I'm getting 11.3L/100km here but I do drive very spiritedly and live in a big city with VERY heavy traffic. Had a TRD air filter installed but not much difference in terms of fuel consumption.

I didn't notice any change between filters....

Temp swings and or the use age of the ac and your right foot have large impacts.

I'm usually around 28-30 calculated or 32 on the readout.

I have a Perrin drop-in and have noticed zero change in mpg. My dash readout has been pegged at 33.3 for the last few tanks, with the actual mpg being whatever is in my sig.

I run a K&N drop-in and Q300 catback. Mixed driving yields around 35mpg. 37 with heavier freeway driving.

http://i.imgur.com/pEXijEW.jpg

its all about driving habits. i was averaging ~30 mpgs before my exhaust went on. now its ~25...... lol

Ahhhhh! Don't tell me that! I'm at 30 mpg now and my catback is en route.

It's not that it will directly affect MPG, you'll just want to put your foot down more often. :P

What application is that?

I'm in the private beta for Automatic, found at Automatic.com. It's been great so far, but no support for really detailed info out of the OBD port. Definitely for general consumer use.

That app looks like it might call the police if you get freaky in the car on the road.

I don't think that's all true - must be other factors.
my catback didn't change a thing - I was getting 35-40 on the stock tires.
when I changed the tires/rims - then that will mess sht up bit time. just saying.

i was saying my mpgs went down because my foot was also going down. hard.

...lol

Only in the event of an accident. Things like spinning out, etc. are not reported. But if I plan on tracking or being a little crazy, I can always unplug the device from the OBD port temporarily and all is well.

Luckily I tend to not do anything stupid in the street.

I noticed drop of about 1 l/100 which is about I bekieve 2-3 mpg after I installed the drop in. Pretty sure I installed it right. Spent a fair amount of time for full seal and proper box alignment.

Have winter tires vs summer tires and longer trips of highway. Will spray maf cleaner and reset ecu in the summer. Will lyk.