The DeLorean used gauges made by General Motors AC Delco division. I have no idea who made the gauges Volvo used for the B28F series cars but there is a real possibility the calibration is different in the Volvo sender because of the difference in those gauges. I'm guessing that DeLorean used a sender that Volvo or Renault used and that's why Delorean oil pressure gauges always jump to the top of the scale. The sender Marty Maier recommends in the Mid States Club web sight is the proper match to the AC oil pressure gauge. Bruce Benson