United Fuels 100 octane

[red_hotxr6]

Originally Posted by cobramania

Something I've noticed among the number of Ethanol blended fuel threads is, many people seem to be confused with the Octane rating of the fuels, thinking a higher RON or octane, means it's a higher performance fuel, when in fact that is not the case.

The octane rating is only to do with the point at which the fuel ignites, a higher octane fuel can handle higher compression & higher temperatures before it ignites. High performance engines are usually high compression & therefore have to use fuels with a higher octane rating & I think that's where the confusion is coming in.

United 100 is not a higher performance fuel than United 98. The laws of physics state you can't get more energy out than what you put in.
A tank of United 100 will have less energy contained in it, therefore giving you less performance power, than a tank of United 98, because 10% of it is Ethanol which contains less energy than if it was 100% Unleaded petrol.
Using other substances to increase the fuel density (or energy content) usually also increase the RON, above the base fuel of 91 or 95 RON (such as BP Ultimate).
It's actually the higher compression & temperature values, in a high performance engine that give you the extra performance, not the Ethanol increased octane rating.
Using a e10 100 RON fuel in a non turbo, supercharged or high compression engine, is going to give you less power & performance than if you just used 98 RON fuel. Same with e10 Unleaded over regular unleaded fuels. Using a 95 or 98 RON non Ethanol blend fuel in a car designed/tuned to run 91 RON, will give you increased power & distance (fuel efficiency/economy) due to the higher density or energy content it contains.

I was going to ask you a question, but being so comprehensive in your detailed answer, you gave it to me in your last sentence...well done sir...lol

[Killaxb]

Theres 2 types of united fuel.. Theres e10 the green rubbish an theres a new purple 100 octaine. The 100 octaine seems to be pretty good