It's the 2007 Mazda3 in my signature. I am doing some data log on this car just to see what's going on with the Mazda3 after I replaced the O2 sensors on my Mazda MPV. The car has no DTC, and drives well. One thing stands out is the high LTFT. It's about 7-9% at idle, and can go to 15% at load. For those of you who monitor your Mazda3, what do you see for your LTFT? The car is a 2.0L 4-cyl engine, has one A/F sensor, and two O2 (narrow band) sensors downstream of exhaust. I don't think high LTFT is normal, but it's probably not out of whack yet to set DTC. I had an Innova 3130 for a long time, but it's very limited in terms of graphing live data. I am getting a OBDLink MX+, will play with it once I get it on my hand.