Exactly how much oil does the oil pan on a1989 240 hold. I've read somewhere that it was around 3.84 litres (does that include the filter). I'm only asking because I recently changes the oil with Mobil 1 which comes in 4.4 litres jugs here in Canada. The car now leaks oil underneath and I was wondering if I overfilled it. My car has 212000kms and i've been running synthetic for 160000kms. I usually check the pvc system once a year and have found synthetic keeps it very clean. Does too much oil cause too much positive crankcase pressure. Thanks.