Colin Shepherd wrote:
>> I've never felt motivated to spend the significant extra cost of
>> Ultimate diesel to find out whether it's better or not. On the odd
>> occasion I've used Ultimate ('cos we'd run out of the normal stuff
>> thanks to the big boys sucking the tank dry overnight) I can't say
>> as I've noticed any difference but most of my motoring is short hops.
>
> As an advocate for Ultimate it probably takes several tankfulls to
> clean the system out. As I said before it costs 5% more but on long
> runs I get 10% better fuel Consumption. My daughter who has my old
> Mk1 Zafira and only does short school runs gets to the point where
> its lumpy starting. I buy her a tankfull of Ultimate and it improves
> quite quickly. I've a friend who caravans and he always fills up with
> Ultimate when he caravans, reckons he can feel the difference. Hate
> to sound like a BP advert but reckon its worth the money. Apparently
> it also has a higher Cetane number (cue Ron) which means you get more
> bang for the money.I know nuthin.... IIRC Cetane for diesel is a bit like octane for petrol. It's typical that they have to use a very old out of date trivial name (I've never heard anyone use it, except in relation to diesel) - almost as bad as the petrol one. 100 Octane refers to 100% of iso-octane, (a very bad trivial name - iso usually means one methyl not three) who's real name is 2,2,4-Trimethylpentane. Cetane's real name is Hexadecane Ron Jones Process Safety & Development Specialist Don't repeat history, unreported chemical lab/plant near misses at http://www.crhf.org.uk Only two things are certain: The universe and human stupidity; and I'm not certain about the universe. ~ Albert Einstein
