Is there a big difference on mpg between 355/360?

[bund]

As thinking of doing a 3000 mile rally

[bund]

obviously, im worried about... keep having to pull over and fill up and see the 575 and cl55 amg go flying past.......

Last year i done it in my 977s and was making good pace but kept pulling over for fuel(230/250 a tank), oh yer and the french police kept pulling me over for something too.

[bund]

Worse of all a saab estate won the whole 5 day tour, the 575 had engine problems and pulled out. So i managed 3rd due to my mates problem.

[bund]

thanks, i dont know anything really about either car leading to why i had to ask.

[bund]

oh really, spose your right shouldnt be any better than a modern 997.