Diesel Quality

[zaxxon]

After all the talk recently in regards to milage i started to pay attention to mine. I used to get around 600k to 670k a tank, always filling up at Shell using "ultra diesel" not knowing what I was payin the extra 3c a litre. I use a conditioner every tank and am obsesive when it comes to clean air filters and oil changes. My last tank after hearing Wayne say one of his customers is getting 800ks a tank mind you, no turbo, i wanted to see what the most I could get from a tank is. I drove in the most conservative manor possible. Rollon starts no down shifting to lights, short shifting speed limit the works. I also need to mention I started filling up at Hughes due to the discount I get through work. Well to my suprise i got 550k to my last 2 tanks. The same two tanks I bought from Hughes. What the hell is up? I did some reading and from what I can tell "ultra diesel" is ultra low sulphr. I was once told that older diesel engines depended on the sulphr for some lubrication, is that true? Has anyone else found such differing milage from diferent fuel Stations?

 

[crushers]

direct injection engines usually get a bit poorer fuel milage...

that does seem quite low but you have to take into consideration colder temps (thicker lubricants), idle time (0 mpg), stop and go traffic...

800k/tank would be steady highway driving, not around town milage...

 

[zaxxon]

direct injection engines usually get a bit poorer fuel milage...

that does seem quite low but you have to take into consideration colder temps (thicker lubricants), idle time (0 mpg), stop and go traffic...

800k/tank would be steady highway driving, not around town milage...

I don't get out on the highway much except to the lake in the summer and from what I remember my milage was worse than I get in the city, I assumed it was just gearing even thought I have not removed my 105km siren which keeps me crawlin along. I took Brownbears advice when it comes to warming up, a minute or so till you hear it running smoothly and then light on the pedal for the first bit, and my rad hose heater is always plugged in, I run the plug in on a stat and timer combo, works great.

 

[crushers]

you could be right, a poorer grade of diesel?? not sure how that works...

 

[David*BJ70]

I get 800Km (max !) on highway only and ±650km all around driving

3B no turbo...

 

[Jan-78FJ40]

fuel quality can make a huge difference.
The worst diesel I ever got was in a little town in Mexico. The HJ60 went from the usual 24mpg to 10. I have no idea what happened, it did not smoke or run hot, and I know the tank was full. but I barely made it the 300km to the next fuel station. filled up, and everything was fine.
on the other hand, just last week I filled up in oregon, at a station that has just got a fresh delivery of winter diesel, and I got 30 mpg without changing driving habits.
The mexico thing was really puzzling.

j

 

[Garry]

After all the talk recently in regards to milage i started to pay attention to mine. I used to get around 600k to 670k a tank, always filling up at Shell using "ultra diesel" not knowing what I was payin the extra 3c a litre. I use a conditioner every tank and am obsesive when it comes to clean air filters and oil changes. My last tank after hearing Wayne say one of his customers is getting 800ks a tank mind you, no turbo, i wanted to see what the most I could get from a tank is. I drove in the most conservative manor possible. Rollon starts no down shifting to lights, short shifting speed limit the works. I also need to mention I started filling up at Hughes due to the discount I get through work. Well to my suprise i got 550k to my last 2 tanks. The same two tanks I bought from Hughes. What the hell is up? I did some reading and from what I can tell "ultra diesel" is ultra low sulphr. I was once told that older diesel engines depended on the sulphr for some lubrication, is that true? Has anyone else found such differing milage from diferent fuel Stations?

I,ve had the exact same experience since they stripped all the sulphur from our fuel in NZ! Went from around 600-650km p/tank to barely 550km p/tank.

 

[roscoFJ73]

How is everyone arriving at these figures,do you fill the tank up ,reset the trip meter and when its nearly empty refill and do the maths?


Im getting 604 klms for about 79.5 litres which is 13.1 litres per 100 klms.
This is about the median between my lowest and highest fuel consumption.

Im always sceptical when people post up fuel econmy figures that are %20 better than everyone else with the same motor

 

[roscoFJ73]

fuel quality can make a huge difference.
The worst diesel I ever got was in a little town in Mexico. The HJ60 went from the usual 24mpg to 10. I have no idea what happened, it did not smoke or run hot, and I know the tank was full. but I barely made it the 300km to the next fuel station. filled up, and everything was fine.
on the other hand, just last week I filled up in oregon, at a station that has just got a fresh delivery of winter diesel, and I got 30 mpg without changing driving habits.
The mexico thing was really puzzling.

j

Probably sold you a tank of heating fuel oil

 

[Jan-78FJ40]

Probably sold you a tank of heating fuel oil

yep, must be something like this. or mixed with old cooking oil. or fish-oil

 

[Lantec]

How is everyone arriving at these figures,do you fill the tank up ,reset the trip meter and when its nearly empty refill and do the maths?


Im getting 604 klms for about 79.5 litres which is 13.1 litres per 100 klms.
This is about the median between my lowest and highest fuel consumption.

Im always sceptical when people post up fuel econmy figures that are %20 better than everyone else with the same motor

Yeah, basically, I reset the trip every time I fill up and I write down on the recipe what I've travelled.

Then I go on this site (really helpful, calculates everything for you except for tire size differences, you have to do that yourself)

http://oee.nrcan.gc.ca/transportation/tools/fuel-trip-calculator/fuel-calculator-input.cfm?attr=16

It'll break it down to US MPG, UK MPG and L/100km. And how much for each km or mile or UK mile

Great stuff

 

[roscoFJ73]

Fuel fill-up volume and odometer reading are entered into a simple spreadsheet that corrects for the 235x85R16 tires, and computes litres/100km and MPG for every fill-up.

My BJ74 gets 9.3 L/100km [25 usMPG] summer highway driving to 13 L/100km [18 usMPG] -20°C winter 4x4 mixed city-highway driving. It provides a continuous record since I got the truck.

Its interesting some engines vary a fair bit. The 1HZs from my observations seem not to vary much between highway and town

Yeah, basically, I reset the trip every time I fill up and I write down on the recipe what I've travelled.

Then I go on this site (really helpful, calculates everything for you except for tire size differences, you have to do that yourself)

http://oee.nrcan.gc.ca/transportation/tools/fuel-trip-calculator/fuel-calculator-input.cfm?attr=16

It'll break it down to US MPG, UK MPG and L/100km. And how much for each km or mile or UK mile

Great stuff

So after all that what did you get

Im not convinced sulpher free fuel can cause such huge differences in fuel economy.If it affected owners of 120 tonne roadtrains who already use 100litres per 100klms by %10-20 they would all be broke within months.
It would also have a big affect on fishing fleets and places like Europe where %60 of all cars are diesel.
It would cause serious political strife.

 

[Lantec]

So after all that what did you get

Im not convinced sulpher free fuel can cause such huge differences in fuel economy.If it affected owners of 120 tonne roadtrains who already use 100litres per 100klms by %10-20 they would all be broke within months.
It would also have a big affect on fishing fleets and places like Europe where %60 of all cars are diesel.
It would cause serious political strife.

Well, I travelled 583.6km on a tank of 61.460L of diesel being $62.63

So I got 22.33 US MPG with mixed city and highway.

I guess I should have also noted that I poured in 4L of Canola oil too which should put it at 65.460L which would end up being 20.91 US MPG but not sure if Canola oil would have the same power output as diesel and count as such

 

[podiev]

a little bit of side-track here. But what is the fuel capacity in liters of a single-tank HDJ81? I would like to start measuring my mileage and compare with what you guys are getting.

 

[83bj60]

a little bit of side-track here. But what is the fuel capacity in liters of a single-tank HDJ81? I would like to start measuring my mileage and compare with what you guys are getting.

Been told it was 95l, but I saw 93l somewhere else.

 

[Ron R]

a little bit of side-track here. But what is the fuel capacity in liters of a single-tank HDJ81? I would like to start measuring my mileage and compare with what you guys are getting.

If you just want to meter your milage there's no need to know the capacity of your tank.
Fill it up to a point (diesel visible in fillerneck?) where you can see the level.
Note the odometer (A).
Drive.
Fill up again to same point, note amount.
Note odometer again (B).
Subtract: B-A= ????
Now you know the amount of fuel used and the miles you drove with that amount of fuel - - > hence you can find the milage.

Regards,

 

[Martin White]

You can remove another variable by fueling up at the same pump several times. You absolutely have to use GPS (or a measured distance) to determine your ODO correction as well.

 

[Ron R]

You can remove another variable by fueling up at the same pump several times. You absolutely have to use GPS (or a measured distance) to determine your ODO correction as well.

Can agree on that. Although ODO calibration being more important than refuelling at the same station.
The fuelpump should be calibrated (law!) so differences between different stations should be small and hardly noticable.

What might make a big difference is the temp of the fuel you get from the pump.
Warm (hot) fuel is less dense than (ice-)cold fuel. And because the energie in it is related to the weight, light (=warm) fuel delivers less energie and less miles to the gallon than heavy (=cold) fuel.

Therefore, fuel should be traded by weight, rather than volume.

Cheers,

 

[HZJ60 Guy]

I would use an additive like Stanadyne, or Amsoil. I use an injector cleaner/all around additive, and a cetane booster every tank.

 

[canucksafari]

The cetane boost will help. I have read on both gov and fuel injection pages that the new ULSD produces somewhere around 1%less energy than LSD. I presume there may be some variability depending on the source of the crude oil as to its cetane output to begin with. Also winter diesel has a lower cetane rating as well. Combine the two and you get worse fuel milage. If you use the Standyne lubricant with cetane boost then you have taken care of two of the ULSD issues. The loss of the aromatics can only be taken care of by putting in new Viton type seals. However, that doesn't affect your economy - unless your IP is p*ssing diesel all over the road.