Very interesting......
I have been very, very, **** about my MPG montoring, and I simpy find it hard to believe that anyone can get over 28mpg when averaging 80-100mph on a freeway, shifting close to 4000 rpm, and actually exceeding 100mph twice.
The only reason I say this is from my own experience. I have been calculatiing my mpg religiously since day one. I am VERY **** on how I have been calculating the MPG of my xfire. I now have 8000 miles on it.
I have added the mpg pics to my gallery.
My experience shows that when driving 60-80 mph (95% of my driving is on freeways after rush hour) and shifting at 2500-3000 rpm, it is almost impossible to attain over 25 mpg. The downside to my MPG is that my air conditioning is running 100% of the time (you have to in Phoenix), and the outside air temp is always above 100F, but both of these may only impact about 1 or 1.5 avg mpg. Also, I use the highest available octane here in Phoenix, which is 91.
I ran mine completely (accidentally) out of gas once, and got to 392 miles, and that was seriously babying it the last 50 miles or so. That tank averaged out to just a bit over 24mpg.
I have a manual and I know the MPG numbers are supposed to be better on the auto (which I find impossible to understand-this must be a typo somehere in the DC literature that got propagated), but how anyone can average over 30mpg (RGT stated he does) is beyond me.
My data even includes the MPG I achieved on a trip down from a higher elevation, 6000 feet in Flagstaff to 1100 feet here in Phoenix, and I still only averaged a bit under 26 on that tank (and I started that MPG test AFTER I got up to 6000 feet :wink
. And I tried to get my MPG up on that one by driving conservatively!
What in the world is going on here? Bullseye stated he got a tad over 20, and that one makes sense. How many others are getting so much more than I is unknown to me at this time. :?:
As you can see from my chart, my xfire was averaging 21-22 mpg when new, and now that the engine is broken in and I have added the K&N air filters, I am averaging around 24.
Anyone else have some hard numbers?