These claims relate to all typical consumer driving conditions, excluding those mentioned below. In other words, if you drive under normal conditions and use Mobil 1 Extended Performance synthetic oil in your vehicle, the oil is guaranteed to protect your engine for 20,000 miles. We also recommend that drivers consult their owner’s manual while their vehicle is under warranty, and follow the guidelines set forth there. Additionally, we recommend that if consumers drive routinely in severe conditions that they follow the oil change interval recommended in their owner's manual for severe conditions. We define "severe conditions" as:
Racing or commercial applications
Frequent towing or hauling
Extremely dusty or dirty conditions