My wife's Nissan is an 05 GU 3l turbo soon due for a 150,000 service. This vehicle blows black smoke but only at start up. No smoke is evident later or under load. Fuel consumption is within normal boundaries (about 10.5 litres/100 kms) and power once turbo kicks in is good.
I haven't read the article yet but does anyone know what may cause this.

Cheers, John