So hi again but I have question on my rpm display on the digital display how can you change what it says like it used to say the amount miles i would get on a full tank now I thinks its the temp outside.

 

Depends on the car. If you have OBC, there's a little button on the top of the left stalk. Press it and it will rotate through time/temp/miles/mpg

 

Sorry to ask but what is a obc and my mini is an 03 of that helps

 

On board computer.
The little button on top of the headlight stalk cycles thru the readouts.
Here's a NAM thread from a while back asking the same question with lots of input discussing various year and model options. I'll bet you'll find your answer there.
https://www.northamericanmotoring.co...how-mpg-2.html

 

You have the OBC (on-board computer). Press the button on top of the turn stalk to change the display.