Got a phone call from a new MGB owner with an oil pressure problem. He says at start up the gauge reads 40# and once warm drops to 0#, but no engine rattles with 0 on the gauge. My responce was to try a differant gauge or sending unit, if it was really 0# the engine would rattle like crazy. It's a 78 and I think that year has an electric gauge? Anyone else had this problem or have any other ideas?