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I'm looking at Isuzu Mu 3 litre diesel that's done 170K.

I've only ever had 2.0 litre or under petrol cars.

Is the diesel going to be as costly to run as a large petrol car after the Road user charges? Also, I've heard they are good for higher K's useful life than petrol (actually that was for trucks).

What do you think?

Steve

From the "Ask Jack" archives - 14 December 2009

The Mu was a popular choice a few years back but is starting to get a little dated now. Diesels do have a good reputation for long life; provided they are serviced regularly as per the manufacturer's recommendations.

The original service period for a vehicle like the Mu could be as low as 3 months or 5,000kms (which ever comes first). Remember servicing costs can be more expensive because of the amount of oil they need and the cost of filters etc. Also a major overhaul on a diesel engine can also be double that of a petrol.

Diesels become a good option when you are travelling higher than average distances. They're more economical and even when road user charges are included the fuel prices are cheaper.

Diesels have come a log way in recent years, unfortunately the Mu would be considered to have been manufactured with old technology, so your repairs and maintenance could wipe out any gains in fuel costs.

Be careful, get the vehicle inspected before you commit. I don't know your budget constraints - but sometimes you are better off going to a more modern petrol or diesel vehicle. You may be better off in the long run.

If you don't have the need for a big engine-powered vehicle then don't buy one is my view.

Fuel costs are likely to get higher and hourly rates at garages are climbing.