YES YOU CAN USE REGULAR,BUT I WOULD NOT.ACCURA RECOMMENDS PREMIUM,BUT MOST PEOPLE DO NOT USE IT BECAUSE OF COST.ASK DEALER WHAT THEY WOULD USE,BET THEY TELL YA PREMIUM.USING LOWER THAN RECOMMENDED OCTANE WILL RUIN THE VALVES EVENTUALLY.SO IF YOU DON'T CARE HOW LONG THE CAR RUNS.....USE THE CHEAP STUFF.BUT THAT WOULD NOT BE SMART...........GUY.