Is my new car economical? How does a Mazda 3 compare to other small cars?

And fair enough. If you think of a car which averages 10L/100km, driven 15,000km a year and filling up at $1.25 per litre, it will cost you about $1875 per year.

That’s about two-and-a-half times the annual registration fee, and potentially 10 times the yearly service cost of a small car like a Toyota Corolla.

So, what constitutes a fuel efficient car?

CarAdvice reader Tim asks:

The basic answer here is that all new cars are required to state a city, country and combined fuel consumption claim. These figures come about through a standardised testing procedure, sometimes performed locally, sometimes overseas.

Now, we know as well as anyone, the consumption claim made by manufacturers is only the first piece of the puzzle. Driving style and conditions can vary dramatically between two different people, as can the use of fuels, loads, and even tyre pressure (which affects rolling resistance).

But, with all things considered, the claimed consumption figures do work well as a guide.

How does Tim's pick, the Mazda3, stack up against the competition?

What follows is a table showing all makes and models of new small cars currently on sale. Without going into fine detail on engines, we have selected the lowest combined fuel consumption for each available fuel type.

You can see that, at 5.7L/100km, the Mazda 3 is actually the second-best among cars that can use regular unleaded petrol, behind only the Suzuki Baleno.

We’ll ignore hybrids, as they will obviously be more efficient. Likewise diesels, as the Mazda is no longer offered with a diesel engine.

Now, let's combine all petrol-engine cars to see how the Mazda ranks.

When viewed alongside the three-cylinder options from Mini and Audi, and sub-5L/100km claims from the small turbo-engine Alfa-Romeo Giulietta, the Mazda moves a little down the ladder… but not by much.

The average for the segment, for all petrol-only cars, is 6.3L/100km, making the Mazda 3’s claim much better than most.

As for meeting that claim, well that’s over to you. Good luck!

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