Pt.2 i had a P0300 come back and I put octane booster in my tank and ran it and it did fine and didnt have issues or anything and the P0305 never came back but when I went to fill up my gas tank with 93 gas it started random missfire "P0300" again but I put octane booster it started to run fine and I deleted the code again so I can pin point it more. Any info what could keep this coming back let me know please.