Roadsters are not generally noted for their fuel economy, but the Mazda MX5 may well be the exception that proves the rule.
This week I went on a brief overnight jaunt interstate across a range of roads, and without driving with any consideration for economy.
The MX5 averaged 6.93 litres/100km, with a best of 6.7 litres/100km from Glen Innes to Tamworth. Much of this road is characterised by long climbs, during which I downshifted to fifth to maintain momentum.
The fuel I was using was a mixture of 95 and 98RON. You can't buy 95RON (which is what I run it on) in NSW without ethanol. I prefer to avoid the blends, as the car wasn't built for them. It likes 98RON and seems more responsive (and more economical) using this fuel. You do pay through the nose for it.
The most enjoyable aspect of long distance motoring in this car is that it can be driven in two different modes.
You can put the top and the windows up, turn on the air and the stereo, and drive it much in the same way as you would a sedan. In this mode it's comfortable, not too noisy, and relaxing.
Or you can put the top and the windows down, leave the radio off, and take in all the smells and sounds this liberates. This was the way to go through the wine country on the granite belt.
With the wind in the right direction, you could smell the vintage.