Esso Super Unleaded change.
Discussion
W88CHY said:
Just a heads up, from August Esso are changing their Super Unleaded from 97 octane to 99 octane, this will take a month or so for the 97 to be replenished in the tanks with the 99 hence they are not launching the new product officially until around October.
I guess good news as it means more 99 available. With Shell and Tesco already offering 99 I am very surprised any premium fuel is anything less.
Then again I tend to only use Tesco 99 as it's cheap and easy to find.
In Europe you cam get 102 from the pumps.
Um.... any car???
And especially if tuned for it that is an extra 20 hp not to mention increased knock resistance at higher inlet temperatures and boost pressures. My best economy was on 102 coming back from the ring I averaged over 375 miles around 34mpg at a high average speed (cruise control set at 90)
Point is 99 should be the minimum standard for "super unleaded" as such 97 being sold at Esso currently / sainsburys and bp is a joke
And especially if tuned for it that is an extra 20 hp not to mention increased knock resistance at higher inlet temperatures and boost pressures. My best economy was on 102 coming back from the ring I averaged over 375 miles around 34mpg at a high average speed (cruise control set at 90)
Point is 99 should be the minimum standard for "super unleaded" as such 97 being sold at Esso currently / sainsburys and bp is a joke
xjay1337 said:
Um.... any car???
And especially if tuned for it that is an extra 20 hp not to mention increased knock resistance at higher inlet temperatures and boost pressures. My best economy was on 102 coming back from the ring I averaged over 375 miles around 34mpg at a high average speed (cruise control set at 90)
Point is 99 should be the minimum standard for "super unleaded" as such 97 being sold at Esso currently / sainsburys and bp is a joke
Yes sorry I meant is any production car sold in the UK actually tuned to run on 102 fuel?And especially if tuned for it that is an extra 20 hp not to mention increased knock resistance at higher inlet temperatures and boost pressures. My best economy was on 102 coming back from the ring I averaged over 375 miles around 34mpg at a high average speed (cruise control set at 90)
Point is 99 should be the minimum standard for "super unleaded" as such 97 being sold at Esso currently / sainsburys and bp is a joke
jamoor said:
xjay1337 said:
In Europe you cam get 102 from the pumps.
ok, now which cars take that?I think if you took any engine, you would find it would have a preference for fuels of different octane ratings in different engine load situations and different driving styles.
ninepoint2 said:
Sorry if this is a stupid question, but it seems that Ethanol is not good, why is that?
It depends. Firstly, in older cars it can harm the fuel delivery system.Also, it has a lower calorific value. So it can artificially boost RON numbers, you should get more power because the engine adapts positively to the higher RON, but a pure ethanol fuel actually contains less energy.
Evanivitch said:
ninepoint2 said:
Sorry if this is a stupid question, but it seems that Ethanol is not good, why is that?
It depends. Firstly, in older cars it can harm the fuel delivery system.Also, it has a lower calorific value. So it can artificially boost RON numbers, you should get more power because the engine adapts positively to the higher RON, but a pure ethanol fuel actually contains less energy.
ninepoint2 said:
Sorry if this is a stupid question, but it seems that Ethanol is not good, why is that?
Ethanol is an alcohol, and it doesn’t play nicely with rubber seals and fuel lines. Prolonged exposure to ethanol causes rubber to dry out, and become brittle. Any seal that relies on rubber o-rings or gaskets will eventually start to leak. This is a big problem for many older engines which use rubber fuel lines, and also any engine using rubber seals and o-rings in carburettors for example. Many car fires in older vehicles have been attributed to fuel leaks caused by ethanol damage.
Ethanol is both corrosive and hygroscopic, and can therefore accelerate corrosion in carburettors which rely on scrupulous cleanliness and very precise tolerances to work correctly.
Modern cars use ethanol resistant synthetic materials in place of rubber to avoid this problem, and of course carburettors were consigned to the history books for production cars some time ago, but there are a lot of older vehicles still out there in daily use that have fuel systems at risk of damage by the ethanol in modern fuel.
Falconer said:
Most the time I use Sainsbury’s 97 which seems fine but at odds with the experience of Esso and BP.
(Someone is going to tell me Sainsbury’s is Esso or BP).
Sainsburys is actually 99 Ron too, well here in Scotland at least. (Someone is going to tell me Sainsbury’s is Esso or BP).
I don’t know why it’s not marketed as such, but we lift 99 Ron from the terminals for all Sainsburys sites.
Edited to add: Sainsburys fuel is supplied and delivered by Greenergy (same as Esso, Costco, Co-op to name a few) but with no added additives.
Edited by W88CHY on Sunday 2nd August 20:53
Sainsburys petrol used to set my EML off on our E350.
Took me a few months to realise it was the fuel. There is one on the A11, so when on my way into London I would use it while eating my sausage McMuffin. I would get into London, Cavendish Square, and get all the way out again, but everytime I booted it as I hit the bottom of the M11 the EML light would come on.
I would scan the codes and it would say something about the Nox sensor and also about mis fuelling or unknown additive detected.
Going back to Shell and it would not do it.
I spoke to Mercedes originally and they said they had lots of Nox sensors failing. However, before doing anything I realised it was the fuel causing the eml. I did some digging and there was a software update in Germany to reduce the sensitivity. I tried to talk to Mercedes UK about it but they were adamant that the E350 didn't need Super Unleaded, so I gave up and just stopped using Sainsburys fuel in that car.
The German brochure said Super Benzin Plus by the way, but no mention of it anywhere in UK literature.
I actually rolling roaded the car as it was a noticeable difference running 99ron, it was 304hp on 99ron and on 95 it dropped to 286 I think it was. Not massive like my 335i was, that dropped nearly 30hp, it is obviously a turbo, but you could definitely feel it in the NA Merc, just felt more peppy in the lower rpm range.
MPG went up from 27 to 30 as well.
Funnily enough, the guy who bought it off me emailed me a few weeks later asking what scanner I said I used, as the eml had come on, I asked if he had used Sainsburys fuel and he had.
Took me a few months to realise it was the fuel. There is one on the A11, so when on my way into London I would use it while eating my sausage McMuffin. I would get into London, Cavendish Square, and get all the way out again, but everytime I booted it as I hit the bottom of the M11 the EML light would come on.
I would scan the codes and it would say something about the Nox sensor and also about mis fuelling or unknown additive detected.
Going back to Shell and it would not do it.
I spoke to Mercedes originally and they said they had lots of Nox sensors failing. However, before doing anything I realised it was the fuel causing the eml. I did some digging and there was a software update in Germany to reduce the sensitivity. I tried to talk to Mercedes UK about it but they were adamant that the E350 didn't need Super Unleaded, so I gave up and just stopped using Sainsburys fuel in that car.
The German brochure said Super Benzin Plus by the way, but no mention of it anywhere in UK literature.
I actually rolling roaded the car as it was a noticeable difference running 99ron, it was 304hp on 99ron and on 95 it dropped to 286 I think it was. Not massive like my 335i was, that dropped nearly 30hp, it is obviously a turbo, but you could definitely feel it in the NA Merc, just felt more peppy in the lower rpm range.
MPG went up from 27 to 30 as well.
Funnily enough, the guy who bought it off me emailed me a few weeks later asking what scanner I said I used, as the eml had come on, I asked if he had used Sainsburys fuel and he had.
Esso 99 Octane is now available
Synergy Supreme+ 99, our first 99 octane fuel, will be launched on forecourts across most of the UK* from tomorrow (Wednesday 14 October).
Esso Synergy Supreme+ 99 features three key attributes:
• higher octane levels, which help prevent ‘knock’-related performance losses in modern cars;
• double detergent additives compared to our regular petrol, giving the engine a deeper clean, to help improve performance and fuel efficiency;
• double protection additives, including friction-reducing molecules to help the moving parts work in engines work more efficiently.
Synergy Supreme+ 99, our first 99 octane fuel, will be launched on forecourts across most of the UK* from tomorrow (Wednesday 14 October).
Esso Synergy Supreme+ 99 features three key attributes:
• higher octane levels, which help prevent ‘knock’-related performance losses in modern cars;
• double detergent additives compared to our regular petrol, giving the engine a deeper clean, to help improve performance and fuel efficiency;
• double protection additives, including friction-reducing molecules to help the moving parts work in engines work more efficiently.
The octane rating of fuel doesn't make it more potent or make your engine run better at normal loads. It merely allows more compression before pre-detonation occurring (knock). Therefore higher RPM loads are possible and peak power will increase slightly.
My GT86 has four ECU maps you can switch between whilst driving. One is a 95 RON map (standard Toyota) and the others are 99 RON maps calibrated using Shell V Power. With the higher octane map there is a couple of hundred more RPM before the limiter cuts in and the engine a hies 214 BHP (up 20).
If you're just driving around well away from the redline there is no discernible difference between the maps/fuels.
My GT86 has four ECU maps you can switch between whilst driving. One is a 95 RON map (standard Toyota) and the others are 99 RON maps calibrated using Shell V Power. With the higher octane map there is a couple of hundred more RPM before the limiter cuts in and the engine a hies 214 BHP (up 20).
If you're just driving around well away from the redline there is no discernible difference between the maps/fuels.
Might have to try it see if the Saab V6 likes it.
I have tested with this car but with my 2.0T when commuting I would get 3-4MPG more on v power and Tesco 99 over standard stuff. Over a tankful the increase cost was evened out so I always used them.
This was tested over 140 mile daily commute setting cruise at 60mph.
I have tested with this car but with my 2.0T when commuting I would get 3-4MPG more on v power and Tesco 99 over standard stuff. Over a tankful the increase cost was evened out so I always used them.
This was tested over 140 mile daily commute setting cruise at 60mph.
Gassing Station | General Gassing | Top of Page | What's New | My Stuff