Red Line 40WT Race Oil

»»Red Line 40WT Race Oil

Red Line 40WT Race Oil


Available on backorder

Available on backorder

SKU: RED10404 Category: Tags: , , , , , ,


  • Versatile product used in stock car racing, road racing, and sprint cars
  • Used by many of the top Dirt Late Model teams
  • Used by top teams in NASCAR Spec engines for Camping World East and West Series
  • Reformulated for improved frictional properties
  • Special detergents for improved lubricity and less detonation
  • Polyol ester base stocks provide more stability and film strength when exposed to excess fuel dilution
  • Each of these products has no less than 2200ppm of zinc and phosphorus for antiwear
  • Each race oil product is a multi-grade, offering 2-4% more power than oil of a similar viscosity – 20WT is a 5W20, 30WT is a 10W30, 40WT is a 15W40, 50WT is a 15W50
  • Improved protection at startup, lower oil temp, cleanliness
  • Remember to change these oils more frequently than regular motor oils

Additional information

Weight 2.1 lbs
Dimensions 3.9 × 3.9 × 9.5 in

Why Red Line

In 1991, Rotax began production of a double overhead cam version of the 604 engine, including liquid cooling of the cylinder head. Ron Wood immediately began work on high performance parts and modified both the dirt track and road race frames to accept the engine. Bigger cams, shim-under valve lifter buckets and titanium valves were just a few of the parts that went into the new project. The twin cam engine also made more torque than its predecessor, meaning more stress on the clutch.

With the new parts and higher stress on the engines, more wear appeared on the cams, lifters and other parts. Up to that time, premium petroleum racing oils had been used in the Rotax engines. Ron consulted his good friend C.R. Axtell about the problem and “Ax” suggested that he try Red Line 40wt synthetic racing oil.

With the new oil, the cam and bucket wear was next to nothing. All the engine parts were in excellent condition after several races, whether in the dirt tracker or road racer.

In the past, synthetic oils had been avoided due to clutch slippage problems. Red Line had a history of working with some of the top motorcycle racers in northern California, and had experience with wet clutches. The extra torque had been a problem with the standard organic plate clutch, and there was obvious wear on the sintered bronze clutch at the standard driven plates. Switching to Red Line improved clutch life and reduced wear and slippage for both clutches.