[whosthecoolguy]

I know this question has been asked of the gas owners, just wondering what the 4.2 litre, 6 cylinder diesel owners are getting?

Please account for lifts, tires, added gear etc…

[Sarmajor]

I get about 560km per tank of 75 litres or so.
75l = 19.8US Gallons
560km = 348US Miles

Therefore 17.57 US miles per US Gallon.

75l = 16.5NZ Gallons
560km = 348NZ Miles

Therfore 21.1 NZ miles per NZ Gallon.

There are 4.56l in a NZ Gallon. There are 3.78l in a US Gallon.

Currently in NZ Diesel prices vary between $1.02 and $0.93.5 depending on the location and other factors that only fuel companies can explain.

Cheers

[diesel junkie]

About 20mpg US & 24UK about 650km per 80litres, mixed towing 60/40.

[landcrusher80]

7km/l

[Martin White]

From 19,950 km of GPS corrected distance:

13.59 l / 100 km or 7.36 km / l or 20.79 miles per imperial gallon
Min 5.36 km / litre
Max 8.93 km / litre.

Best conditions: 10 C, long flat highway at approx. 108 km / h.
Min conditions: 100% city driving, heavy snow/ice, some off roading.

[e9999]

interesting...

so basically, in the grand scheme of things, the difference is not that big, eh...?

I guess I won't be putting in this USD10,000 diesel engine for a while then... bummer....

[haffi]

I´m getting numbers from 13 liters/100 km the best upto 25 liters/100km the worst.

25 l. was the first few days or so. While I was playing around in my new cruiser happy days.

13 l. was traveling, on the highway, no wind or rain. Mostly cruising at 90-100 km/hour.

The cruiser is my DD, normally I´m using 16-18 l./100 km.

I´m driving 90´ 35" tires. Intercooed 1-hdt with 417.000 km. and counting....



ps. I like the diesel power, so I´m using it. I dont like driving like a granny.

[lt1fire]

I thought it would be better... looks like its a 4bt swap for me

[diesel junkie]

Wouldnt care if i got the same economy as gas, better is nice though.
Havent owned a gasser in 17years, it grows on you with time

[ElectricDyck]

I´m driving 90´ 35" tires. Intercooed 1-hdt with 417.000 km. and counting....

Intercooled!? I've searched for info regarding power upgrades for the 1hdt and found very little. Got any pics how you routed the pipe + where you came off the manifold? Any links to threads? I was thinkin about gettin a boost gage and uppin the boost a little, but I'd feel better if I had someone elses feed back.

[Red Cedar]

Hello everyone!

This is my first post.
Could someone with a "Stock" 80 Series Diesel
tell me what they are getting for mileage?

Thanks!

[big80]

Details on my engine/truck:- 1995 HZJ80, 155,000km, DTS turbo kit, boost compensator, 3" mandrell exhaust, PWR front mount i/c with 2.5" piping, 315/75/16 BFG Muds, making just over 140hp @ wheels on 11psi. It has ARB front bar, Kaymar rear bar, 5" lift, cargo draws, cargo barrier, dual batteries, heap of electrical gear. It weighs ~ 2700kg empty. It consistently returns consumption figures of 12.5-13L/100km, easily does over 1000km before the fuel light comes on. And i dont drive it lightly.

[Kalawang]

I get 7 kilometers per liter on an open road, 5 or less in the city.


Kalawang

[Martin White]

I would have to agree that for the majority of owners of a 1HDT that the difference between this engine and gas is not huge in terms of fuel consumption. It seems that under ideal conditions a diesel will return significantly better fuel economy (approaching 40%) but it most assuredly is not double. Most 1HDT's seem to return somewhere between 12-14 litres per 100 km under average driving conditions. There is even disagreement on this forum as to whether a standard transmission returns significantly better fuel economy than an auto or not. I've seen some suggest the standard is up to 20% better, while others say the difference is closer to 5%.

[Martin White]

I should add that John at Ateb now has an HDJ81 and is working on his own intercooler which he feels will be superior to the Safari upgrade. He's planning on using stainless steel throughout. The only thing that stopped me is cost. To do this properly you are looking at about 2000 for the intercooler, more for the tranny upgrade, and more yet again for a 3" exhaust which is recommended for this setup. I figured overall, about 7 grand. Which is a lot of coin, and hard to justify even for me.

[shanegtr]

Its not a 1hdt but my 1hz gets around 12.5L/100kms

[83bj60]

I get 12l/100 average. I don't drive very fast, but I'm no slow poke either, no one is waiting behind me, and when I need to get there, I do use that pedal. Under similar conditions I used to get about 11l/100 with the BJ60, but it would be excrutiatingly slow on long inclines. For comparison purposes, I used to guzzle as much as the equivalent of 16-20l/100 with the old FJ40.

All highway, like going on a trip, maintaining speed and going at 100kph, I got 9.6l/100 last week . That was on the same trip I was getting around 9l/100 with the old BJ60. A very small price to pay for the increased comfort, power and, let's admit it, luxury... And that was using old and extra wide 285/75/16 Bridgestone tires, but without a lift. I believe those who have lifts will find their truck is more of an air dam than those who don't have one, and I am planning to get skinny 85% profile tires soon to replace those noisy fuel hogs and fuel economy should go up by a bit as well.

Last winter during the cold spell, doing short trips of 20km or so, I used to guzzle as much as 14l/100. This was on tiny 235/75/15 tires, which made the engine turn over much faster. But the main thing I discovered is that this engine takes a long time to attain operating temperature in very cold weather as there is a lot of coolant to warm up. From -20C, it used to take about 10km to attain full operating temperature. Hence the efficiency loss and the absolute necessity, IMO, to use a powerful engine warmer if you want to improve efficiency, performance and reduce engine noise and wear.

I started a more technical thread on fuel consumption where I suggested a reporting format so that all variables could be taken into account, feel free to look at it and suggest changes:
http://forum.ih8mud.com/diesel-tech-24-volts-systems/154340-hdj81-fuel-consumption-thread.html

Bottom line, you get hooked to the fuel economy of diesel engines, all others things being equal. Breaking the 10l/100 barrier was elating to say the least, and probably the highlight of my short trip to the States. But if you want to drive at 120kph and faster all day, you will pay the price in MUCH higher fuel consumption: the engine will rev much higher (greater pumpimg losses) and of course, since it's not shaped as a sports car, well... You get the picture!

Chris

[hectorladron]

good point.
im getting 550 kms per 80 liters here in beautiful british columbia. i've found that milage gets better on hotter days. since i got the vehicle in sept and it upseted me to see the milage, but as the days get hotter, the milage has been getting better. my 2 cents.

[dweisger]

Driving like my Grandma...95 km/h (I wish the old girl had a real overdrive gear) I got 600km/68l today on mostly Alberta highway. I hate that she turns 2400rpm at 105-110km/h....with all that low end grunt.....its a waste screaming away on the calgary trail......

[maverick_sr71]

1HZ Manual 300,000km 33" Cooper ST's (worst tyres I've ever had, but that's another story).

12.5ltrs/100km on Dino Diesel, 13ltrs/100km on Bio Diesel. The truck can carry 250ltrs and gets about 2000km before I get chicken and fill her up again.

[mot]

1HD-T 5spd with part-timer getting as bad as 7.0kms/ltr to the best of 10.52kms/ltr (9.51ltr/100kms) or about 24.89mpg(US).

That was mostly city driving, being incredibly diligent with the gas pedal.

The last tank with mixed driving I got 9.5kms/ltr (22.47mpg).

I think if I drove like a granny I would be able to get even 26-27mgp. It does make me cringe when I'm "cruising" at 100-120km/hr though. The rpm seems too high for my liking. I would have to remedy that with going with 33"-35" tires maybe.

[HJ61alex]

My 80 need between 10 to 13 liters for 100 km,
average 11,5 liters at 110 - 120 km/hour on the highway.
it's a 24v with 1HD-FT

[Bitehard]

I am about the same as everyone else at approx 8km/l. I bought diesel for the possibilities of one day getting off the grid with some french fry grease. In addition the exceptional lubricants seem to give the engine a longer life then gassers.

[jasonmt]

Do not know and do not care, diesel has enough of a price advantage that even if it got worse mileage than a gas 80 I would still be doing ok:

[83bj60]

Originally Posted by dweisger

Driving like my Grandma...95 km/h (I wish the old girl had a real overdrive gear) I got 600km/68l today on mostly Alberta highway. I hate that she turns 2400rpm at 105-110km/h....with all that low end grunt.....its a waste screaming away on the calgary trail......

Today, back to my short trips of between 15 and 40 kms at a time average, I got 11.3 l/100, driving at that exact same average speed (which would register as 88-90 on my speedometer). So I guess your fuel economy is just about the same as mine...

The question is, what size tire are you running, what air pressure are they inflated at, and what kind of engine oil are you using?

I also find that for 'normal' north american highways speeds of about 110 kph, that the engine runs a tad high as well, that's why I'm definitely going to stay with 32"and taller tires on this truck, as it can give a 7+ % reduction in engine speed at a given true speed. Also, I find that 2,000 RPM is pretty much the optimum engine speed for cruising, but it only gives about 85kph with 30" (OEM size) tires, which is pretty much suited for the most common Japanese speed limit of 80 kph (correct me if I'm wrong).

Now with 32" or 33" tall tires, that same 85 kph is approximately 91-94 kph, much nicer. With 235/75/15 tires, whcih are about 28.5" tall, you'd have to go at about 2,300 RPMs top reach the same actual speed! ( I know that for having run these puny tires last winter)

My truck has no lift and the 32" tall tires fit perfectly. The only thing I don't like is that they are way too wide IMO for economy and they could hit the fender flares under full compression.

I'd LOVE to find 235 that are 33" or even 34" tall, but that would mean 100 aspect format, and to my knowledge only Michelin makes tires in that format and size, and they are mostly trail tires with big lugs. So I'm thinking of getting 255/85R16s or possibly 235/85R16 (sometimes they are quite close in actual diameter)

Bottom line, revving less = better fuel economy, so getting larger diameter tires is a way to reduce fuel consumption. But taller tires are not necessarily better, unless these tires are not too wide and don't flex to much. So, a 285/75 tire would definitely use more fuel than the same tire in 255/85 format, becaue of the smaller patch and less tire mass to flex. Hence tall and skinny truck type tires are better for fuel economy (and are just as robust) than fat mudders.

But I digress. There's been a lot said on tire selection, suffice it to say they can have a very large impact on fuel economy. I believe the best tire size for an HDJ81 used on the road and trails but without heavy wheeling in swamps and on rocks would probably be 800R16s (if you do mostly long distance driving) or the more common 235/85R16 (which is more general purpose).

[83bj60]

Originally Posted by jasonmt

Do not know and do not care, diesel has enough of a price advantage that even if it got worse mileage than a gas 80 I would still be doing ok:

You are very lucky, north of Montreal I paid 102.9 per litre today, while regular gas was 108.9 per litre. The price difference between your place and mine is humongous, and although you produce oil in Alberta, your gas is much more expensive than ours! What's going on? Does your crude produce less gas and more diesel?

Oh and BTW I got my propane bill a couple of days ago, I pay 83 cents a litre before taxes, which comes up to a whopping ... 94.6 cents per litre!!!

Alberta looks more and more tempting as time goes on... That being said, how much do you pay for electricty per KWh, and what is you basic subscription fee?

[83bj60]

Originally Posted by maverick_sr71

The truck can carry 250ltrs and gets about 2000km before I get chicken and fill her up again.

shouldn't you have added "... and leave half my paycheck at the cashier" or something like that?

250 litres!!! How much would that be where you live?

[maverick_sr71]

Diesel at the pumps is currently $1.32/ltr while petrol is $1.42/ltr.

I rarely fill both tanks, prefering to run a full main tank (90ltr) and carry a spare 50-100ltrs in the sub. I fill both for big outback trips where the next fuel stop can be over 1500km away.
It also keeps the cost of filling up down as in the more remote areas of Oz as diesel can be another $0.50 - $0.80/ltr more expensive in the outback.

[jasonmt]

Originally Posted by 83bj60

Alberta looks more and more tempting as time goes on... That being said, how much do you pay for electricty per KWh, and what is you basic subscription fee?

Unless you have a income of 125K+ a year or a large amount of equity to bring with you entry into any real estate market not characterized by the term "the sticks" is going to be difficult to say the least.

[83bj60]

Originally Posted by jasonmt

Unless you have a income of 125K+ a year or a large amount of equity to bring with you entry into any real estate market not characterized by the term "the sticks" is going to be difficult to say the least.

I remember Dan Loubier bought a house somewhere on the Alberta-BC border just a few years ago for very little money, so I presume there still are good deals to be had in the 'sticks' (we call 'em the 'boonies' here, this is where I live, but it's become more and more crowded )