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3.0 lt di fuel economy


cairnsGU
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Just wondering what economy liters/100kms

I've got Arab roof basket - 285/75/16 m/t - genuine bull bar and genuine snorkel.

I used to get around 800km on the main tank with would net me roughly 200 pet quarter.

Now I am only getting 400-500 around town with all the accessories. I'm thinking about taking roof basket off and seeing if it gives me some filuel economy back.

Any thoughts

Dan

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Hey Cairns, that seems a bit on the low side. I just got 550 out of the tank with the same gear plus towing the van for 400 of it.

That included going up over Cunningham's gap (powering in second up the worst part). And a pretty speedy trip home.

The basket will knock some off but nowhere near that much.

Edited by gottheshits
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Just wondering what economy liters/100kms

I've got Arab roof basket - 285/75/16 m/t - genuine bull bar and genuine snorkel.

I used to get around 800km on the main tank with would net me roughly 200 pet quarter.

Now I am only getting 400-500 around town with all the accessories. I'm thinking about taking roof basket off and seeing if it gives me some filuel economy back.

Any thoughts

Dan

Auto or manual?

Mines an auto, same tyres, always around 16 litres per 100, so im guessing mine is similar to yours.

I also have a full length rack, winch, bar, drawers choco full of stuff, no snorkel.

I took my rack off but it didnt make one iota of difference.

I think the 285s kill it, did you put them on around the same time as the rack?

I've also got a dtronic and am getting a 3" exhaust tomorrow, so it will be interesting to see if the fuel economy gets better and the turbo temps drop.

Overall, my fuel economy is crap, especially when i see similar getting around 10 - 11litres per 100k.

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I get around 10l/100 most of the time.. a recent trip to Sydney I filled up at wagga wagga after doing 1000km and I put 100l in. That was with a full car and that big hill out of Adelaide..

Wind makes a big difference to my economy.. a recent trip to the west coast for fishing into a 40knot headwind saw my patrol drinking the diesel..

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Its a manual. I pretty much put the accessories on very close togethet . And because I don't drive it much I've just noticed the bad fuel usage.

I'm pretty sure its the wheels that have zapped my economy. I did read somewhere once that people experienced poor economy after genuine snorkel installed.

Dan

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Hi,

Last fuel economy figure I got was 9.86l/100km. Most times I get 10,...l/100km. This is most doing long trips. I can get 850km from a full tank until the reserve light goes on, then I refuel with 86 liters. I have a 2000 Nissan Patrol GU, manual gearbox, european spec, only mod is 285/75/R16 BF A/T tires, 3 people inside and some tools in the back.

I've found if I stay behind 90/100 km/h I get the best fuel economy. From 100 to 120km/h (max speed in portuguese motorways) economy drops.

I usualy don't drive the Patrol around town. When I do it fuel figures can go to 11l/100km or more...

Edu

Edited by Edu
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I was going to say 285s kill it, but yours edu is running them with good results, there goes my theory!

Do you have 285s on dronus? I know with my 285s the speedo is exactly the same as the gps at 100kph.

Mine runs the same hwy or city, with the van on (just under 2 ton) i think it runs around 5.3 - 5.5 kpl.

I suppose for prolly around 5 ton its not to bad!

Wayne

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Nah I have 265/75/16 which is standard I think?

Mine are MT tyres and if I'm going for a long drive on the black stuff I'll pump them up to 40-42psi cold.

Looking back I wish I knew patrols had good fuel economy - I wouldn't have leased other cars for so long !

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Even at this time of year we have the a/c on in the patrol also which wouldn't help..I'll pump tyres up to 40psi and see how I go..

Dan

Tyre pressure makes a big difference IMHO. It won't ride as softly but it rolls a bit better.

Sent from my Galaxy Nexus using Tapatalk 2

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I have 265 75 16 at 40 psi with no roof rack. I have a factory bar,winch, draws full of crap, rear bar and Ying Tong e bay snorkel. I get between 9 and 11 kays per 100 on the open road, depending on how I drive and down to 13 if i push it in town.

EDIT, Update: I just filled up. Now with the roof bars , Pilot/Escort sign and lights fitted and about 200km of driving with the sign up I used 90l for 733km. Thats about 12.3l per 100

Edited by Bogmeister
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Hi Guys

Im running 285,75,16 MT, a full roof rack, 2 inch lift, Dtronic and its an Auto. On a recent trip camping i adveraged 11.5 Litres per 100 doing 100-110. Car was full of my camping junk with my Oztent and fishing rods on the roof also.

Around town i normally get high 12's low 13.

I've found The manual boost control and manual torque converter lock up improved my economy substantually.

Hooroo

2003 ZD30 Auto

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Hi,

Last fuel economy figure I got was 9.86l/100km. Most times I get 10,...l/100km. This is most doing long trips. I can get 850km from a full tank until the reserve light goes on, then I refuel with 86 liters. I have a 2000 Nissan Patrol GU, manual gearbox, european spec, only mod is 285/75/R16 BF A/T tires, 3 people inside and some tools in the back.

I've found if I stay behind 90/100 km/h I get the best fuel economy. From 100 to 120km/h (max speed in portuguese motorways) economy drops.

I usualy don't drive the Patrol around town. When I do it fuel figures can go to 11l/100km or more...

Edu

Forget to add, I run my tires with 3,0 bar pressure (~43 psi) while on road. This may help a little with fuel economy...

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Short drives will usually kill the fuel economy on diesels, as well as cause other issues, and addons like roof racks don't help. I average around 12.5/100km with my auto, but can get lower if I drive it easy. I always try to do a reasonable distance whenever I go out, so that everything fully warms up.

Cheers

Ray

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I took my rack off for a couple of months, along with the 3 ladders of course and it didnt make one iota of difference to my fuel usage.

I'm hoping the 3" zorst helps. Im also going to up the tyre pressure.

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Hi,

Don´t know if I'm the only one doing this but:

My european spec GU Patrol had 265/70/R16 tires from factory. My odometer was spot on and speedometer was reading high by 8/10 km/h. I checked this values with a gps.

After upgrading to the 285's I noticed the speedometer was almost spot on (at least in part of the scale, it's not linear) and the odometer was reading low than the real distance traveled.

I thought if the stock tires (265/70/R16) have a perimeter of 2,44 meters and the 285's measure 2,62 meters, this means for every rotation of the axle the car is "traveling" more 0.18 meters than before.

This may seem not a big difference but it's 6%, so for every 100km I have more 6km not registered in the odometer.

When I do the math in fuel economy figures I always add 6% to the odometer value to compensate this error, otherwise I'd be getting overfueling false figures.

Of course this is with stock differential ratio (4,375) and also with the standard speedometer pinion gear. If I change any of this the math will also change.

If you guys are using 35''s or your Australian factory tires are not the same as here in Europe you would have to do some corrections in your math.

I thing some of you upgraded to biger tires than factory ones but still rely in the "false" odometer values...

Well at least this is my theory...

Cheers,

Edu

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That's roughly what I've experienced with all of my Patrols. I find that the speedo over-reads the speed and the odo under-reads the distance. With my standard road tyres, the speedo is always showing about 3+ kmh more at 100kmh than I'm actually doing and 5% less kilometres than I have actually travelled. With my off-road tyres (32" equiv), the speedo is almost spot on at 100kmh and under-reads distance by 9%. So when I calculate fuel usage, I always have to factor in the innacurate readings. While many people believe that the speedo and odo are directly linked, because they get the same effective signal, the way it's translated into numbers does differ.

Cheers

Ray

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Well, I'm happy with my old girl, I've always extracted reasonable eco out of it, the best being 8.8 L/100 on a trip south a few years back (staying at or below 100k for several hundred k) and a 9.7 on a section of my recent Adelaide trip (fully loaded) and since fitting up the lift pump I have done 7200k at an average of 10.58L/100, I'm pretty chuffed with that, considering I have been experimenting with 18psi boost during this time.

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So running 285s does this mean im getting better than 15.8 lph, maybe 14.8 with this 6% thing?

Don't take the 6% as an across the board percentage for all vehicles with 285's, these bloody things are all different, the only way you can tell really is to compare against something solid like the 5k speedo check posts you used to see on some highways or against a GPS, if you don't have one, borrow one, it really is the only way to be sure, even when fitting my ECUTalk I had to calibrate it to the GPS.

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