NHTSA Complaint #11679980 — 2013 HONDA ODYSSEY

This vehicle began using oil and the mechanic I took it to told me that the piston rings were compromised. This was allowing mixing of oil and gas, overuse of oil, intermittent white plumes of exhaust and causing misfires, fouling of plugs and set off codes pertaining to the piston rings as well as the catalytic converter. He changed the spark plug and told me my options were a rebuilt engine or to replace it. It would continue and it would get worse. Honda issued a warranty extension realted to misfire dondition related to piston ring deterioration (DTCs P0301 - P0304.) The dealer I took it too states that since the above mentioned codes are not present, they cannot perform the warranty work. The dealer did ask and corroborate that changing the spark plugs will "buy time" and is a cheap fix that does not correct the issue but may extend the life of the engine. The mechanic agrees that the issue being warranted is the issue i was experiencing but does not have a copy of the codes to prove it. I am frustrated that this warranty clearly applies to my vehicle, but because I hired a mechanic previously who has prevented the codes from being present, I am out an engine. Please help