mpg
Our local news station recently did tests on all sorts of add ons, inserts, filters and fluids costing under $100 and found that one of the best ways to increase mpg is thru proper tire inflation and slow acceleration off the line. After testing 100 cars at random, only 11 had proper tire inflation! Of course over or under inflating your tires causes them to wear out quicker (tire replacement costs are another expense to consider)The EVIC is only a reference for pressure and mpg...using a quality pressure gauge will give u the truest readings.