That is a small gas tank, I'm curious what the MPG will be for V6 over 300 hp.

 

"The streamlined body shape, mirrors and taillamps contribute to smoother air flow around the vehicle, maximizing fuel efficiency and making the ride even smoother."

Maybe that's why the taillamps stick out like they do

 

There's got to be more than just the tranny diff there or that's a typo.

Either Lexus engineers didn't care about the weight or there's a lot of content that others in the segment don't have. Depending on options the IS could be the leader in the weight category - not a category you want to lead.

 

any dimentions of the vehicle?

 

Go here: near the bottom.

http://www.lexus.ca/lexus/experience...262T&year=2006

 

The reason the gas tank may be so small is to help out in track times. (IE 0-60 and quarter mile)

 

The 20lbs added by a tank 2-3 gal bigger is insignificant in any performance measure. More than likely it had to do with the packaging - probably didn't want to take away too much interiror or trunk room.