Back in 1972, AMSOIL became the first 100% synthetic motor oil to become API-qualified.  Since then many oils have come to meet AMSOIL's challenge, but none can compare to our quality!  Just take a look at our synthetic oil comparisons.  And as you can see in the picture of the AMSOIL can from 1972 (back then named AMZOIL), we've always had our 25,000 mile or 1 year guarantee.  Check out our Signature Series line of synthetic oils for the best quality oils money can buy.  The best performance, the best fuel economy, the best oil.  Thanks for 40 years and millions of gallons of AMSOIL produced!

On March 1st, 2012, AMSOIL Inc announced that it is releasing a new product called AMSOIL Motorcycle Octane Boost.  It is designed to increase the octane rating of your gas by 3 numbers, helping primarily with startup engine performance and eliminating engine ping or knock.  So at low RPMs you will have increased power, allowing you to get up and go even quicker!  And since AMSOIL only wants to produce the best for your engine, it contains detergents that will help keep your combustion chambers and fuel delivery systems free of contaminants.  This obviously helps keep your bike running with the maximum power it was designed to have. For those concerned about their catalytic converters and oxygen sensors, AMSOIL Motorcycle Octane Boost won't harm those components when using the product at the recommended treatment rate.  For the time being, AMSOIL Motorcycle Octane Boost is only shipping in the USA.  Enjoy!