If you think all engine oils are the same, you’ve figured wrong. Fact is, Mack Genuine Engine Oil provides measurable benefits such as longer drain intervals, increased wear protection and oxidation resistance, and far better high temperature viscosity. All these advantages add up to less downtime and significant cost savings for your fleet. Ready to see how much better you’ll do with Mack EOS-4.5? Just enter information about your current oil program below. Then hit ‘Calculate Savings’ to see how much time and money you’ll save by switching to Mack EOS-4.5 with proprietary additive technology.