2009 C70 110,000 miles.
didn't get that oil filter cap o ring on correctly. Oil started squirting out at about 500 miles, onto the alternator. Warning lights came on. I stopped the car. Got it home and fixed the o ring issue. Refilled with oil. Started the car, all was well. Then ABS light came on, Anti-Skid light, Check Engine light and Brake light. Then all lights go off, Fuel and Temp gauge defaults to the left side. And will only idle. HELP...

 

I'm assuming that this is a US model with the 2.5T engine.

It does sound like you have an intermittent electrical power issue. The bank of warning lights is what is seen when the battery gets below a certain voltage. So, a quick check would be to test the voltage when this happens to figure out if it is a low power issue or other.

I suggest you start there.

 

Come to find out, it was the alternator.