why does my oil light come on only when my citreon dispatch van is ticking over and alright when moving is it the oil pump

julian, July 2007

A/ Check the actual oil pressure; switches can age and operate at un-neccessary high pressure; replace it with an oil pressure gauge either as a tempory or, my prefference, permanently. ( You can keep both by using a tee fitting. )
B/ Use a high flow / low back pressure oil filter.
C/ Check idle speed is not too low.

GMR, July 2007

Low oil level, Wrong oil, Oil pump, worn engine.

t, July 2007