I’ve talked with thousands of owner-operators and many fleets about when they change their engine oil and why. The most common answers are 15,000 miles – and a blank stare. Often someone will add, ...

Last month I discussed how oil doesn’t wear out but needs changing only because it becomes too contaminated to do its job. Changing oil at an arbitrary mileage points to only two scenarios, both bad: ...

Whether you're running the Dusy Trail, the Rubicon, Moab's Hell's Revenge, or maybe just cruising a Colorado backroad over Pearl Pass, there is one thing that keeps you from walking: Oil. We all know ...