great times! I think in the same conditions, the 6 would run similar numbers... but yeah, the eco is a great engine. If I were buying my Alero today, I would definately get the eco.
We were running high 15's and low 16's on 3400 aleros in 90+ degree heat with poor traction. The eco and twin cam guys were running mid to high 16's.
It'd be interetsting to take my car down to englishtown and run it in the cool weather to see what she has