I found bits and pieces of my question doing a search here. I hate to wait 7yrs./70,000 miles to do my own changes. What would REALLY happen if there was an engine warranty issue and you did all the oil changes yourself (kept receipts,records). Would you need an expensive lawyer to win? Is there anything, anywhere, that says it is o.k. for the owner to do the oil change under warranty? Anyone have any real life experience or advice?