My 1999 oldsmobile silhoutte is spilling oil every where. What could be wrong?

One of the forum sites I went to said it's for low coolant and that there is no indication in the owners manual.

Both--but you have to find out what problems
the motor has & make those repairs first,don't
use it if it overheated, even once,park it & work on it

Rusty in color-that's neglect & no preventative maintenance,
unless you just bought it, in which case you lay it up for a couple
weeks & go thru it

i dont think so.. you need a wide drain pan under it and start taking the pan screws out..one at a time..start at a lower corner.. work around the high side and back around..slowly allow the fluid to run as you go..it should drain about 3-4 quarts..

dude u need 2 learn how to spell dependends on the year

Under the front of the engine, where it meets the transmission...and under the motor mount. If you disconnect the negative cable from the battery and jack it up, it's relatively easy to gain access. If it's still in original condition, remove the 10 millimeter bolt that's holding the plastic cover. Then remove the bolts that go straight up. Wiggle the starter out and down and then disconnect the two wires. I hope I've helped. If so please rate my assistance and leave a comment to help others in a similar situation find their answer. Thanks for using Fixya.

on the evaporator case

Change the thermostat,and bleed the air out of the system,and make sure the cooling fans are coming on,and then going off,on there own,with the ac off,if this was helpful,please rate,thank you.

most likely a blown head gasket or crack in cylinder wall if oil under that kind of pressure the more probable is crack in cylinder wall internal wont see from out side of block do pressure check on all cylinders and look at plugs for wet should be also getting steam from exhaust

10W30 should be fine

their is a radiator fan switch or coolent temp sensor that cuts it on possibly a relay but first unplug the sensor fans should turn on if not possible it has a bad fan motor