I was driving my (1997 GT) 4.6, down the road very soon after doing an oil change, I’m sure everything was tightened down correctly oil filter was replaced too, and no oil has leaked, it was also 5w20 Mobil 1 oil. After doing a pull to about 5k rpm, my engine starts knocking and stalls out, I start it again read the codes and there are 4 different misfires, cylinder 1,4,6 and I think 5, and some smog thing too, then I clear them and restart it, it struggles for a bit and then the knock goes away completely, and I drive home. The next time I start it it’s running beautifully again, and after a while it seems a little off, and the code is saying only one cylinder is misfiring. Not sure at all what this could be, I thought I blew my motor and then it fixed itself. No smoke out of the exhaust or oil leaking at all, coils are all still attatched well, alternator replaced recently. Engine is tuned by previous owner pretty sure. Any help is greatly appreciated!