BP Ultimate 102 unleaded

[Martin Keene]

But if your going to spend that much on fuel, a pukka race fuel, like Sunoco GT Plus 109, is only 42p a litre more from Fluke.

Or put another way:

BP Ultimate 102 costs £0.278 / octane point more than Optimax.

Sunoco GT Plus 109 costs £0.151 / octane point more than optimax.

Assumes Optimax at £1.03/litre, BP Ultimate 102 at £2.42/litre and Sunoco GT Plus at £2.84/litre.

Martin i think you need a new calculator , sunco GT+ is 3.33 a litre if you ad vat , then you have to add delivery to that , so your way out .

Apologies. I couldn't see if it included VAT or not, and guessed. Incorrectly as it turned out...

And just forgot about postage...

[Yobbo]

I suspect the current price it deliberately higher than it needs to be as its a trial and so supply is probably restricted. It may be hand blended and if demand is sufficient then a mass produced version would be significantly cheaper

[juansolo]

I suspect the current price it deliberately higher than it needs to be as its a trial and so supply is probably restricted. It may be hand blended and if demand is sufficient then a mass produced version would be significantly cheaper

For that sort of money it can be hand blended by naked nubile virgins for all I care, it still wouldn't make it into either of my cars.  It hurts enough at £1.03 for optimax filling the scoob to watch the price go up faster than the litres.  /northerner

[windy]

So then, has anyone tried E85 fuel sold at Morrisons? Aren't they mainly based up-Tt-North?

[Guest]

I suspect the current price it deliberately higher than it needs to be as its a trial and so supply is probably restricted. It may be hand blended and if demand is sufficient then a mass produced version would be significantly cheaper

doubt it , its in line with all the other supliers of race fuel .

[StrikerBob]

Unless you're all going to remap your ignition it's all totally academic....

The only benefit of a higher octane fuel is more resistance to knock at higher compression ratios and/or more advanced ignition timing (as has been discussed on here a few times IIRC).  The only production cars on the road that could possibly make use of the higher octane rating are those that have knock control systems in the ECU that continuously adjust ignition timing to maximise torque whilst "listening" for knock. Even these will struggle to see any improvement, as they're all calibrated for the normal pump fuel range, i.e. max 98 ron.  I doubt very much that any Westys will be running KCS....  although I stand to be corrected

As for all that stuff about  "The exceptionally good evaporation properties", well that's just tosh!

Sorry to be a party pooper, but IMHO it's just another scam to wring more cash out of us at the pumps....      

Don't most modern cars have ECUs that "learn" how far they can advance the ignition via a knock sensor, thereby getting the most out of better fuels? I.E. closed loop?

I'd suggest it's more common for cars to have a knock sensor than not these days?

Turbo cars will undoubtedly benefit most from this.

[Dave Eastwood (Gadgetman)]

I was under the impression that the knock sensor setup on the average car merely applied a compensation map to the standard ignition, (and in some cases fuel map). If knock is detected, they'll back the ignitons settings off to "safer" settings, (and some of the more advanced will apply extra fuel to cool the cylinder).

AFAIK what they won't do, is advance the ignition untill knock is detected, and hold it just on the "safe" side.

So to take advantage of the "super" fuels, you'd need your maps optimised for that fuel/octane rating, and then rely on the knock sensor etc. to save the engine on lower octane fuels.

To be honest though, from what I read about the issues of knock sensors sepparating out genuine knock from background engine noise, I don't know how aggressive you could be with your settings.

[Kevin Wood]

The onset of knock isn't necessarily the best ignition setting for best power (increasingly so these days with efficient combustion chambers - compare maximum advance on a Zetec map to one from a Xflow).

Knock sensors are probably more about allowing manufacturers to use higher compression ratios for better fuel efficiency under light load and to take measures to allow the engine to stay together if you put a tank of bad fuel in it.

Putting in higher octane fuel than the engine is designed for probably won't make much difference without other engine mods.

At £2.42 a litre for a few horsepower I'd change to an engine that drinks 2.42 times as much fuel and then see how many horsepower I'd gained!

Kevin

[michaelcoombs]

So then, has anyone tried E85 fuel sold at Morrisons? Aren't they mainly based up-Tt-North?

I'm working on a conversion as we speak  

[detailer]

Forget spending silly money on high octance fuel.  Just bang a few bottles of Millers Octane booster on the back of some Optimax

[Guest]

thats actually totally pointless , there is a lot more to these fuels than just the octane rating , oxygen content and burn rates ,lot more than chucking in a few bottles of millers.......... having actually used 102 in something where you can feel the difference then its way better than adding an additive.

[windy]

So then, has anyone tried E85 fuel sold at Morrisons? Aren't they mainly based up-Tt-North?

I'm working on a conversion as we speak  

So a set of valves & fuel lines that don't rot. Anything else?

One thing going for this fuel is that you car smells like a distillery, a modern alternative to that Castrol R smell. Luvverly  

[itguy]

QUOTE

I doubt very much that any Westys will be running KCS

yes there are - mine for starters on MS and my Zetec.

Its not quite perfected yet (still need to sort out the mapping etc) but it will advance until I tell it to stop in the map and retard as soon as it hears a knock - closed loop

[detailer]

thats actually totally pointless , there is a lot more to these fuels than just the octane rating , oxygen content and burn rates ,lot more than chucking in a few bottles of millers.......... having actually used 102 in something where you can feel the difference then its way better than adding an additive.

I can feel significant difference putting millers in.  In saying that I have read that BP 102 can give up to an extra 60 bhp on turbo motors (if you get it re-mapped).

Can't see the millers giving 60 brake