DO use a synthetic oil. 10W-40 and even 10W-30 regular oil does not permit your starter to spin the engine fast enough. That is our experience with a diesel car that was parked outside all day during an upper midwest winter.
DO use a synthetic oil. 10W-40 and even 10W-30 regular oil does not permit your starter to spin the engine fast enough. That is our experience with a diesel car that was parked outside all day during an upper midwest winter.