Originally Posted by Mike Rainbird

On the Defi's you can set the alarm warning function as high as you want. You are confusing the standard oil light with a proper gauge, as by the time this comes on, your engine is most likely fucked. However, I have my warning set at 2 bar, so this should give me plenty of warning if it goes below this in normal driving. Obviously it is on at idle, but I know that isn't a problem.