what could cause my avg mpg to drop .3 in 2 miles?? dealer screwing me over?

[fluffy-reindeer-slayer]

so I picked up my car from the dealer after being there for a week for some issues I had with my body kit and also to get my five ad wheels installed, when I got the car back it had 2.1 extra miles on it wich is understandable considering they probably had to drive it after wheels were put on. my question is my avg mpg whet from 33.2 to 32.9, .3 diffrence, that posted a red flag in my book, I talked to the manager of the servie department regarding the issue, and he said it was from the car idoling for a long period of time while it was there, i replied why would my car be idoling when wheels and tires are installed? he had not definate answer, needless to say i had a few choice words for him. so my question is, is this a logical explanation on the dealers part? or did someone just take my car out for a magor joy ride.my car had 1580 miles on it and I drove it back home 20 miles and the avg mpg meter did not move at all.

[artizhay]

Always the dealer's fault, eh? Jeez, just drive it around for a few days and see what happens.

[kuma]

I think you're panicking for nothing. It's just 2.1 miles. I'd be concerned if you valeted the car and it had that many extra miles.

Anyway, your average mpg will vary! It's just 0.3 difference! It's not that much. If you give the car a little extra gas every now and then, it'll do that. Especially if the tank was close to full, it'll vary your avg. mpg. I think you're freaking out about nothing buddy.

Take a chill pill and relax. It's Labor Day weekend.

[whaap]

You're expecting too much from your dealership. It's likely they drove your car to lunch and on the way there and back tried a little drifting.

[Lytheum]

probably just idling. getting 0mpg will cause it to drop rather quickly.

[FBaxteR-S]

You lost me after

idoling

[sdshores08]

The average would also drop if there are a lot of stoplights near the dealership. Traveling a short distance in stop-and-go traffic would bring it down.

[Zaggeron]

It also depends on when you reset the mileage. If you had just filled up and reset the MPG gauge (I always reset after a fill-up) Then small bouts of less than average gas mileage will quickly lower the average. For example, I usually get around 29 MPG on average for my commute. I filled up before my commute and was reading 30.x MPG afterwards. The next day I was in a traffic jam on my way to work and in two or three miles the avg. was reading 27.x. It bounced back up by the end of the commute and by the end of the tank, I was right at my normal average.

[Juan@aePerformance]

did they swap your tpms over to the new wheels?

[_hollywood]

I think you should be driving a prius,

I got 8 mpg when i did about 4 doughnuts in the parking lot earlier today

[jeebus]

Jesus man, a car's average mileage drops significantly when it's just sitting around idling, or being parked, etc. You lost almost nothing (.3). If it dropped 15MPG, then I'd be concerned.

[S2kphile]

Chill out fellas. Everyone is currently 'anal' about their cars at the moment. I agree with the statements above it's probably because it was idling which most shops do.

[gmookher]

ofcourse they did a little post service testing, and no they didnt warm it up..LOL

[fluffy-reindeer-slayer]

Originally Posted by Juan@aePerformance

did they swap your tpms over to the new wheels?

yes they did