Originally Posted by
KevinD
Yeah, to me a 5.7 isn't that big..I grew up driving 350ci/5.7 motored vehicles, so. I'm still not totally sold on the fact that 4 cyl are "more" fuel efficient than 8 cyl. My 99 Z28, with the stock 5.7 LS1, and an auto matic 4 speed got 29-30 mpg on the highway. The CSRT4 has a turbo 2.5 4 cyl, with a 6 speed manual, and only gets 30-32 mpg on the highway.