Thanks for the fast reply. So you think the oil lines are engine oil cooling lines and not transmission then? This does make sense since the oil in the transmission has not dropped and I don't think the transmission oil is under enough pressure to overcome cooling pressure when the engine is hot. Th...

I have a 1999 S80 2.9 non-turbo with 165,000 miles. I have read some of the problems people are having with oil present in the coolant but non seemed to mention a loss of oil in the sump. I noticed ~1 inch of a brown substance floating on the top of my coolant overflow reservoir tank. It smelled lik...