I havent really driven much highway and didnt reset my MPG but I think I get around 22mpg on the highway... before I got maybe 25... but I havent really tried to get the best yet... someone else can chime in whose had theirs in longer

 

4.10s are a great mod that you''ll enjoy. But for track times with an intake and tune u shud be running low low 13s on the stock all seasons as long as the elvation and weather ate too bad once u add the 4.10s your going to need some goood summer rubber and ull be in the high 12s or you could go wit dr ud obv run better time but if ur not drag racing all the time then y bother