We have in this morning a 1987 Ferrari Testarossa for an oil change. We already have the genuine oil filter. What I need to know is the factory recommended oil for this car (in particular the viscosity). Also, is there a special procedure for changing the oil? Quantity of oil would be good to know too. I know it's dry sump so it'll be a lot, but I need to order oil NOW. If I get no information I'll go with Mobil 1 0W-40 or Mobil 1 15W-50 EP which should be safe. We are limited on what oil we can get here. Maybe Redline but no Motul etc. Please help, thanks - Ian.