Viscosity Index . Synthetic 75W-90 Gear Lube's high VI shows the lube's viscosity is temperature stable. It provides the fluidity and protection gears need in high and low temperatures. Indications are that the future trend will continue to demand more power and efficiency. Series 2000 Gear Lube allows working surfaces to glide past one another with minimal friction, keeping heat, wear and fuel consumption at their lowest.
Viscosity makes a real difference in fluid performance.
Less friction means better fuel economy, less heat build-up and less wear. In commercial vehicles, improvements in fuel economy are a top priority and Series 2000 has established its superiority. In passenger and race vehicles, superior friction reduction offers a major heat dissipation and protecton advantage. That's especially important for race vehicle differentials. They run so hot, they are often unsafe to service during a race.