Dead Serious

How much oil are you talkin'. It took a lot of oil to finally kill the coil. If the coil is so bad it wont fire at all its a simple test of unplugging one by one until you find the one that doesn't fire. That is assuming you don't have the means to read codes that will tell you which cylinder. If the coil is just weak it wont throw a code and still works for the most part, you could wait for it to die but in the OP's case it ran like shit for a long while. This is a weak suggestion but just find a local to borrow a coil and swap em out one by one and find the one with an intermittent problem. You cant exactly diagnose a coil with a DVOM because they have a built in ICM that, generically speaking, acts like a switch. If its totally wasted you will get infinite ohms across both of the circuits maybe but in the case of an intermittent issue like mine only a fancy machine simulating engine operation and measuring discharge voltage would identify the bad coil. Coils are cheap and S2K helpers are all over so either find someone to loan you a coil or buy one cause they aren't expensive.

HarryD

As an update:

I've driven a few weeks with the new coil pack and the car runs smooth. I swapped in the old one for kicks and it immediately starts puffing out of the exhaust and shaking, still no CEL. So problem solved!

Last bit of advice:

2004-2005 coil packs also work for 2000-2003 cars. The 2004-2005 coil pack is also 50% cheaper than the 2000-2003 coil packs at around $40-50/each.

Thanks for everyone that helped!