Choose your own Interval
Thank you!
We appreciate your business.



Thank you for your recent purchases. We love to work with our customers and your business is appreciated. With AMSOIL, you've made a great investment.  

We at the Synthetic Warehouse are committed to provide you with the best pricing and service of any AMSOIL dealer online or by phone. This number is for you to call us for answers to any of your technical or ordering questions. If we are on the phone or away by leaving voice mail an email is sent so we can get back to you as soon as possible. 

Special ongoing offer (for the last 10 years):
Please take note that when you call us by phone directly here at The Synthetic Warehouse you save 15% to 25% over the retail online prices. In some cases you can save the sales tax. We ship from the 10 AMSOIL warehouses as well as our Sioux Falls and Omaha stores to save you more without the traditional $20 AMSOIL membership fee!! Hint - Eventhough we charge for shipping, your total will still be significantly less than online ordering because you pay for the actual shipping rate, not some average rate added back to the product price.


Call us for a price check at 800-579-0580. Also for ordering and the best technical support. I can email you a wholesale price list if you request one. Just reference this thank you note and ask for Ches.


Open for a note on producing quality products at AMSOIL


 Quality Products - Focused Effort



Thanks again for your patronage and using the best of the best, AMSOIL!!!   


Please contact us at:

Toll free: 1-800-579-0580

or the phone at our store is 605-274-2580.


40th Anniversary  

Ches Cain
The Synthetic Warehouse
Amsoil Regency Platinum Direct Jobber