Bel-Ray Thumper Racing 4T Synthetic Ester Blend Engine Oil 

• Combines the finest quality synthetic esters and mineral base oils specifically engineered for today's 4-stroke single cylinder, multi valve racing engines
• Reduced cylinder and ring wear
• Longer bearing life
• Cleans deposits
• Controls sludge and varnish formation
• Keeps ring lands and grooves free of carbon build up
• The shear stability provides superior lubrication and film strength
• Minimizes friction for maximum power
• Prevents clutch grabbing for an easily controlled and efficient gear shifting and clutch operation