Currently, I have 4 primary tables:
VehicleMstr
MaintMstr
FinanceMstr
PartsMstr
VehicleMstr contains all of the basic car info i.e. Model Year, Make, Model, Owner, Purchase Mileage, MPG.
MaintMstr is used to record all maintenance items i.e. Maint Type, Desc, Hours, Cost, Mileage Performed...