Bel-Ray Thumper’s special mineral oil-ester blend maximizes ring seal and reduces friction under high temperatures for enhanced engine power over conventional oils. High-performance polymer ingredients provide unbeatable shear stability which protects against viscosity breakdown.
Simply put, this is the best stuff you can put in your engine, period. Bel-Ray Thumper is offered in SAE Grades: 10W-40 and 20W-50 and in 1 and 4 liter bottles.
Price: $10.99 (1 liter) / $40.99 (4 liter)
More information: www.belray.com