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I was wondering what gas mileage would be normal for my 06RT. This is my 2nd one (First one got totaled a few months back) and it seems like I am getting worse gas mileage. Right now, I am reading about 12.6 MPG but that is with mostly inner city driving. If I take it on the highway, for even a 20-30 min trip, it will bump up to about 13.4. I can admit that I do drive it quite hard occasionally but still, I wouldn't expect the MPG to be that low. Like this morning I started the car and it was at 12.7 By the time I sat for like 12 mins to let the engine warm up, I was down to 12.6. On my other one, even with heavy city driving, I was getting about 13.4. a few highway trips it would bump up to the mid 14's. I could be over reacting but I am just wondering if I should be concerned. There were no codes or any issues last time I was at the shop. I am not sure if it matters that I recently got a tranny pan service. I cant say it got worst since because to be honest, I didnt check before. Just wanted to know if anybody has any advice. Lastly, no real upgrades, just loudmouth resonators
 

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You're average gas mileage is going to vary. I'm pretty sure mine is normally in the 13 MPG area, although right now it's at 15.4. So I guess I've been driving like an old lady :). If you've been on the highway more it'll be higher. Anyway, I've heard lots of people say that you can't trust the EVIC's average, that it's inaccurate. Best bet is to fill up, drive, fill up again and divide miles by gallons.
 

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The onboard fuel economy gauge isn't really useful for much more than getting you all worried and driving you to post on forums. <Grin> Seriously, it's a approximation only and shouldn't be used for... anything.

What you need to do to calculate mileage is... calculate mileage. Log your odometer reading when you tank up. Drive. Log your odometer reading when you tank up. Drive. Do this for a few tanks, then do the math. If you fill up X gallons and you drive Y miles, divide Y by X and you've got MPG. Real MPG. The MPG you actually GOT while you were driving.

Remember that simple things such as terrain play into mileage. Where I live things are very, very flat. There are zero hills, so I can drift a lot. Uphill/downhill cycles are less efficient.

In general, unless there is something very wrong with a particular car, mileage variance is due to external factors. How you drive, where you drive, when you drive, and how ass-tastic the gas you're burning is. Things you're not likely going to change.
 

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Discussion Starter #5
Makes sense. I will do that the next time I fill up and see where my mpg is. Thanks for the responses everyone
 

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Like everyone else said, the best way to calculate it is by actually calculating it, not using the EVIC. I use an app on my iPhone called Road Trip. It keeps track of MPG, maintenance, etc. Pretty handy.

Now, I hope I read that wrong, or maybe you mean something else and just wrote it wrong, but you don't actually let your car warm up for 12 minutes before you drive it, do you? Did you mean while sitting in traffic?
 

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The evic is always Lower than actual. You will notice that key on engine off your mileage will drop.
Actually my EVIC is always higher than my actual MPG, usually by a little over 1 MPG.
 

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Crappy programming makes anything possible I guess. My 2001 olds aurora was spot on, so it is possible. So tosum it all up...YMMV!
 

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So to correct my earlier post It's MY evic that always reads low, but they all seem to have some degree of inaccuracy. I personally us it more like a compass to tell me which direction my mpg is going. I watch it more than 50% of the time.
 

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My 06 Daytona on average gets around 17 but at times I have seen it hover at 20. This is according to EVIC which is the only calculation I use. The biggest thing is auto-stick. Don't use it and your mileage will increase by about 2-3 mpg. If I hit the auto-stick a lot it drops to 15. 15 is about the lowest I see it.
 
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