp lubrication on main bearings that survive the high pressure and dilution of Nitro Funny car applications. 

The new HP Engine Treatment will make your car last up to 80% longer proven by our 52 worldwide patents and 3rd party test labs.  It always comes with a money back guarantee. 

New Improved 8 Pack - ON SALE Now!
Review: Caterpillar Diesel Engine Treated with BestLine Then Drained the Oil

Review: Caterpillar Diesel Engine Treated with BestLine Then Drained the Oil

See the Review Video Here - Youtube
Results You Can See - No Oil Alone Can Protect Like BestLine

Results You Can See - No Oil Alone Can Protect Like BestLine

Save on our Performance Kit today!

See It. Believe It.

Reviews and tests of BestLine on YouTube, many from customers or third-party reviewers.

Blowing Up A Motor: BestLine vs. 10W30
Customer Review of BestLine Using Lubricity Test
Sand & Liquid Glass Poured Directly Into BestLine Engine!
BestLine Saves Bearings Destroyed by Oil Under Pressure

BestLine pays for itself by reducing fuel consumption and wear on important mechanical components


Reduce noise, smoke and renew your engine performance

A radically new line of patented metal treatments that are also extreme pressure lubricants that dramatically reduce friction, heat and mechanical wear to an extent never before seen. BestLine lubricity is unaffected by fuel dilution in race motors so you can boost performance and extend engine and bearing life. BestLine

Engine Treatments make bearings and all other mechanical components last more than 80% longer. 


Your engine will last up to 80% longer. We stand behind it with 52 worldwide patents!

New technology in lubrication and metal treatments with 52 worldwide patents extends engine and equipment life and reduces lifter and other noise as documented in WEAR international tribology magazine.

Tested and proven by the leading Swiss Federal Institute of Technology in Lausanne (EPFL), a study is published by the world-renowned scientific journal “WEAR” from Elsevier.