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Super Unleaded
- Buckz
- Senior Member
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- Joined: Mon Dec 05, 2016 11:00 am
- Location: West sussex
Super Unleaded
Every 2-3 tanks I fill up with vpower.. last 3 tanks were vpower only and I've personally noticed 0 difference, can't see inside the engine tho
Next tank is gunna be a super from supermarket but had no issues with 95.
Next tank is gunna be a super from supermarket but had no issues with 95.
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- Location: Suffolk
Super Unleaded
Doesn't the lower octane stuff contain relatively more ethanol (?) than the higher octane stuff? And ethanol burns at a higher temperature?
I know that even in my little 850 Mini I now need to run the higher octane fuel just to avoid severe detonation when the engine is under load (most of the time). The same is true of the Alfa we have.
It just seems natural to run the higher octane fuel in the other 2 modern cars. It's only a small extra cost per tank and amounts to less than £200 per year.
I know that even in my little 850 Mini I now need to run the higher octane fuel just to avoid severe detonation when the engine is under load (most of the time). The same is true of the Alfa we have.
It just seems natural to run the higher octane fuel in the other 2 modern cars. It's only a small extra cost per tank and amounts to less than £200 per year.
G29 S30i in SFR - my wife's car and her third Z
BMW M2C - gone, replaced with an i4, but its only use is shopping, the Z is our main touring vehicle
Long gone, but not forgotten - 1988 E30 M3
BMW M2C - gone, replaced with an i4, but its only use is shopping, the Z is our main touring vehicle
Long gone, but not forgotten - 1988 E30 M3
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Super Unleaded
Hmm this old chestnut again...
With my home Mapped turbo cars I use SUL, without a doubt. Purely from the 'insuring against pre det' argument.
With the Zed, I have owned for about 6 months, until recently, every drop of juice I put in it was SUL. I recently filled with 95 Ron (accidentally) and strangely found my mileage slightly better (go figure). 99ron=32mpg avg , 95ron=36mpg avg. No noticeable determination in performance and my det detector certainly isn't pinging.
I'm going to try a few tankfuls of the cheaper stuff for the sake of, very unscientific, experimentation. If anyone is interested I'll let you know how it goes.
With my home Mapped turbo cars I use SUL, without a doubt. Purely from the 'insuring against pre det' argument.
With the Zed, I have owned for about 6 months, until recently, every drop of juice I put in it was SUL. I recently filled with 95 Ron (accidentally) and strangely found my mileage slightly better (go figure). 99ron=32mpg avg , 95ron=36mpg avg. No noticeable determination in performance and my det detector certainly isn't pinging.
I'm going to try a few tankfuls of the cheaper stuff for the sake of, very unscientific, experimentation. If anyone is interested I'll let you know how it goes.
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- Garvin
- Member
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- Location: Cambridgeshire
Super Unleaded
The higher the octane rating then the more the ECU can advance the ignition and the engine can run more efficiently. This is hardly noticeable in NA engines but can make a very noticeable difference in turbocharged engines. This does generally increase the performance of the car.
In theory this will increase mpg but only if all other things are equal e.g. speed and acceleration kept the same. In practice most enjoy the increased performance, particularly improved acceleration, so the improved mpg doesn't really come to pass.
Vendors claim better additives in their SUL re engine cleaning and whilst this is certainly true between premium and supermarket brands I'm not convinced that there is a substantial difference between regular and super for the same brand.
You pays your money and takes your choice.
In theory this will increase mpg but only if all other things are equal e.g. speed and acceleration kept the same. In practice most enjoy the increased performance, particularly improved acceleration, so the improved mpg doesn't really come to pass.
Vendors claim better additives in their SUL re engine cleaning and whilst this is certainly true between premium and supermarket brands I'm not convinced that there is a substantial difference between regular and super for the same brand.
You pays your money and takes your choice.
- ronk
- Lifer
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- Location: Durham
Super Unleaded
35is Info on fuel flap (Sept 2016)
You don't stop playing when you get old - You get old when you stop playing!
So I bought a 35is with all the toys to play with.
So I bought a 35is with all the toys to play with.
- Yorkie Z
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- ronk
- Lifer
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- Location: Durham
Super Unleaded
I have a PDF file on the computer produced in respect of Tesco premium petrol (Monentum) - from memory it's a proper scientific report based on proper measurements and not just random observations and hunches.
I will dig it out and post asap .
I will dig it out and post asap .
You don't stop playing when you get old - You get old when you stop playing!
So I bought a 35is with all the toys to play with.
So I bought a 35is with all the toys to play with.
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Super Unleaded
forget ron rating for a second here event though they have a knock sensor and will adjust.
Tesco 99 momentum has 4 times the additives than normal tesco fuel - these additives help keep your internals cleaner. proof of this has been shown at various car shows with cameras inside of engines that have used either fuel wholly for a number of miles.
then you do certainly get added benefit of a few more mpg so it evens out in terms of cost of the fuels.
my problem is that the only garage near me or on my route is an asda. i'd prefer it was tesco for 99 momentum or a BP for ultimate.
consensus is if you have a half decent car buy premium fuel. if you drive a run of the mill cheap car then don't bother. so i try to use premium whenever i can in the z4. the wife's mini gets asda every time with the odd tank of BP ultimate to give it a bit of a clean, however it is mainly asda in the mini 99% of the time.
Tesco 99 momentum has 4 times the additives than normal tesco fuel - these additives help keep your internals cleaner. proof of this has been shown at various car shows with cameras inside of engines that have used either fuel wholly for a number of miles.
then you do certainly get added benefit of a few more mpg so it evens out in terms of cost of the fuels.
my problem is that the only garage near me or on my route is an asda. i'd prefer it was tesco for 99 momentum or a BP for ultimate.
consensus is if you have a half decent car buy premium fuel. if you drive a run of the mill cheap car then don't bother. so i try to use premium whenever i can in the z4. the wife's mini gets asda every time with the odd tank of BP ultimate to give it a bit of a clean, however it is mainly asda in the mini 99% of the time.
- Dave1971
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- Joined: Sun Jan 22, 2012 7:20 pm
Super Unleaded
A few years back I remember watching a test on 5th Gear, can't remember all the cars they tested but it ranged from a Yaris to a Scooby. The nuts and bolts of it was if you run a grandma's shopping trolley then don't waste your money but if you have a performance car, particularly a turbo/supercharged car then it does make a difference.
Zed No 1 2004 e85 Z4 2.2 se
Zed No 2 2007 e85 Imola Red Z4MR
Zed No 3 2006 e85 Ruby Black 3.0si Roadster
Zed No 4 2009 e89 Deep see blue 35i sDrive
Zed No 5 2006 e85 Titan silver 3.0si Roadster
Zed No 6 2004 e85 Black Sapphire Alpina Roadster S Lux #073
Zed No 2 2007 e85 Imola Red Z4MR
Zed No 3 2006 e85 Ruby Black 3.0si Roadster
Zed No 4 2009 e89 Deep see blue 35i sDrive
Zed No 5 2006 e85 Titan silver 3.0si Roadster
Zed No 6 2004 e85 Black Sapphire Alpina Roadster S Lux #073
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Super Unleaded
Yes that 5th gear test gave 4 BHP increase on a turbo car. V power in mine. That 4 bhp might come in handy at the traffic lights one day
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Super Unleaded
That would suggest Shell V-Power is above the recommended 91-98...
That's interesting, I'll check my 35i if/when I finally get it back.
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Super Unleaded
If you read the 'Honest John' motoring column in the Telegraph he is a big fan of the better quality higher octane fuel. He claims it helps to keep the engine clean and improves mpg. On the whole what he writes is sensible and his advice is usually sound. I don't know whether I am just a sucker but I use it in the Z4 but not in the everyday car.
whether it lives up to it's claims I don't know.
whether it lives up to it's claims I don't know.
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Super Unleaded
BMW 2010 Owner's Handbook (23i, 30i, 35i, 35iS) Munich, pub. BMW
page 189
"It is recommended to use unleaded premium grade petrol with 95 RON."
"Unleaded fuel qualities with 91 RON and higher are permitted."
page 189
"It is recommended to use unleaded premium grade petrol with 95 RON."
"Unleaded fuel qualities with 91 RON and higher are permitted."
Vidi, vici, veni
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- Lifer
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- Joined: Tue Oct 26, 2010 2:52 pm
Super Unleaded
Sticker or not, I reiterate I've done this test on a dyno and premium fuel made more bhp.