I was driving last night and my 245 DL stalled going about 25mph down a slight grade. Right as it stalled, the oil light flashed on. I pulled over and checked the oil level. It was fine. Then I checked the coolant level. It was fine, too. I checked for any obvious hoses that were disconnected. Nothing abnormal. I took off the oil cap on top of the engine block and it was VERY hot, which makes me think the car stalled because it overheated. (My temp gage sensor has not been working for a few months, so I couldn't verify the temp.) I let the car sit for about 20 minutes and then tried to start it. First time, just a whizzing sound, second time the engine tried to crank, but wouldn't catch. I haven't tried it again, as my experience has generally shown that trying a third time to start a no-start brick doesn't magically cure the problem. But being the hopeful type, I will likely try it again tomorrow.

Any suggestion on how I can figure out what's wrong WITHOUT having it towed to a mechanic? Someone I know suggested the oil pump, but imediately said it was a guess. How do I check the oil pump if my car won't start?

Additional info: I noticed last night that the coolant was not nearly as hot as the oil cap. Is it possible that the coolant is not circulating and is causing the car to overheat? Also, in the last few months my car has been having occasional weak starts. It's a Calif car, so ambient temperature is around 60F this time of year. There are no obvious fluid leaks. I'd tell you the mileage, but the ODO stopped working years ago. I think it's about 150-200k.