Mazda RX8 Chapters

Can I Use Slick 50 in my RX-8?     Update: I contacted the firm that produces Slick 50 and this is what they say:
A Brief Answer:
"Yes, you can use the Slick 50. I would recommend the Recharged High Mileage Engine Treatment. Here are a list of stores that carry it":

Here are a list of stores that carry it":
Advance Auto Parts ,   Auto Zone ,    Car Quest ,     Walmart,      Blain’s ,     Fred Meyer,      Meijer,      Pep Boys,   Halfords...

Andrea Walraven, Slick 50, Customer Service Coordinator
Slick 50 Information

Breif History of Slick 50:
Since 1978, motorists have relied on Slick 50^® ’s superior technology to protect their vehicle’s vital parts from friction & wear, so they can achieve the performance they crave today and down the road. From Engine Treatments to Fuel System Cleaners to Transmission Treatments, Slick 50^® products are formulated with superior chemistry to ensure they clean, protect and optimize performance of critical systems.
For years, Slick 50 has increased engine performance and helped protect your investment. Now the inventors of the engine treatment are releasing customized formulas that will Supercharge your vehicle’s performance and Recharge performance in your high-mileage vehicle.
Slick 50^® Supercharged products are custom designed to get maximum horsepower and ultimate performance from your vehicle. Supercharged technology fights power robbing friction and heat to unleash your vehicle's performance.

NOTE: It's Originator for the Slick 50 Formula, John Bishop, the founder of Slick 50 between1978-1984. Unfortunately, Legal action was taken against the marketing company in 1984 by John Bishop due to a disagreement. During this process the Slick 50 name was not transferred and remained with the Marketing Company. The Original Formula remained with John Bishop and he later proceeded to manufacture under the new name of: XcelPlus - (xcelplus.com) - using the original formula that everyone was familiar with, however, many were unfamiliar with the change of name of the original product.

High Mileage
Slick 50^®, inventors of the engine treatment introduce Slick 50^® Recharged High Mileage Engine Treatment. Slick 50^®’s Recharged technology was developed for vehicles that suffer from lost performance due to friction and wear, oil consumption and leaks, smoking and sludge build up. It is formulated to restore the performance of your high mileage vehicle and keep it running like new.
Slick 50^®’s propriety formulation is built from a base of fully formulated 10W-30 motor oil that meets ILSAC GF5 motor oil specifications and enhanced with additives specifically for high mileage engines. Unlike some oil additives Slick 50^® will not dilute the additives already in your motor oil.