Benefits of keeping a vehicle maintenance log include ensuring regular maintenance, diagnosing issues faster, providing proof if the vehicle is a lemon, and using it to get more when selling or trading in the vehicle. Logs help owners keep track of services performed so they don't miss anything.
A record of past maintenance, service and repairs serves as a tool for a mechanic when a problem arises. The mechanic may gain insight into the problem if he knows what type of maintenance the car received. If the vehicle consistently has problems indicating it may be a lemon, the maintenance log shows that the owner took care of the vehicle. This can help the owner's case when taking legal action. The log also shows how well the vehicle is maintained when selling or trading it in, making it worth more to the seller.