So we've got this hilux pickup 1993 model; starts very quickly after sitting for a while so good engine, but the oil light comes on. It comes on after about 20secs of running, turn the engine off and wait a minute, turn it back on and the light is off again. wait 20secs and it's back on. I'm guessing with the engine off the oil's draining into the sump, and once it's on the oil's pumped out of the sump into the engine so it registers as low. however, on the dip stick it's within the markers, probably about 2/3s the way up to full. Any ideas???? Many many thanks in advance...can't get it MOTed til this is fixed. On a side note anyone want an old hilux pickup?