An Evaluation of AMSOIL Signature Series Multi-Vehicle Synthetic ATF and Signature Series Synthetic Motor Oil Operated under Severe-Service Conditions for Extended Drain Intervals Few applications place more stress on lubricants than taxi cabs, particularly those operating in the desert heat of Las Vegas, NV. The combination of excessive idling, stop-and-go driving and high ambient temperatures creates the ideal scenario for lubricant failure, resulting in sludge formation and catastrophic component failure. Fleet vehicles, heavy-duty pickups, work trucks and other commercial applications operate under severe service. In addition, drain intervals are getting longer. For engines and transmissions to last as designed and […]