I also have a 2009 Odyssey EX-L that burnt 2 1/2 quarts of oil on a road-trip (10,000 to 12,000 mileage), and now still burnt 7 ozs/1,600 miles per the dealer's last oil consumption test (after he adjusted the software to minimize the cooling of the VCM-shut-off cylinder-rings). If zaken (above) is correct that it is my fault by not doing what he recommended as far as the way my wife and I should have driven and type of oil we should have put in it the first 500 and 10,000 miles, then why did not Honda direct us to do this (in the maintenance manual for example)? How are we to know otherwise? Honda dealer was the first to change my oil at 5,500 miles (when the maintenance minder notified that it needed to be, there is no other maintenance schedule). I changed it every time the Maintenance Minder told me to (using NAPA Synthetic Oil). At 17,000 miles Honda Dealer told me that I must not have replaced enough oil when I changed it since they could not find any oil leaks as a cause. Subsequent oil changes were at Honda Dealer, no mention of oil consumption. Did they not look for it, or did they just overlook it? At 34,000 miles I had the oil changed at a favorite after-market mechanic. He told me that the oil was several quarts down and that this could in no way be normal. I am in the middle of the dealer's oil consumption test, but it seems that their only response will be to "adjust the software" to try to minimize this design failure of the VCM (variable cylinder management) system. Honda's non VCM engines do not burn oil (nor do Toyotas, Subarus, or any others) and only a few (lemons?) of their VCM engines do. To me this is a design flaw. One Google-find said Honda recognized this by changing the composition (molybdenum) of the piston rings and adding piston skirts to all 2011 VCM engines Does anyone know about this? If it is a design flaw and are cars are still under the 5yr/60,000-mile Warrantee, shouldn't Honda cover this under Warrantee? I think so and am willing to join anyone's class-action suit (if the dealer and BBB doesn't satisfy).