Hey guys my check engine light came on again. I took it to auto zone today and had them pull the code and it was P0301 Misfire in Cylinder number 1 the thing is i had new spark plugs and wires installed and a recent tune up .
I am having the same problem, except mine is cylinder #3. My problem is that I got a bad tank of gas (others from the station had the same issue). I put in a bottle of drygas and some STP gas treatment. The light hasnt come back on again, and there is still some hesitation when I open it up.
93 Octane will definitely not hurt your car. It will just hurt your wallet at this point more than anything else. The higher the octane the greater the resistance to self ignition, so the less the chance of a misfire. Put in some new fresh fuel, and some water remover to treat the old stuff and see what happens.