Sorry for going over old ground here.
I've read heaps on this issue, but I'm still not sure if I've got a lemon in the fuel consumption arena given what I'm doing, and I'm booked in to a Nissan Dealer for a warranty assessment tomorrow and I am after some ammo in preparation for the fob off.
I am a recently converted long term Toyota owner, and purchased my first Nissan: a 2008 Patrol GU - DX, 3.0L Common Rail TDI - Auto. Its pretty standard, having a factory steel front bar, and Warn winch, and Rhino 3/4 alloy roof cage. I have fitted dual batteries and thats about it.
In the first few weeks of driving it, mostly highway / freeway running at 100k or less (mostly about 80-90) I didn't get any better than about 15-16L/100k which really surprised me after owning an 80 series Cruiser of the 4.2L non-turbo variety which used to get about 11-12L/100k on the same trips, also fitted with full steel roof cage and drawers etc.
I have just driven down to
Adelaide via the scenic route towing an off road camper which probably weighs about 1000kg fully laiden. Although I expected to see an increase in fuel consumption, I did not expect to see between 19.5-20.5L/100k doing 90km/h on the
Hay plains and similar roads. This is what others seem to get on Fraser Island driving on sand......
I've read all about the issues with the MAF sensor and increased fuel consumption, but in speaking with the Nissan dealer when I booked it in, I raised this, and he seemed to think it may not have the correct engine oil and my roof racks would be causing it. Its only even been service by Nissan since new, so I can only assume they use the right oil, and I hardly see how a set of roof racks could make what I assume to be 4 L / 100k difference in fuel efficiency. I have also detected an oil leak in the front of the engine which they are looking at too, not sure if its related.
Has anyone had any recent success stories with Nissan in reducing fuel consumption stats ? Any hints I can use? Just by chance I read the latest 4WD Action mag which had a writeup on the Nissan 3.0L engine and usual issues which confirmed all the reports on the net I have read.
Thanks again for your time, sorry for going over old ground.
Matt