Are any of you guys in here paid attention to the "Trip Computer" mpg readings. On my Z the average reading is 24.9 mpg. I think this is a very good indication that my car is running "Lean", would you guys agree with me. As you can see on my Sig, I have a few aftermarket components installed on my Z and I will like to know from the N/A Z guys, what is the mpg on your cars and how strong your car is running. Thanks in advance people.

 

I wouldnt trust my in car comp to tell me what my A/F is, either get a gage (not that u need one) or get on a Dyno (If you have to know) or take a plug reading/exhaust residue reading.

 

the in car gauge means nothing, when I fill up mine will say I can go 600+ miles and get 38mpg sometimes. The only way to accurately tell your mpg is the old mileage divided by gallons.

 

^^^ Your bigger injectors will skew that calculation, and your Emanage won't help it at all either!