In the old days, gassy smelling oil could me a ruptured fuel pump diaphragm, miss-adjusted choke, stuck needle valve, too much short trip driving, misfiring ,or too much fuel pump pressure.
I once had a young man going out with my daughter who got stuck at my house with a flooded engine in his Rambler. He had just put a new fuel pump on it. I checked the pressure from the pump and it was reading 13+ psi. His car had a spec of 3 1/2 to 5. I drove him to the parts store to exchange the pump and went to work. The next day when I got home, his car was still at my house. He had changed the pump twice and it still flooded. I asked him why he had changed the pump in the first place and he said someone had told him it was time to change it. I went and picked him up and he got his old pump out of the trash and I installed and tested it and the car ran fine. The parts store had been selling him the wrong pump.
Given that you drive a fair amount, I don’t think it is short trip driving and you didn’t mention miss firing so it is probably leaking fuel injectors. Does your car have to crank longer than it used to before starting?