90 Day Money Back Guarantee

90-Day, Money-Back Guarantee

We are so sure you'll be happy with your purchase, we're backing it with a 90-Day, Money-Back Guarantee.
All we ask is that you try the product(s) for a full 60 days before deciding if you want a refund.
Why? It's simple, really. GO15™  is designed to slowly adapt to your specific engine.  This means that it can take up to a few weeks before you experience the wonderful benefits it will provide.

Remember, your engine slowly began to wear over the months and years. Give GO15™  the time to slowly improve the efficiency and strength of your engine.

So, please allow GO15™ a full 60 days of use before deciding what you think of it.  We think you will be very happy with the results. The best results have been an initial use of 1,000 miles, then a complete oil change with another bottle of GO15™ with the new oil and thereafter a new bottle of GO15™ with each oil change for maximum protection and performance!

We know you will love GO15™! If, after trying GO15™  for 60 days, you're not happily satisfied, send them back for a full refund (minus shipping).

The GO15™ Promise:

  • We accept returns on all items within 90 days of date of delivery.
  • We will refund the entire purchase price of the order (less shipping).
  • There are no hidden fees or re-stocking fees.

Should you wish to return an item, please contact our office to obtain a Return Authorization Number, along with return instructions. This will ensure there are no delays in issuing your refund.

To begin the refund process, please call: 727-433-5862

Refunds are usually finalized within 60 days of submittal.

Please note:

  • We can only issue refunds that are accompanied by a Return Authorization Number.
  • We can only issue refunds for product that is returned to our warehouse: be sure to send back all empty, opened, and/or sealed items from your order.
  • A single product can only be returned once. Re-ordering a product, after stating that it was unsatisfactory, and then attempting to return the product a second time, will not be honored. This policy enables us to continue to offer our affordable product, a generous guarantee and prevent fraudulent returns.
  • Once a Return Authorization Number has been issued, your return package must be postmarked within 5 days, to ensure that the items are returned promptly.

To obtain a Return Authorization Number, please contact us within 90 days of the date that you received your order (delivery date). Please email or call us with any questions, comments or concerns you may have, at any time - we welcome and appreciate your feedback! We want to ensure that you feel confident about your purchases, and that you enjoy the benefits and advantages provided by GO15™.

You can obtain a Return Authorization Number by calling a customer service agent at 727-433-5862 or by email: DougDHC@hotmail.com

After obtaining your Return Authorization Number, send Returns (freight prepaid) to:

Engineous USA, Inc.

Visit Corporate Website
1711 W. Oliver Dr.,
Citrus Springs, Florida, 34434
Toll Free: 727-433-5862
Email: DougDHC@hotmail.com