my mom drives an accord, bought new, and has since put about 30,000 miles on it. the oil has been changed by the dealer every single time(when the olm goes down to 15%). she works at the local junior high no more than a mile away, goes there, and comes home in the afternoon. so it sees an average of 10 miles a week of extremely short trips on the weekdays. and she'll go to wal mart a few times a month which is 7 miles from the house. the longest trips it sees (rarely) is when she goes to new orleans, about a 180 mile round trip drive, and houma, which is a 45 mile drive. being she does mostly short trip driving, should her oil be changed more often and not according to the olm?