Re: E10 fuel
Posted: Sat Aug 21, 2021 8:25 pm
Until recently (maybe still, i've not checked) in all but a couple of UK counties 98 RON Super unleaded, although advertised as E5, is in fact E0. The exceptions being Cornwall and Northumberland IIRC.
Presumably this will slowly change as E10 comes on line (AFTER Sept 1st, as Alun correctly noted) I'm not too worried about it becoming E5, my cars cope with 95 RON E5 fine, i'm much more concerned with the 97/98 RON octane rating disappearing.
I remember what happened to 5 Star (101 Octane) petrol back in the early 70s. It was supposed to be available at least another 5 years, instead it disappeared in months!
The effect THAT will have on "our" cars which were all designed to run on at least a 98 RON 4 Star is what worries me, sure you can back the timing off a bit more, but it's courting other problems with pre ignition and pinking. The Sprint was probably concieved to run on 5 star and had to be detuned a bit, as 5 star had gone by it's delayed launch in 73. Which must have annoyed a few folk no end.
"Normal" E5, as sold today everywhere, is 95 RON and they've promised (HA HA!) that this will continue to be sold (the inference is as super, at an appropriate markup). So does this mean that the "real" super at 98 RON will go in favour of what is really Supermarket E5, branded as Super and priced accordingly? Or, fatuous optimism, will there be 2 grades of "super" according to car requirements?
Just asking!
Steve
Presumably this will slowly change as E10 comes on line (AFTER Sept 1st, as Alun correctly noted) I'm not too worried about it becoming E5, my cars cope with 95 RON E5 fine, i'm much more concerned with the 97/98 RON octane rating disappearing.
I remember what happened to 5 Star (101 Octane) petrol back in the early 70s. It was supposed to be available at least another 5 years, instead it disappeared in months!
The effect THAT will have on "our" cars which were all designed to run on at least a 98 RON 4 Star is what worries me, sure you can back the timing off a bit more, but it's courting other problems with pre ignition and pinking. The Sprint was probably concieved to run on 5 star and had to be detuned a bit, as 5 star had gone by it's delayed launch in 73. Which must have annoyed a few folk no end.
"Normal" E5, as sold today everywhere, is 95 RON and they've promised (HA HA!) that this will continue to be sold (the inference is as super, at an appropriate markup). So does this mean that the "real" super at 98 RON will go in favour of what is really Supermarket E5, branded as Super and priced accordingly? Or, fatuous optimism, will there be 2 grades of "super" according to car requirements?
Just asking!
Steve
Ethanol has a much higher latent heat capacity than petrol, so cold-starting in cold weather might be more difficult and there might be a greater tendency for carburettor & inlet-manifold icing.