overheating

So this problem started several days ago and I haven't managed to find out what is causing the overheating. I was driving down the road when my water temp shot up to 290. I pulled over and popped the hood. The coolant reservoir was overflowing and boiling. I let the car set and cool and started...

Ok, So my new delima is the car seems to be overheating, my coolant temp was steady at 199*, my oil pressure was at 55-60psi at 65mph, but my oil temp was climbing starting out at 210 and climbing all the way to 260-270. I have full oil, and I'm running royal purple for all my fluids. I don't...