Nissan Navara - Fuel economy / Towing

Submitted: Saturday, Feb 17, 2007 at 18:56
ThreadID: 42425 Views:12485 Replies:4 FollowUps:0
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Just hooked up the 1.1t Evernew van to the new Navara (td 6sp manual), for the first time, and took it from Mooroolbark (Melb) to Mansfield (NE Vic).
This was the first time we had towed the van and was particularly interested in looking at the fuel economy rate.
The car, new in Oct 06, has only done 3800ks and has so far worked out at 8.5l/100km. Very happy with that, as 90% of this distance was done with cruise control and absolutely full of camping gear and sitting on the posted speed limit.

The van is an on road type pop top that we intend to use as our base and from there go out with our camping gear etc.

The route from home to Mansfield covers both reasonably flat areas and some long winding hills as well. Nothing that you would hardly notice with the car alone but certainly noticeable with the van. The 153ks to Mansfield worked out at 12.4l/100km. That included the vehicle, van, full water tank (80L) food and a large chunk of our camping gear. We are very happy with that also.

We intended to travel along at say 85-95kph but found that sweet area at exactly 100kmh and 2000rpm in top. As a hill approached slightly increase approach and as soon as engine drops below 2000rpm drop back to 5th and again sit on the 2000rpm mark. In 5th, this worked out at exactly 80kmh. Only once on the trip did we have to go back to 4th (60kmh at 2000rpm). It's funny how the gearing worked out perfectly for the majority of signed posted speed limits. Sit on 2000rpm or more and your right on the money for maximum efficiency, smoothness etc. We were very wary not to labour the engine especially with that long legged 6th gear.

Previously, we had towed the van with our GU Patrol and the new one has exceeded our high expectations. Would suggest it to anyone thinking of towing a van around this weight. Mind you I wouldn't like to tow with it's maximum limit of 3tonne, that might stretch the friendship.

One thing though that I am still coming to grips with is the external door mirrors.
The left is the usual "closer than they appear" type, but the right is as well and I think slightly concave. You can see lots around you but the vehicle is quite long and the mirrors "show" you about to hit just about everything when attempting to park.
To this scenario, add the add on mirrors for towing and boy what a dog's breakfast
of visions. It does take some getting used too. I would much prefer to have a normal right hand mirror and place on it a small round concave mirror. That's my only gripe with the entire package. Perhaps Nissan might have this as an option.

Cheers, Wayne.

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Reply By: barney rubble - Sunday, Feb 18, 2007 at 02:29

Sunday, Feb 18, 2007 at 02:29
Gday wayne your obviously aware of not labouring the engine/box in 6th gear would i be right in saying 5th gear is now similar to what you would previously have used 4th for or is 5th an overdrive and 6th an overoverdrive hope this makes sense
one for the gearbox gurus perhaps cheers
AnswerID: 222385

Reply By: Macca_GU - Sunday, Feb 18, 2007 at 13:14

Sunday, Feb 18, 2007 at 13:14
G'day Wayne,
I had previously checked the gear ratios thinking it would be nice to have a six speed in the series IV GU for some longer legs, but when you look at the ratios for the Navara, not much in it really, just squeezed another ratio inbetween 1st and 4th, a little creative engineering perhaps. But prob works for the better when towing. It's only the lower ratio in the diff that makes the Patrol rev a little higher than I would like on the 110 kph sections. Also I agree with the drivers mirror, a standard mirror would have been preferable, but that's just my preferance, a minor issue in an otherwise awesome vehicle. I notice the Navara has over 400Nm of torque, pretty good for a 2.5TD, hope you enjoy your vehicle.

Navara 6th = 0.827 5 th = 1.000 Diff Ration = 3.538
Patrol 5th = 0.836 4th = 1.000 Diff Ratio = 4.111

Cheers....Greg
AnswerID: 222450

Reply By: Member - Stephen M (NSW) - Sunday, Feb 18, 2007 at 22:15

Sunday, Feb 18, 2007 at 22:15
Hi there Wayne, my wifes new toyota has the same mirror on the drivers side as the passengers . I have written a formal complaint to toyota.These mirrors are absolutely ridiculous. They are a danger, even though I always look over my shoulder it is a lot harder on the drivers side as you have to spin your head twice as far to see past the c pillar of the vehicle. Crazy is all I can say. Waiting for a reply from toyota but wont hold my breath. I am going to take to a glazier to get him to cut an exact size mirror and stick over the top of it. Steve M
AnswerID: 222572

Reply By: True Blue - Tuesday, Feb 20, 2007 at 18:11

Tuesday, Feb 20, 2007 at 18:11
Thanks everyone for your input. I have changed from "GU" to "True Blue", the name of our Navara, and as a consequence was unable to respond on the forum for 48 hours.

Just wanted to highlight how the 6 speed was suited to keeping the engine in the right rev range, albeit with a van in tow, whilst delivering great economy.

I knew with an extra gear, different diff ratio, different torque curve, lighter vehicle, etc. that there would be a big difference. I was happy with the Patrol which would cruise at 100kph at 2600rpm (3litre TD manual) but the Navara is more refined, quieter, and a more relaxed tourer.

Thanks again for your comments, all the best to you all.

Wayne :)
AnswerID: 222955

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