Hi all just woundering if I'm checking my oil the correct way I select check oil on the BC on stalk I have noticed sometimes when I start it that it dosent work but it does after I leave it bit longer not sure if it has to be in neutral or on run anyway once the gauge drops one orange block does that mean it needs 1 litre of oil thanks also what's BMW recommend oil grade as the car had a service in august and I'm the new owner now so not sure what the grade is because on service receipt it just says 7 litres of oil