10-26-2012, 01:06 PM
If you 400k miles engine is burning oil, you have more problems to worry about (O2 sensor, fuel economy), and should replace the engine or rebuild it.
If not burning oil, your oil viscosity /oil change interval is nonsense. Davester is dead on the money. That 2000 mile interval was sensible at one time for high mileage cars having no filter (1930's-40's). Today's oils are far superior to anything of that era.
If not burning oil, your oil viscosity /oil change interval is nonsense. Davester is dead on the money. That 2000 mile interval was sensible at one time for high mileage cars having no filter (1930's-40's). Today's oils are far superior to anything of that era.