Does anyone know what the gas mileage will be for the v6?

I don't believe that they have listed the mileage yet, but if you compare the G8 to the Caddy CTS - similar weight, RWD and same engine - the CTS is rated at 18/26

I thought I read somewhere that there were preliminary EPA numbers - 15c/24h for the GT.

But he's asking about the V6.

Right...

With the slight difference in the epa, interior/exterior upgrades and only about 3k more for V8, why get a V6?

I have to stick with a V6 because it's a company car - That's OK - It's not a Taurus...........

Here you go. http://g8gt.com/t2033/?highlight=epa+mileage
V6 17/24
V8 15/23