Yes, our oils permit drain intervals far beyond the capability of regular oils. Besides fuel and coolant contamination, drain intervals are primarily affected by oil shear (thinning out of grade) and oxidative thickening. TRIAX formulations use exceptional quality components to ensure that oil life is as long as possible. These oil change intervals are given based on a mechanically sound vehicle. Fuel and coolant leaking into the oil will dramatically shorten oil change intervals.