Elise S1 Range

[Haves1979]

I've recently bought an S1 Elise (118bhp) and will be taking it down to the FOS (350 miles). Just wondering what sort of range to a tank I can expect on a steady(ish) motorway run? The fuel gauge seems a bit erratic so thought it would be good to have an idea of how often I'll need to fill up (roughly).

Also, how many miles can you expect to when re-fuel appears?

Cheers

[Haves1979]

Cheers many thanks!