The Dynamic Duo: AMSOIL P.i. & Upper Cylinder Lube

Upper cylinder lubricant

What’s the difference between AMSOIL P.i. Performance Improver and AMSOIL Upper Cylinder Lubricant? One’s a deep-clean product, the other a keep-clean product.



How to Boost Fuel Mileage

fuel mileage

Follow these seven tips on your next trip to help boost your fuel mileage and save a little extra at the pump. But be sure to avoid this dangerous practice.



2019 AMSOIL Engine Masters Challenge Wrap-up

Patrick Blair returned to Engine Masters Challenge after 11 years away and took the win. But if there was a “perseverance” award, it would have gone to Daniel Boshears.



Do Fuel Additives Work?

AMSOIL P.i. fuel additive

Motorists expect fuel additives to immediately boost performance or fuel economy. But most require use for several tanks of fuel to work. Not AMSOIL P.i.



Gordon Tronson: The Epitome of Awesome

He’s built his own Lamborghini, a Harley that runs on four engines, a 4,000-hp Econoline and a reputation as eccentric genius. Meet Gordon Tronson.



What is a Limited-Slip Differential (and What Type of Gear Lube Should I Use)?

Your differential allows you to corner safely while putting maximum traction to the ground. Here’s how it works, and what kind of gear lube to use.



Is Starting Fluid Bad for Gas Engines?

In small doses and used properly, starting fluid can be effective in hard-starting gasoline engines. But it can be bad for two-stroke or diesel engines.



How to Perform Oil Analysis

Oil analysis provides a glimpse inside your engine to gauge lubricant and component condition without so much as removing a bolt or bloodying a knuckle. Here’s how to do it.



What Is A Rat Rod, Revisited

What is a rat rod? Simply put, it’s a blue-collar hot rod. But, as Rat Rod Magazine Editor-in-Chief Steve Thaemert says, it’s much more than that.



Why Does My Engine Knock? 3 Possible Explanations.

Do you hear an engine knocking sound when you hit the gas? It could be due to pre-ignition or detonation. Here’s what you can do about it.