2017 Mazda CX-3 Pricing and Specs

That seems odd, but there might be a really simple explanation. I’d love to know whether you’re calculating your fuel consumption by working out how far each tank is taking you, or whether you’re relying on the trip computer in the car’s dashboard. If it’s the latter, the reason for your higher figure after a service could be very simple.

It could easily be that the mechanic test drives the car after each service to make sure everything is working as it should be. To do this, the tester is very likely to give the engine a couple (or more) acceleration runs with lots of throttle. It’s also possible the car is left to idle for a time for the engine to come up to temperature while the mechanic gets on with other things. Both these activities will lead to higher fuel consumption than you might experience in normal driving with no harsh acceleration or extended idling periods. Because the car’s trip-computer works out fuel consumption based on recent use, this treatment at the workshop will lead it to deliver a higher reading on the dashboard. That it happens only after a trip to the workshop is the big clue here.

To test this theory, drive the car normally for a week and see if the fuel consumption number drops. If so, you’ve solved the mystery. If not, you need to return the car to the workshop because something is not right and is causing the car to use more fuel.

It’s certainly true that automatics are far more common than manual cars these days. It all started decades ago when people decided it was easier to have the car shift gears for itself than bother to shift them manually. But there have been other factors, too. One is that modern automatics no longer represent the performance shortfall they once did.

Back in the bad old days, autos used to be less efficient than a manual, leading to less acceleration and greater fuel use, making the manual the natural choice for a keener driver. But modern automatics have really caught up and no longer hinder performance or increase thirst. In fact, the best of them can shift faster than a human ever could and, with eight, nine or even 10 ratios, they can be more efficient than a manual.

Turbocharged engines have also helped make the case for automatics and – generally speaking – turbo-motors often work best with an automatic where there’s no lengthy gear-change interval to allow the engine to fall of boost. And turbo-diesels which need boost to operate and don’t rev very hard in the first place, are a natural choice for an automatic which also works very well for towing and when driving off-road.

But there will always be people who prefer manuals (yours truly included) especially those who actually enjoy the physical aspects of driving a car. So while the manual transmission in your car will turn some people off, if you can find the buyer who wants a manual, you might find the rarity of your manual car will actually be a selling point.

You would like to think that sales personnel have the knowledge to advise you on issues like this and do so before you buy, but it seems they don’t. And yes you should have asked to be sure that your phone is compatible. Phone Mazda’s customer relations service (1800 034 411) and discuss the problem with them.