For orders of $49.00 or more
Orders over $49.00 may select free 2-Day Express shipping at checkout. This is a residential delivery service, with deliveries Monday through Friday from 9:00am to 8:00pm.
This item is considered hazardous material. Orders containing this product will ship ground only and cannot be shipped to Alaska, Hawaii, or US Territories.
Silkolene's Pro 4 SX Synthetic 4-Stroke Engine Oil is a fully synthetic, ester-based racing 4-stroke engine oil for all high performance off-road motorcycles. It utilizes Electrosyntec Technology and base materials derived from aircraft turbojet engine lubrication for outstanding wear protection, excellent load-carrying and high film strength properties. It is suitable for all high performance power units running on lead-free, low-lead or racing gasoline and has excellent detergent properties to ensure exceptional engine cleanliness. Its stable multi-grade characteristics give optimum protection and superior gear change characteristics.
Ester-based, full-synthetic 4-stroke off-road racing engine oil.
Advanced surface chemistry provides vital protection to pistons, cams and bearings even during cold start, prior to lubricant flowing.
Excellent thermal and shear stability give stay-in-grade performance.
High film strength reduces friction and transmission wear.
Improves clutch "feel" and reduces wear even with aluminum plates.
With Silkolene's proprietary Electrosyntec® Power.
Meets or exceeds API-SF and SG standards.
Motorcycle 4T JASO-MA2 certified.
Electrosyntec® Power Technology: Introducing Electrosyntec Technology; powerful intermolecular forces bond low friction molecules to stressed metal surfaces by a process of electrostatic adhesion, significantly reducing friction and wear from start up to full power. This offers improved protection against engine wear, provides long-term performance retention, and, most interestingly, minimizes friction at crucial points in the engine to release hidden power. Electrosyntec technology was pioneered due to demands from Silkolene's racing partners for improved power and performance, and it utilizes Silkolene's own synthetic base material designed to their exact requirements. Put simply, Electrosyntec Technology extends the boundaries to provide the next generation of oil for the latest generation of bikes. Don't miss out on this fantastic opportunity, demand Silkolene Electrosyntec Oil Technology!
Switched to this oil from Bel-Ray Thumper and am really happy with it. The motor has quieted down a little. Also heat robs alot of power from my bike and I feel the bike is cooling faster and loosing less power on extended rides
5 out of 5 stars
Over 6 years ago
Silkolene Pro 4 is the Best
Recently switched to Silkolene from Motorex and I have to tell you that after a full weekend of racing stuff still looks and smells new - as the Motorex was black and smelled burnt Highly recommended A+
5 out of 5 stars
Over 7 years agoLocation: dallas, tx
I have always used Silkolene products and have never had any problems. I started with pro 2, and my pistons always looked brand new. Everything I heard or read indicated this it top quality stuff. I also love Silkolene Pro Prep, just spray your whole bike with it and it looks better than new (dirt bikes only). It also cleans easier after the next ride.