Unleaded Or Super Unleaded?

[yorkie_chris]

I reckon with "normal use" the errors probably average out.

W.B My missus gets a regular 60+mpg out of her Polo and I only ever put regular in it so his gain has got to be minimal for the extra fuel cost.

[Wideboy]

He's a idiot tho

anyone had experience with the 5 start deisels ect, do they even do that anymore?

The octane number of a fuel is measured in a test engine, and is defined by comparison with the mixture of iso-octane and heptane which would have the same anti-knocking capacity as the fuel under test: the percentage, by volume, of iso-octane in that mixture is the octane number of the fuel. For example, gasoline with the same knocking characteristics as a mixture of 90% iso-octane and 10% heptane would have an octane rating of 90.[1] This does not mean that the gasoline contains just iso-octane and heptane in these proportions, but that it has the same detonation resistance properties. Because some fuels are more knock-resistant than iso-octane, the definition has been extended to allow for octane numbers higher than 100. Octane rating does not relate to the energy content of the fuel (see heating value). It is only a measure of the fuel's tendency to burn in a controlled manner, rather than exploding in an uncontrolled manner.

More expensive fuels 'tend' to burn in a more controlled manner, meaning those engines designed to take advantage of it, will see a small benefit. The SV lump isn't one of them...
It will typically have more additives in though, and they can sometimes be helpful for the odd use to clean out the system

[johnnyrod]

I was trying to find a list of UK suppliers' RON and MON ratings the other day but failed. MON is a lower number and more real-world, RON is what they quote on the pumps.

In terms of additives, take someone like Shella nd they'll use a good package even in the "normal" grade of fuel. It takes a few tankfuls for it to make a real difference though, just filling up once won't have a big effect, in general.

Not tried it in the SV.

My diesel Volvo manages to average about 38mpg on V-Power Diesel though, which is slightly better that it's normal 36mpg.

Clearly the 2mpg increase does not justify the cost, I notice no difference in performance.

Im a proud member of the 33hp club with a naked curvy and i do notice a difference going between fuels, i find that 'Total' have a super unleaded that improves my performace considerably in the higher rev ranges....
Chris.B

Ive thought that the BP Ultimate gives a very (very) slight increase in power, and that BP fuel in general seems to make my bike run slightly smoother. Then again this might be completly in my mind.

What? None of you run your bikes on milk?

That might be why I'm having trouble starting....


(I use Shell V-Power, I'm pretty sure it's made it less prone to fail in the cold. Still haven't decided if I will carry on using it when it warms up)

[ophic]

Originally Posted by stratman_001

I...i find that 'Total' have a super unleaded that improves my performace considerably in the higher rev ranges....

and how about your bike?