Something is seriously wrong if you are bragging about mpg on a Porsche forum.

 

You're probably right it's a software issue and I'd take it in and make sure it's not screwing up other data you may want to rely on.

ChuckJ

 

I'm with you, Dr. Bill!

 

52mpg does not sound fun at all. i have a great time at 14mpg

 

Exactly.

OP - you gonna take it in and have it looked at?

 

nah. It's just one of many bugs in the PCM. All other mpg displays are OK, only this one (all-time mpg) is messed up. Just posted this for general amusement.

 

Cool.

 

I did drive a tankful with the cruise set at 65 and got 34.6mpg. I did the math!

 

Just for chuckles, I'm now at 138.4 mpg! It also seems I drove 1328 mi in under a minute while managing to lower my average mph by 1

(BTW, it displays the same garbage no matter the language and unit setting.)

 

1328 mi in under a minute should qualify for some sort of land speed record - and 138.4 mpg even more so, considering your pace. I've seen your screenshot, so I'm willing to back you as a witness in your bid for the record books.