A 3,000-mile oil change interval is really just a rule of thumb.
These new Engine Oil Diagnostic Wipes from Driven Racing Oil are designed to help you know exactly when an oil change is needed. The wipes work by determining the basicity (or total base number, aka TBN) of the oil. Using the wipe is simple: Just wipe the dipstick with it and then check the wipe’s color. If it turns pink, the oil is still good. Just a little pink means the oil should be changed soon, and no pink means the oil is acidic and an immediate change is necessary. Three wipes come in each $5 package. Information: Driven Racing Oil, drivenracingoil.com.