Fuel is regular 87. The resume button on the smart cruise control will resume the previous speed as long as you haven't turned off the cruise control. Example, you have it set at 65, you tap on the brakes which disengages the cruise control, you're now traveling 50 and hit resume, it will take you up to the previous speed of 65. You have to be going over 20 to resume. The benefit is you don't have to set speed and click up to set it from the current speed to the desired speed it will you resume to your last desired speed as long as the cruise control has not been turned off.