Horses for courses I guess. Spending $100+ on good engine oil may seem to be an expensive exercise, but then, so is replacing grills, under-car lighting, air intake mods, exhaust mods blah blah blah, all of which at the end of the day, don't really do all that much other than visual / sound appeal, fine if your into that sort of thing, but like I said, Horses for Courses :D Yes Mobil 1 is $$$$$, as are all good quality synthetics, but you sure can hear the difference on start-up, idles smoother (didn't think that was even possible in an engine that is so smooth to begin with) and over time, internals stay a whole lot cleaner, nowhere near as much sludge build up.