Polaris 2891028 - Extreme Heat (Up to 130 Degrees Fahrenheit) Extreme Cold (Down to -40 Degrees Fahrenheit) AGL Extreme Has 83.8 Degree Fahrenheit Cooler Sump Temp Under Extreme Load 50% Improved Fluidity In Extreme Cold 48% Better Film Strength AGL Extreme Synthetics is a new entry to the Polaris Extreme Synthetics line, designed to provide the absolute best protection and performance in transmissions / gearcases that see the most challenging conditions. No matter the challenge, new AGL Extreme will give Polaris ORV transmissions the best protection available.