Fuel

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MickB
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Location: Preston Lancs

Fuel

Postby MickB » Tue Jul 31, 2018 8:19 am

New to the world of BMWs and have been dutifully reading the handbook for my 1200s. I was a little surprised to see that that the fuel of choice was 98 or super unleaded. Just wondering what people are using and can anyone notice the difference between the 98 and 95 octane fuels?

User avatar England
milleplod
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Re: Fuel

Postby milleplod » Tue Jul 31, 2018 9:12 am

I mainly used 95 in my 1200ST for the 6/7 years I owned it - it ran fine, I never noticed any loss of performance tbh. Every now and then, I gave it a tankful of 98 - I do think it ticked over a little smoother, and pickup was perhaps a bit better at lower, round-town speeds. Some people say that mpg is better on 98, bit academic really when it costs more! Personally, I wouldn't fret about it - doesn't it say somewhere in the handbook that its OK to use 95, I can't remember tbh!

Pete
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Australia
Justcruising
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Re: Fuel

Postby Justcruising » Tue Jul 31, 2018 11:57 am

Fuel Octane requirements is predominantly dictated by the engine compression ratio to assist in controlling the rate of fuel combustion to optimise performance while avoiding pre-ignition (damaging). The R12S has quite a high CR at 12.5:1, for a petrol engine and hence the recommended RON98 Premium Unleaded Fuel specified. Fortunately the engine management system is smart enough to adjust (retard) the ignition timing for lower octane fuels to avoid pre-ignition. The resulting change in performance is probably not easily detectable with most casual riding. Personally i don’t see the point in owning a high performance engine in anything, then running a substandard fuel ... but everyone to their own. I’d also avoid any ethanol blends if possible.
2006 R1200S (Magma-Red/titan-silver) - Michelin PR4s, Akrapovic slip-on silencer, Ohlin suspension, Ilmberger Carbon hugger & Carbon valve-covers, Corbin seat.

2010 R1200R
2004 R1200C Montauk

Great Britain
Humbug
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Re: Fuel

Postby Humbug » Tue Jul 31, 2018 8:07 pm

I use 98 when available as I am of the same mind as Justcruising. Don't think BMW have shares in all of the fuel companies so no benefit in specifying 98 unless its needed. I use 95 as well and difficult to tell the difference on the road but i'd rather not use the knock sensors to retard the timing when i can use 98 and have them sit quietly in the background doing nothing.
Last edited by Humbug on Tue Jul 31, 2018 8:09 pm, edited 1 time in total.

England
kfrogzx7
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Location: Suffolk

Re: Fuel

Postby kfrogzx7 » Tue Jul 31, 2018 8:27 pm

Humbug wrote:I use 98 when available as I am of the same mind as Justcruising. Don't think BMW have shares in all of the fuel companies so no benefit in specifying 98 unless its needed. I use 95 as well and difficult to tell the difference on the road but i'd rather not use the knock sensors to retard the timing when i can use 98 and have them sit quietly in the background doing nothing.

+1 [smilie=biker.gif]
Simon.
R1100s, R1200st, R1150rs. K100rs.

Great Britain
MickB
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Location: Preston Lancs

Re: Fuel

Postby MickB » Tue Jul 31, 2018 9:42 pm

Wise words indeed. 98 it is. First ride tomorrow!! :D

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GerryB
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Re: Fuel

Postby GerryB » Wed Aug 01, 2018 5:06 pm

Here in Spain , mostly 95 , and 95 super ....

So , I use the 95 super, much dearer , but I'm assured there is no rubbish in it .

My bike runs pretty good , so I'm not complaining .
Old man ... now .
Ex Off Road & Enduro Rider...

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BoxerCup R
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Location: Edinburgh, Scotland

Re: Fuel

Postby BoxerCup R » Thu Aug 02, 2018 8:25 am

Highest Octane I can get every time for my car and bikes, irrespective of price I want the engines to have the best available 8)

England
Tommy T
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Re: Fuel

Postby Tommy T » Thu Aug 23, 2018 10:34 am

Off to Italy on the 11S just wondering about what fuel to use?
Should I avoid using E10.
The bike is a 2000 model with 7000 miles on the clock.

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Boxered
Route Master
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Re: Fuel

Postby Boxered » Thu Aug 23, 2018 9:53 pm

Tommy T wrote:Off to Italy on the 11S just wondering about what fuel to use?
Should I avoid using E10.
The bike is a 2000 model with 7000 miles on the clock.
?

So its an 11S then? if so just put in whatever is cheapest,
I have to say that my R12S runs much nicer, smoother and happier on premium 97/98/99
and fuel consumption is much better too, I often have to use 95 'cos it's difficult to get
premium in most parts of Wales and Yorks ( locals too tight to pay the price I reckon :wink: )
On 95 it can run ok, but usually only if its a decent brand like BP/Shell? Esso/ Texaco.
If its Murco or some other dodgy outfit it generally runs rougher, down on power and the consumption drops
considerably.
All in my 'umble opinion of course YMMV

Seve
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Australia
Justcruising
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Location: Brisbane, Australia

Re: Fuel

Postby Justcruising » Fri Aug 24, 2018 4:29 am

Tommy T wrote:Off to Italy on the 11S just wondering about what fuel to use?
Should I avoid using E10.
The bike is a 2000 model with 7000 miles on the clock.

Check your Rider's Manual for the correct fuel specification. I believe the R11S has a compression Ratio of 11.3:1 which should require 95RON premium unleaded for optimum performance and longevity. WRT ethanol blended fuels, I would recommend avoiding them at all cost in our bikes … this article might help convince you. https://www.cycleworld.com/real-world-look-at-alcohol-in-your-tank .

Safe trip & good luck!
Last edited by Justcruising on Sat Sep 01, 2018 9:09 pm, edited 1 time in total.
2006 R1200S (Magma-Red/titan-silver) - Michelin PR4s, Akrapovic slip-on silencer, Ohlin suspension, Ilmberger Carbon hugger & Carbon valve-covers, Corbin seat.

2010 R1200R
2004 R1200C Montauk

Great Britain
Crazy Kev
Posts: 42
Joined: Mon Apr 24, 2017 8:26 pm

Re: Fuel

Postby Crazy Kev » Fri Aug 24, 2018 2:48 pm

I used 4* for 4yrs - now using 5* 0ver the last few months and have noticed a better response!
Its Not a Phase, Its My Life,
Its Not a Hobby, It's. My Passion,
Its Not For Everyone, It Is For Me.

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boxerscott
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Re: Fuel

Postby boxerscott » Wed Aug 29, 2018 9:35 pm

Tommy T wrote:Off to Italy on the 11S just wondering about what fuel to use?
Should I avoid using E10.
The bike is a 2000 model with 7000 miles on the clock.
All petrol has ethanol in it I do not think E0 exists at our filling stations, E10 is the higher percentile ethanol additive. E5 is more available in uk and that is what Barry Sheene used so it must be good! E10 is more common in Europe you may have no choice, Higher octane fuel still contains the ethanol percentile. Not sure I have noticed any difference putting in Higher spec fuel than lower spec. What is not good is leaving the bike standing for long periods of time. The Ethanol element separates and then gets up to mischief with fuel pump assemblies, plastics and ferrous stuff. If you don't use it you lose it! This is one situation where the higher alcohol percentage is not good. lets face it when the fuel lamp is on and mile counter is low you have little choice.
I am the Village Green Preservation Society. God Bless Strawberry Jam and all it`s variety.

MR SHEEN
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Location: BIRMINGHAM

Re: Fuel

Postby MR SHEEN » Sat Sep 01, 2018 12:51 pm

Unless you are on the Autopista you will not get 98/99 good fuel period and forget paying cash most fuel stations are unmanned and automatic so carry more than one credit card some of ours didn’t work.
A CLEAN MACHINE IS A HAPPY MACHINE


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