Nissan Navara 2011 Problems

Tell the dealer of your concerns when you take it in for servicing and ask that they do a full diagnostic check on the car. Don't accept their view that it's still running in, that's a way of fobbing you off. It's possible you have a faulty sensor that's throwing the fuel economy out.

The owner’s book will tell what oil you should be using, but it’s generally a high-grade gear oil, like 81-40 GL5.

Fitting an external cooler would do no harm, it can only help. The other thing to keep in mind when towing is not to let the gearbox lug in overdrive, but change down when the road demands it.

Your cheapest course of action would be to fit a non-factory clutch kit and don’t replace the dual-mess flywheel. That would cost you around $600, but wouldn’t be my recommendation. A non-factory clutch kit with a replacement dual-mass flywheel would cost around $1800, a similar cost to an equivalent factory kit, but the best course of action given that you tow would be to fit a non-factory heavy-duty clutch and a solid flywheel. Cost for that would be about $1800.

My experience is that the D40 Navara is quite a smooth riding ute, sure it’s designed to carry a load, but compared to, say the old D22 Navara, which was a bone shaker the D40 is very smooth. It’s very unusual for a tyre to develop flat spots in a short period of time; the vehicle would have to be sitting for a long time for that to happen. Goodyear Wranglers are generally regarded as good tyres. If you wanted to try other brands, try B.F. Goodrich or Michelins.

My contacts say there is no problem with the chain on the D40, bearing in mind that all chains will stretch over time, so you have to suspect the service guy is trying to sell you something you don’t need. On top of that there should be no difference between the Spanish sourced model and the one from Thailand, as the engine is the same in both.

Have you checked your invoice to see how much oil you have been charged for? It could be a case of being overcharged for oil you don't need, or it could equally be incompetent service staff simply overfilling your engine.