Injector service life.

I think it also depends on the actual use of the engine, engines in trucks are usually running continuously, like a taxi, 8 + hours running every shift which stops the cold start wear and everything is running at optimum temps and is serviced regularly.
The average 4wd in private hands if used like a car does lots of short runs, stops and starts, sitting in traffic etc which increases wear and shortens service life.
I decided over 20 years ago that it was better to buy an older car for the around suburbia use and keep the 4wd in the garage for weekends away and longer trips. I've never had the pump or injectors serviced on any of my diesel cruisers, usually takes ten years to get up around 200k and then I sell it and buy a younger one.
Do the servicing at the required intervals, change fuel filters at regular intervals, keep the aircleaner element in good nick and only try to buy known good clean fuel and they run ok for years.
A diesel engineer told me years ago that if you got them checked/cleaned and adjusted at regular intervals like 70 - 80k they would last for probably upwards of 250k before requiring new tips, if you did nothing till 250k then they will still need new tips but you may have suffered a decrease in economy and performance for the latter 150k.
That of course applies to the old style diesels where the injectors are serviceable, the new common rail electronic ones are not usually serviceable and have to be replaced at huge expense.

Hi

Every 100,000kms is the go for a L/Cruiser

Glenn

A diesel mechanic once told me that the greatest shortener of injector life in 4WD and diesel cars was drivers wanting them to start like cars. He said they will fire up on quite short prewarms and most drivers tend to underwarm them before driving off and this considerably shortens injector life. He suggested making sure the full gloplug warm up time was always used, plus 5 seconds more.

pre 96 with australian diesel it had a high sulphur content and it was advised to check injectors and delivery valves every 100000
todays diesel is low sulphur (so less corrosion around the injector nozzle) but some injectors as with direct injection may not have to be checked at 100000.

The big concern nowdays is the common rail computerised injectors vs the older mechanical style. To me the mechanical style injector is a winner in certain enviroments, you can service it easily and keep it working optimally or buy a new one affordably. I am being told the newer common rail injectors are not serviceable albeit mine were cured by soaking overnight to address a rough injector as apposed to buying a new one for $1000 or thereabouts.

I don't like the idea of injectors not being serviceable and then asked to pay ridiculous prices for a new one. To me common rail technology does not justify the price hike nor the serviceability restrictions, I can hope this changes..

Interesting site on Common Rail Diesel, seems to be a push for a service centre in Brisbane.

http://www.commonraildiesel.com.au/