Purchased a 2001 MDX recently (1 month ago) with 35 k miles. It was a previously leased car and is in exceptional shape. However, it only gets 12.5 mpg even though I put in Shell V high test. I had Acura check it out and they said that they could not find a fuel sensor or computer problem. What I am thinking is that the guy who leased it for 4 years might have run only regular in it, thus messing up the computation of the fuel. If this keeps up I might have to trade it in on a vehicle that will get better gas milage. Anyone with ideas what the heck is going on please let me know - Thanks