Yep.
...............slightly surprised tbh. I thought an MX5 would have been higher than that. :-/
Ours does about 38 MPG on a run. Probably low 30's around town, and considerably less bouncing off the rev limiter trying to keep up with a group of kit cars. 
That's a Mk 2 1.8.
Evening Kevin. Mine's a late (97P) Mk1 UK 1800 3 owner car, just turned 101k. 99k when i bought her a few weeks ago but what with Mum leaving us she's been shuttling from N.E Lincs to W Sx without missing a beat, totally dependable little motor. When i bought i her saw a newish oil filter, dipped the oil which was up to the mark & golden. Still is now, has'nt dropped or turned black, even the water level is the same. 6 months T&T, new Pirelli P6s all round, plenty of history, last owner 9 years, he paid £7600. £995 on ebay.
I could probably get better mpg with the roof up & the lights down but by thier nature the do encourage spirited driving. They're just so cheeky & playful, you almost feel they've got a grin on thier little faces so 30+ mpg is'nt too bad. 8-)