Differences in diesel
in [Aussie Drivers]
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From: John_H on 22 Jul 2010 21:45 Kev wrote: >Dingo wrote: >> >> I have a diesel vee-hickel now - what's the story with "winter" >> diesel? > > >diesel when it freezes(or near to it) forms wax The freezing point of diesel is around -40� C and isn't related to the wax content. A high wax content causes the fuel to gel at temperatures well above freezing point (it used to be a problem with temperatures as high as 15� C). >they add heating oil to the diesel to stop the waxing, up to 25% in some >cases(in Aust anyway) Do they still do that? Haven't seen (or heard of) problems with gelled diesel since it went to low sulphur (2003?). I'm therefore guessing the allowable wax content was reduced as well the sulphur. It was a perennial issue prior to that, especially for bulk users. I used to test every batch by putting a sample in the fridge and checking the cloud point as it warmed up (since there's a large hystereris involved). It was almost always necessary to change over to winter fuel to avoid problems with blocked filters and injector lines. I stopped testing not long after the introduction of low sulphur diesel, as the cloud point no longer changed significantly between seasons. AFAIK biodiesel can still have problems at winter temperatures. -- John H
From: Kev on 23 Jul 2010 14:19 John_H wrote: > Do they still do that? Yep we were taking winter diesel to Stanthorpe and Texas last winter %15 and sometimes %25, depending on who ordered it take an hour to load the truck as we had to load up the heating oil then make a shandy by putting diesel on top of it weird isn't, doing either of the above at any other time means a terminal ban Kev
From: John_H on 23 Jul 2010 19:02 D Walford wrote: >On 22/07/2010 1:15 PM, Artoi wrote: >> Just wondering if there's any difference b/n diesel offered by different >> companies? I vaguely remembering someone stating that BP's product is >> "better" for diesel engines in small/family cars. Any truth? Any object >> difference? >> -- >Never noticed any difference between diesel brands with my Hilux, small >Euro diesels in cars are supposedly more sensitive to the quality of the >fuel but I doubt the average driver could tell the difference. Since it's almost certainly Bass Straight crude processed at the Altona refinery in your part of the World, there won't be any difference between brands. It's all going to be Exxon Mobil, no matter what it says on the bowser. :) What the observant punter with a vertical exhaust stack may well notice is a difference between refinery batches... for example, white exhaust smoke at startup indicates a low cetane number (with the rest of the system functioning normally). If your exhaust exits at the back only the bystanders are likely to notice any difference. :) -- John H
From: Kev on 24 Jul 2010 11:59 John_H wrote: > D Walford wrote: >> On 22/07/2010 1:15 PM, Artoi wrote: >>> Just wondering if there's any difference b/n diesel offered by different >>> companies? I vaguely remembering someone stating that BP's product is >>> "better" for diesel engines in small/family cars. Any truth? Any object >>> difference? >>> -- >> Never noticed any difference between diesel brands with my Hilux, small >> Euro diesels in cars are supposedly more sensitive to the quality of the >> fuel but I doubt the average driver could tell the difference. > > Since it's almost certainly Bass Straight crude processed at the > Altona refinery in your part of the World, there won't be any > difference between brands. It's all going to be Exxon Mobil, no > matter what it says on the bowser. :) > > What the observant punter with a vertical exhaust stack may well > notice is a difference between refinery batches... for example, white > exhaust smoke at startup indicates a low cetane number (with the rest > of the system functioning normally). > > If your exhaust exits at the back only the bystanders are likely to > notice any difference. :) > Of course if you are anywhere west of Charleville it'll most likely be Eromanga diesel, almost straight out of the ground out there Kev
From: John_H on 24 Jul 2010 18:19
Kev wrote: > >Of course if you are anywhere west of Charleville it'll most likely be >Eromanga diesel, almost straight out of the ground out there Would that be more than 100 k's from the coast? :)) -- John H |