It is if you don't follow the drain intervals. But, with the new EaO filters and the 0W-30 Series 2000 oil, you can now change oil and filter at one year intervals, or 25,000 miles. So, I pay $5.95 a quart for oil and about $12 for a filter, for a total of $47 and that's it until next year at this time. For "wasting" that money, all I get is a product that is so far superior to anything else on the market, it's not even funny. Do some research and know what you are talking about before you start making statements that don't make sense.
Mobil 1 is a quality oil, but in lab tests, it's not even in the same ballpark as Amsoil, not even close.