The recommended oil grade is 10W/30.
5.6 US Quarts (5.3liters)
10W30 if you get winter. If you dont get winter then 10W40.
I need to no how to remove oil pan
The following is for a Volvo 850 1995: M/T (M56L) Volvo Synthetic Gearbox Oil (97308) ...... 2.2 Qts. (2.1 L.) A/T (AW 50) (1) ..................................... 8.0 Qts. (7.6 L.) (1) - Use ATF Dexron IIE or Mercon fluid.
Probably a blown head gasket.
Use only the weight recommended by Volvo and I doubt that they recommend 10w40.
dino oil 10-30 or 5-30 is what i use synthetic causes a lot of leaks so i steer clear of it - but that is your choice
10w30 is recomended.
5.5 quarts of oil meaning 5 1/2 bottles of oil.
either 30 wt or 10w30 should be fine.
Volvo recommends 10w30 full synthetic oil.