56 plate vectra 1.8 vvt 40000 miles
After been stood over night or for a few hours the oil pressure warning light takes 3 to 4 seconds to go out, if i stop engine and then restart it goes out as the engine turns!
I changed oil filter to see if that was problem, but that didnt help, is there an anti drain back as the filter housing was not full when I took old oil filter out. Bought it 2 months ago from Citreon dealer, they say its a quirk of vvt engines and all is ok.
I'm not so sure, any thoughts?