Every day your engine is under attack. Sludge deposits, wear, oxidation and heat work together to chip away at your engine’s performance, creating dirty surfaces full of contaminants, unwanted friction and uneven oil viscosity.
Depending on where and how you drive, you could be making matters worse. Subjecting your engine to severe cold or heat for hundreds of miles can thicken or thin your oil, cutting your expected oil change interval. Routes with frequent steep inclines or rough surfaces, or even just pushing your rig too hard, can affect efficiency too.