This is not as simple as perhaps it should be. Different carmakers use different methods to calculate cargo space, and Mazda uses the VDA method which uses 200mm X 100mm X 50mm blocks to determine the volume. In this case, the CX-5 has a volume of 438 litres with the rear seats up and 1340 litres with the seat folded down.

However, you need to know the dimensions in centimetres, so here’s how it pans out: The CX-5 has a luggage space length of 89.7cm with the rear seat in place, 171.5cm with the seat folded, a luggage space height of 82.7cm and a width of 105cm at its narrowest point.

Perhaps that helps, but the best way by far (if possible) is to visit a Mazda showroom with the wheelchair in question and physically see if it fits.

The problem of the sump filling with diesel was not unknown on early CX-5 diesels. A leaking injector is possible, but the main cause of this was believed to be the car’s DPF regeneration process dumping large amounts of fuel into the engine, some of which finds its way past the piston rings and into the sump. Either way, a new engine is a large expense.

There’s every chance that Mazda won’t offer any help given the age of the vehicle, nor is this type of engine damage usually a cause for an insurance claim. It would definitely be worth contacting Mazda Australia’s customer service division, but don’t hold your breath.

Proper maintenance is overlooked by many car owners, and it’s a real problem. Modern engines work very hard and have lots of intricate oilways and mechanical clearances that simply won’t tolerate dirty oil. On paper, the car you’re looking at hasn’t had clean oil or a filter change in 20,000km and that’s an awfully long time between drinks. In fact, it’s enough to perhaps give Mazda cause to void any new-car warranty remaining on it, should something mechanical go wrong.

Your best option would be to find another CX-5 with the options and in the colour you want, but with an up to date and complete service record. That’s the best way to prevent any major disasters down the track. The good news is the CX-5 was a popular model, so there should be lots to choose from.