Use only DOT3 brake fluid.
the 1994 oldsmobile lss has both the computer controlls the govenor
240HP if SC
27
I used a lawn mower gas line replacement kit. The plastic gas line split going inot the Supercharger and was leaking severly.
Remove the damaged line from the vehicle and take a measurement of the length. Go to your local auto parts store and they will set you up with the line and parts you need. Bend the new lines up to match the original as best you can. Install the new lines and bleed the system, done.
Under the steering wheel
On top and inside the fuel tank.
Computer controlled.
Mine has 195,000 miles and still counting......
About 22 liters in my 1996 Oldsmobile LSS
Either your coolant is actually low or you have a coolant sensor bad.