I drive city pretty much nearly 80% of the time and my mpg has decreased maybe 1-2 mpg at most. But if I go on a long drive or highway for long stretches of time. I can still easily do over 34/35mpg.
I’ve been tuned for about 3 months now.3/4K miles worth of driving.
there aren’t tons of...
It’s not a placebo effect. The car is much quicker and response is better. Driving experience is night and day. Don’t floor it every chance you get and drive like a moron and your car will be fine.