I saw the oh sh*t gauge as well...what detector is that? How did you mount it so it would be effective?
So, recap on the oil....if the clutch plates are in proper condition we should be able to use automotive oil.
Lighter weight oil will flow better, but less pressure.
I have a 5th gen.I thought I saw a post about rerouting the hoses for coolant.It described getting rid of the "y's" and having the fluid go from the right rad. to the left rad. then back to the pump, instead of splitting the coolant between the two radiators at once.Any input would help.