[Seven Of Nine]

Think with the Greddy you are looking approx 50hp more than stock, but that can vary might be more or less. As for the oil not too sure coudl just change once a year like the cars engine oil <shurg> but it might be specific oil for the charger. Note:- if you go with the stock piggy back ECU Greddy supplies your car will run lean, ideally you need to upload a better map or take it to your tunner to get the most out of it. I know you can change the pulley to give you more boost, but again if you do this you obviously need a retune.