Probably a blown head gasket.
10w30 is recomended.
Any 10W-30 oil meeting the API-SM specification is recommended for the 1995 Volvo 850.
Just shove it up you...
Oil mixing into the coolant of your Volvo 850 typically indicates a head gasket failure, which allows oil and coolant to mix due to a breach in the gasket. It could also be caused by a cracked engine block or a damaged cylinder head. This issue can lead to severe engine damage if not addressed promptly, so it’s essential to have your vehicle inspected and repaired by a qualified mechanic. Regular maintenance can help prevent such problems from arising.
I need to no how to remove oil pan
The oil pan from a Volvo 850 turbo is generally not the same as the one from a non-turbo Volvo 850. The turbo models often have specific design features to accommodate the turbocharger and may have different oil capacity or baffle designs. Therefore, it's important to use the correct oil pan specific to the model and engine type for optimal performance and compatibility.
To remove the oil pan from a 1994 Volvo 850, first, ensure the vehicle is safely lifted and supported. Drain the engine oil and remove the oil filter. Next, detach the exhaust pipe if necessary, then unbolt the oil pan from the engine block, taking care to remove any attached components like the oil pickup tube. Finally, gently pry the oil pan away from the engine, being cautious not to damage the gasket surface.
15w-40 covers temps -10f to above 104f. 10w-30 covers -20f to 104f.
10W30 if you get winter. If you dont get winter then 10W40.
The recommended oil grade is 10W/30.
Use only the weight recommended by Volvo and I doubt that they recommend 10w40.
Bad head gasket