Fuel observation.

[Shacks]

On a recent trip from Newcastle to Melbourne and return I made a somewhat interesting observation in relation to different companies fuel. On the way south I used Shell diesel. I noticed the average fuel useage on the display was always around the 10.9 l/100km. On the return trip I used Caltex truck diesel and BP diesel. Average fuel useage was showing as between 8.9 and 9.2 l/100km. Conditions both ways were much the same, as was the driving style.
Makes me wonder what is in Shell diesel to make my PB use more. I had noticed it was doing much the same around town, but put it doen to the conditions.
Anyone else gad a simular observation ?

[4greg]

Yep I reckon when i use Caltex Vortex I use a couple of litres more than when I fill up with BP Truck Diesel, motor also seems smoother/quieter as well on truck diesel, cheers Greg

[coughy]

bp has the highest level of createn i think it is called
makes my pb run alot quieter and more power and seems better on the fuel usage

edit it is this from wiki

The principal measure of diesel fuel quality is its cetane number. A cetane number is a measure of the delay of ignition of a diesel fuel.[22] A higher cetane number indicates that the fuel ignites more readily when sprayed into hot compressed air.[22] European (EN 590 standard) road diesel has a minimum cetane number of 51. Fuels with higher cetane numbers, normally "premium" diesel fuels with additional cleaning agents and some synthetic content, are available in some markets.

bp levels are 51 I believe I can't find it at moment but have a read of this good article

http://www.autospeed.com/cms/article.html?&title=Diesel-cetane-ratings&A=112999

edit here it is

BP Ultimate Diesel is suitable for use in all diesel vehicles and in independent tests* demonstrated benefits over ordinary diesel with ongoing use. Importantly, the new fuel is guaranteed to deliver above the minimum Australian standard cetane rating. Cetane is to diesel what octane is to unleaded fuel. The minimum Australian cetane rating standard is 46. BP Ultimate Diesel has a guaranteed minimum cetane rating of 50.

[itsamitsi]

Correct, Cetane in BP is about 52 which is higher than others. Vortex premium is not far behind. I also try to use BP only as you get more out of a tank compared to anything else.

[littleriver]

minimum of 50 cetane ...

http://www.bp.com/en_au/australia/media/media-releases/bp-announces-the-launch-of-its-first-premium-diesel-fuel.html

have been told buy the techs at BP they try to run at 52 cetane

http://www.bp.com/content/dam/bp-country/en_au/products-services/fuels/ultimate-fuels/BP_Ultimate_Diesel.pdf

we try to run BP ulimate diesel in our vehicle when ever possible ...
- it's slowly becoming more available around the country

[whitedg]

Yeah, I've found that BP is the better choice between all the big brands - always seem to get more from the tank when running it.

Cheers
whitedg

[Shacks]

Normally I use Mobil diesel from the 7 11 on the Mobil / independant on the way to work. Their fuel seams to give me good returns.

[whynot]

Normally I use Mobil diesel from the 7 11 on the Mobil / independant on the way to work. Their fuel seams to give me good returns.

So did i until i got a bad tank full. Started running with BP and realised what the difference it.
Never went back to 711

Worth running a couple of tanks for a trial.