Mazda 3 Problems

It’s not unusual for a car to do that on a cold start. That’s the way it has been calibrated and it won’t affect the life of the engine.

The Corolla is one of the better small cars, it’s both fuel-efficient and reliable, if serviced well and not abused. Others to consider are the Mazda3 and the Hyundai i30.

Unless you are buying a manual I would rule the Cruze out, the automatic is trouble in that model and not worth the risk. If you do but a Cruze I would choose the 1.8-litre engine. Others to think of are the Hyundai i30, Mazda 3, or Mitsubishi Lancer.

Diesels deliver their efficiency benefits best when on the open road, but it would still be more convenient for Uber use because they'd need to be refuelled less often than the petrol. The only thing I'd be concerned about re inner-city use would be the diesel particulate filter. If you only drive around the city, this probably wouldn't give the DPF the chance to cycle itself every now and again, which can lead to very costly repairs. If you do head out onto the motorway occasionally, this wouldn't be an issue. The new i30 is an excellent small hatch though, and I wouldn't hesitate recommending it.

I wouldn’t recommend the Cruze, there have been too many problems with them. The Toyota Corolla, Mazda3 and Hyundai Elantra are all good, reliable cars with plenty of performance for the class. Any one of them would be a good choice.

You could consider the Mazda3, Toyota Corolla, or a similar model from a well-respected brand, but your positive experience with the i30 should suggest the new model is the one to go for.

In order I would go for the i30, the Mazda 3, and the Golf, certainly if you value reliability highly, as you claim.

Virtually all of today’s automatic transmissions are ‘sealed for life’. That is, they are filled with fluid at the factory and never need checking or topping up with fluid. But the fluid does get hot and can be contaminated over time, so it’s a good idea to have the fluid changed regularly. Some auto transmission mechanics will say it should be done every 20,000 km or so, or every year, others will say something different. It is more important if a car has been used for towing, because the fluid comes under greater stress in that situation. But in your case, I would suggest you leave well enough alone and not worry about it.