Last post on Jul 27, 2012 at 1:44 AM
You are in the Mazda3
What is this discussion about?
Mazda MAZDA3, Mazda MAZDASPEED MAZDA3, Fuel Efficiency (MPG)
#960 of 961 Re: my 2012 mazda 3 itour auto skyactiv hatch mpg [kmh3]
Jul 26, 2012 (2:17 pm)
I want to retract my previous claim that using the air drops mpg by 10mpg.
It does drop that much when you first engage the air, but the average mpg doesn't drop any where near as much, maybe 3-4 mpg instead of the 10 I thought I was seeing previously.
That means this car has no bad points for me, the air is nice and efficient although not super powerful, exactly what you would want in a car tuned for high mpg.
I wish I could edit my previous post to remove bad info.
#961 of 961 Re: my 2012 mazda 3 itour auto skyactiv hatch mpg [kmh3]
Jul 27, 2012 (1:44 am)
A drop of 3-5 mph when the a/c is engaged is about what I'm accustomed to seeing with my '05 Mazda 3i w/5-speed manual also.
The a/c compressor seems to consume most of the torque produced by my 3i's 2.0 L engine, especially at low rpm. If the compressor engages while I'm accelerating or climbing a hill below 2.5k rpm the feel is comparable to driving w/the emergency brake engaged or as if the car may be towing a trailer. At higher engine speeds the a/c compressor's effect is less noticeable, but I can still view the negative effect on my Scangauge II's instantaneous and average calculated mpg results. If engine rpm is below 2k my car simply falls on its knees when the a/c compressor engages.
I'd like to see Mazda and other manufacturers begin to offer a/c compressors powered electrically vs. directly by the engine (rpm dependent) like Toyota is using on its hybrid vehicles like the Prius.