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dronus Profile
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X-TRAIL LEGEND
 


Date Registered: 08-2008
Location: Adelaide
TOTAL POSTS: 541
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Diesel Grades


Howdy all,

I've been taking a keen interest in the types of diesel that the Servo's here in Adelaide have on offer, and thought i'd share my findings, and encourage feedback on the different types.

It would seem that different Service stations have different types of diesel from time to time.
The obvious difference is the sulfur content, the not so obvious is the wax content (it varies seasonally).

Shell only has one type of Diesel called "low sulfur". It has 50ppm Sulfur.

BP has quite a few types of Diesel:
Low Sulfur Diesel which has 10ppm sulfur
BP "normal" Diesel which has 50ppm sulfur
BP "Winter" diesel which has an adjusted wax content in winter
BP "Ultimate" Diesel which has a higher cetane rating, added detergents and anti-foaming agents.

Mobil has "Synergy" but no info on its sulfur as yet, and i haven't used it yet.

Caltex has an interesting range:

"Standard Diesel" 1300ppm sulfur, cetane rating of 50
"Low Sulfur" has 500ppm Sulfur, cetane rating of 46
"Ultra low Sulfur" has 50ppm Sulfur, cetane rating of 46
"New generation Diesel" which has 2% Biodiesel
"Vortex Premium Diesel" Which seems to have some anti-foam and detergents added.

SAFF (Enffue).

Biodiesel which has a cetane rating of 50+ and good for the dolphins.
Premium Biodiesel which is ultra low sulpur diesel (10ppm) with 20% biodiesel added

United don't seem to have diesel (that i could see here in Adelaide anyway)

I mainly use BP Diesel and the same servo seems to change between G10 and G50 every couple of weeks.

The following is an explaination taken from the BP site about Sulpur which i found interesting.

# What are the environmental advantages of lowering the sulphur content in Diesel fuel?

Sulphur content in fuel is linked to the emissions of pollutants from your engine into the atmosphere including carbon monoxides, unburnt hydrocarbons, nitrogen oxides and carbon dioxide and black sooty smoke emissions. BP Ultra Low Sulphur Diesel has a low sulphur content of 10 parts per million (ppm) which when compared to an equivalent 50ppm diesel fuel has 80% less sulphur which can deliver:
9% less carbon monoxide
7% less unburnt hydrocarbons
1.5% less nitrogen oxides and
.4% less carbon dioxides and
Up to 6% less sooty exhaust fumes into the atmosphere.

Technical Issues and performance
How does using BP Ultra Low Sulphur Diesel (10ppm) affect my engine?

BP Ultra Low Sulphur Diesel (10ppm) has a low sulphur content that can result in decreased wear and tear on your vehicle’s pistons and cylinders, which can extend the lubricant life of your engine and can potentially reduce maintenance costs over time compared to an equivalent 50ppm Diesel fuel.

Will there be any effect on engine components?
Fuel consumption:Testing shows that you will not compromise your fuel economy when using BP Ultra Low Sulphur Diesel (10ppm) when compared with an equivalent 50ppm Diesel fuel. LubricityIn the process of decreasing sulphur from diesel, the levels of natural lubricants are also reduced. BP Ultra Low Sulphur Diesel (10ppm) lubricity is controlled by the addition of a lubricity additive, and the impact on the injector and fuel system will be unchanged. The lubricity of diesel will be constantly monitored by laboratory tests to ensure that each batch of BP Ultra Low Sulphur Diesel (10ppm) meets Euro standards specification.

Can BP Ultra Low Sulphur Diesel (10ppm) be mixed with other Diesel grades?
BP Ultra Low Sulphur Diesel (10ppm) can be mixed with other Diesel fuel grades in tanks or when refuelling with no effects on power or fuel economy.

Is this suitable for all diesel engines?
Yes. BP Ultra Low Sulphur Diesel (10ppm) is suitable for all diesel engines including high speed industrial engines and high performance diesel vehicles.

Food for thought.


Last edited by dronus, 10/Dec/2008, 8:24 am


---
Current - GU Patrol
Old - '08 T31 Platinum TL Diesel Manual - Bells and whistles.
Older - '04 T30 Ti-L Auto
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Date Registered: 02-2008
Location: Brisbane, Qld
TOTAL POSTS: 973
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Re: Diesel Grades


Wow dronus!

Great report findings. I have forwarded your post to my father - he is looking at buying my mother the Peugot 308 (yes, I have tried to convince them both to get the diesel exy emoticon ) and your information should assist his purchasing decision.

Great write-up emoticon

---
Stephen
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Electric Blue 2008 Ti CVT

10/Dec/2008, 10:09 am Link to this post Send Email PM   Send Private Message
 
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Date Registered: 07-2008
Location: Victoria Park, WA, AU
TOTAL POSTS: 92
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Re: Diesel Grades


Awesome report Dronusemoticon

What is the best one to use for Fuel Economy/Power? As much as I love the environment, engine wear/ fuel economy and power is the most important to me.

I use BP Ultimate Diesel in mine, but don't notice any better fuel economy, although it 'may' give slightly more power..... probably not worth the extra price, but the BP station is the closed to me, and they only have ultimate diesel, none of the others....

Cheers,

Chris.


---
Chris (X-918)
2008 TL Manual Precision Grey
Nudge Bar, Roof Bars, Tow Bar, Parking Sensors, Cargo Tray, Rubber Mats, Tint, Paint Protection, Rust Protection, Leather Protection, and a scratch from some w**ker in the IKEA car park..
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11/Dec/2008, 12:46 pm Link to this post Send Email PM   Send Private Message
 
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Date Registered: 08-2008
Location: Adelaide
TOTAL POSTS: 541
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Re: Diesel Grades


Howdy Chris,

I found the best to be the G50 diesel from BP, although i think its a psychological thing when you know you are running G10 as they have the same cetane rating. They seem much of a much. We don't have the BP Ultimate here in SA yet so you are lucky!

I ran half a tank of standard Caltex diesel when i was empty, it was horrible. I'm not sure if it was definitely related but you could notice the "sweet" smell from the exhaust with that fuel. My friend has a new SR5 which also used to make that smell, until i suggested he change to BP and now its gone.

I haven't personally tried the bio-diesel or blended fuels in this car as Nissan told me it would void my warranty if something went wrong. Not sure if that would hold up in court or not but im not taking that risk at the moment!

My friend used the Enffue bio-diesel in his Toyota landcruiser and he said it went fine, and it actually quietened the rattle down quite a bit, and was cheaper.

I tried the Mobil Diesel and it didnt seem to make much difference performance wise to the caltex, but it smelt more then the BP when refuelling which put me off a bit. One guy here at work carries a box of latex gloves and puts one on when he refuells - he also wears pink shirts so i'm not sure which way to take that!

I spoke with the owner of the BP where i fill up (its the cheapest, and on my way home) and he told me all about how they get different types of fuel and how diesel is becoming more popular so they put in extra pumps, as well as "high flow pumps". He also mentioned that BP is shifting to G10 where they can.

The BP Ultimate would be the pick of the bunch, and you are lucky enough to have access to it! the anti-foaming and detergents would keep your engine nice and clean.

So to answer your question - i dont know! I think its subjective and can be muddled by driving habits when you think you have a better or worse fuel. I dont have any hard data on fuel usage as yet, but I've filled up with G10 last monday so ill post back in the Diesel Fuel Economy thread after doing a few tanks.

Cheers,


---
Current - GU Patrol
Old - '08 T31 Platinum TL Diesel Manual - Bells and whistles.
Older - '04 T30 Ti-L Auto
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11/Dec/2008, 1:07 pm Link to this post Send Email PM   Send Private Message MSN
 
dronus Profile
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Date Registered: 08-2008
Location: Adelaide
TOTAL POSTS: 541
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Re: Diesel Grades


Re: Chris's question about power/economy:

I ran my tank down and filled up with Shell Diesel.

Amazingly - doing the same drive to work and back, same driving pattens, my fuel usage is sitting on 8.6l/100km after a week and a bit.

My tested and proven fuel economy when using BP Diesel is no more than 7.4L/100, and quite often closer to 7. All runs have nothing different, same boring drive to work.

I have also noticed a lack of power with this tank of Shell compared to the BP. Ill keep running it down and see what the end confirmed L/km is.

---
Current - GU Patrol
Old - '08 T31 Platinum TL Diesel Manual - Bells and whistles.
Older - '04 T30 Ti-L Auto
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Date Registered: 01-2007
Location: Melbourne, Wantirna
TOTAL POSTS: 435
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Re: Diesel Grades


This may not be fully correct but have heard the current diesel sulphur content is set at 50 ppm as per Euro 4 specifications. I believe in the future this will be reduced to 10 ppm when the next set of standards are due to be implemented. I know others who run BP diesel in their vehicles and are happy with its performance.

  emoticon

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Xcited Touring


Series 2 2005 ST Auto, nudge bar, driving lights, spoiler, GME 3100 UHF, towbar , bashplate, Yokohama Geolander AT-S and Kings Springs lift X495 (c)
23/Dec/2008, 9:10 pm Link to this post Send Email PM   Send Private Message Blog
 
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Date Registered: 10-2006
Location: Adelaide
TOTAL POSTS: 107
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Re: Diesel Grades


Interesting reading as I don't have a diesel X-trail. Especially the Shell part.

I have had trouble with their petrol and have just been informed to stay clear of their LPG too.

It also reminds me of an article by Hot 4's and Rotaries that tested Shell Helix mineral oil as the baseline against full synthetics. The shell mineral and synthetics were the worst oils in the test. The mineral lost about 40% of it's viscosity in the engine after the 20 min test on the dyno. Check the web the test should be on there somewhere.

Surprisingly Mobil and AMSOIL came out on top, but the pick of the bunch cost/quality was the BP Visco 5000. I used this in the past with good results.

I don't work for or connected with BP I just like their products and the more I look around the more it is confirmed. Also Shell doesn't look so good.

Sorry about the long winded reply and hijacking the thread.




Last edited by FJRKYM, 5/Jan/2009, 7:06 pm
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dronus Profile
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Date Registered: 08-2008
Location: Adelaide
TOTAL POSTS: 541
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Re: Diesel Grades


Out of curiousity i filled up with MOBIL diesel tonight.

The servo has alot of trucks use it so im hoping it will be safe. Will post back observations in a few days.

-dronus

---
Current - GU Patrol
Old - '08 T31 Platinum TL Diesel Manual - Bells and whistles.
Older - '04 T30 Ti-L Auto
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Date Registered: 08-2008
Location: Adelaide
TOTAL POSTS: 541
Reply | QUOTE
Re: Diesel Grades


Filled back up with BP G50 again. With the MOBIL i noticed that it didnt have the same diesel smell as the BP, or it could have just been my nose. MOBIL is generally cheaper down south than BP for some reason.

Fuel economy seemed a tad worse and the engine sounded noisier. This may have been circumstantial due to the hot weather we have been having over here, and i was on holidays so my driving might have been different though so it might not be an apples vs apples case. No real significant difference in power, although towards the end of the tank it seemed less responsive.

I wonder if the temperature of diesel affects its cetane rating? When the ambient temperature is higher the engine ever so slightly performs differently. Its still a very powerful engine and its not a show stopper, just an observation. I'm not a chemist but im curious now.. might have to do some reading..

---
Current - GU Patrol
Old - '08 T31 Platinum TL Diesel Manual - Bells and whistles.
Older - '04 T30 Ti-L Auto
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Date Registered: 06-2008
Location: New South Wales
TOTAL POSTS: 182
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Re: Diesel Grades


My simplistic understanding of the effect of ambient temperature is this: the hotter a given amount of air is the less dense it becomes and thus contains less oxygen for a given volume - I'm talking atmospheric air not the air being compressed and heated in the cylinder - since there is less oxygen present combustion is not quite as efficient.

This is part of the reason an intercooler is fitted. The air from the turbo is quite hot due to the heat in the turbo housing from the exhaust gas so the compressed charge of air passes through the intercooler - basically an air to air heat exchanger -to cool the incoming charge and make it more dense ie containing more oxygen. The combination of the cooled incoming air and the fact that it is above atmospheric pressure causing it to have a scavenging effect all aid better combustion.

Bottom line is your engine will make more power on a cold day than a hot day.


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Glenn X-889
2008 ST Manual
28/Jan/2009, 7:14 am Link to this post Send Email PM   Send Private Message ICQ AIM
 


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