and don't forget Direct Fuel injection, and VVT, also a little better gearing. All of which boost fuel economy considerably...
Also- GM stated themselves on one of their engine spec sheets (so it's not just me saying this) that AFM advantages really kick in when your doing exensive highway cruising...different than EPA "highway". Think about it - it makes sense...driving practically a 4-cyllinder at 55-70 (I'm a good boy
), Your talkin' 34- (maybe - wishful thinking) 40 mpg....IN A CAMARO!!!