Fiat 500 Twin Air 69mpg??

[euromodder]

Originally Posted by twinair

I'm not sure why you mention diesel, as it does have a gasoline engine

My mistake. Soooorry

[Occasionally6]

It might be worth looking more closely at diesel style driving techniques though because the Twin-Air is aimed at reducing pumping loss. Perhaps more like a diesel than gas.

[twinair]

In order to be fuel efficient, you need to minimize the time running this engine in boost.

As opposed to a diesel engine it's definitely not suited to run at high speeds on the highway (as far as fuel economy is concerned).