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Interesting view.
Thanks
Ira Erbs
Milwaukie, OR
1959 Austin Healey 100-6
1967 MGB Roadster
On Fri, Sep 22, 2023, 3:02 AM <h.duinhoven@planet.nl> wrote:
> It is not for the octane grade only, that premium fuel is the best choice.
> It is best to avoid ethanol additions as much as possible.
> In the Netherlands we still can choose between 5% or 10% ethanol.
> Premium fuel 5% is the best and offers the least chance of damaging the
> old type of fuel lines - hoses and gaskets in the carburettors.
> It also offers 98% octane, which had the least chance of pings.
> The final advantage of 5% ethanol is, that this fuel has a higher energy
> content, which gives a better mpg figure.
> So it is worth while to make the best choice.
> I even use 5% ethanol premium fuel in my daily driver Mazda 6, which gives
> a nice fuel economy and a clean fuel system.
>
> Cheers, Hans
> No BGT anymore - just enjoying MG news
>
>
> -----Oorspronkelijk bericht-----
> Van: Mgs <mgs-bounces@autox.team.net> Namens Paul Hunt
> Verzonden: donderdag 21 september 2023 09:47
> Aan: mgs@autox.team.net
> Onderwerp: Re: [Mgs] Petrol
>
> As already said if you have a low compression engine then lower octane
> should be fine. If high compression then you will get the benefit of
> better performance and economy with higher octane. Low ethanol is better
> in both cases.
>
> Because the fuel today is so different to when these cars were first
> produced the original timing specs are no longer relevant. If you get
> pinking then back off the timing until you don't at any combination of
> throttle opening, revs and load. With high compression and high octane try
> advancing bit by bit until you get pinking, then back off a bit till you
> don't.
>
> You are less likely to get pinking on low compression even with low octane
> fuel, so if you can run the book figures for timing without pinking then do
> so. You might get a bit better by advancing, but you can advance so far
> that it stalls the starter but still doesn't pink. That's obviously too far.
>
> PaulH.
>
> On 20/09/2023 16:32, i erbs wrote:
> > I just got my B running for the first time and have a newbie question.
> > I have looked online and got confusing answers.
> > What grade petrol do I use? Must I use premium grade? Can I use regular?
> > Thanks.
> >
> > Ira Erbs
> > Milwaukie, OR
> > 1959 Austin Healey 100-6
> > 1967 MGB Roadster
> >
> > _______________________________________________
> >
> > Mgs@autox.team.net
> > Donate: http://www.team.net/donate.html Suggested annual donation
> > $12.75
> >
> > Archive: http://www.team.net/pipermail/mgs
> > http://autox.team.net/archive
> >
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> > http://autox.team.net/mailman/options/mgs/paulbhunt73@gmail.com
> _______________________________________________
>
> Mgs@autox.team.net
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Content-Transfer-Encoding: quoted-printable
<div dir=3D"auto">Interesting view.<div dir=3D"auto">Thanks<br><br><div dat=
a-smartmail=3D"gmail_signature" dir=3D"auto">Ira Erbs<br>Milwaukie, OR<br>1=
959 Austin Healey 100-6<br>1967 MGB Roadster</div></div></div><br><div clas=
s=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Fri, Sep 22, 202=
3, 3:02 AM <<a href=3D"mailto:h.duinhoven@planet.nl";>h.duinhoven@planet=
.nl</a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"marg=
in:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">It is not for th=
e octane grade only, that premium fuel is the best choice. <br>
It is best to avoid ethanol additions as much as possible. <br>
In the Netherlands we still can choose between 5% or 10% ethanol. <br>
Premium fuel 5% is the best and offers the least chance of damaging the old=
type of fuel lines - hoses and gaskets in the carburettors. <br>
It also offers 98% octane, which had the least chance of pings.<br>
The final advantage of 5% ethanol is, that this fuel has a higher energy co=
ntent, which gives a better mpg figure. <br>
So it is worth while to make the best choice. <br>
I even use 5% ethanol premium fuel in my daily driver Mazda 6, which gives =
a nice fuel economy and a clean fuel system.<br>
<br>
Cheers, Hans<br>
No BGT anymore - just enjoying MG news<br>
<br>
<br>
-----Oorspronkelijk bericht-----<br>
Van: Mgs <<a href=3D"mailto:mgs-bounces@autox.team.net"; target=3D"_blank=
" rel=3D"noreferrer">mgs-bounces@autox.team.net</a>> Namens Paul Hunt<br=
>
Verzonden: donderdag 21 september 2023 09:47<br>
Aan: <a href=3D"mailto:mgs@autox.team.net"; target=3D"_blank" rel=3D"norefer=
rer">mgs@autox.team.net</a><br>
Onderwerp: Re: [Mgs] Petrol<br>
<br>
As already said if you have a low compression engine then lower octane shou=
ld be fine.=C2=A0 If high compression then you will get the benefit of bett=
er performance and economy with higher octane.=C2=A0 Low ethanol is better =
in both cases.<br>
<br>
Because the fuel today is so different to when these cars were first produc=
ed the original timing specs are no longer relevant. If you get pinking the=
n back off the timing until you don't at any combination of throttle op=
ening, revs and load.=C2=A0 With high compression and high octane try advan=
cing bit by bit until you get pinking, then back off a bit till you don'=
;t.<br>
<br>
You are less likely to get pinking on low compression even with low octane =
fuel, so if you can run the book figures for timing without pinking then do=
so.=C2=A0 You might get a bit better by advancing, but you can advance so =
far that it stalls the starter but still doesn't pink. That's obvio=
usly too far.<br>
<br>
PaulH.<br>
<br>
On 20/09/2023 16:32, i erbs wrote:<br>
> I just got my B running for the first time and have a newbie question.=
<br>
> I have looked online and got confusing answers.<br>
> What grade petrol do I use? Must I use premium grade? Can I use regula=
r?<br>
> Thanks.<br>
><br>
> Ira Erbs<br>
> Milwaukie, OR<br>
> 1959 Austin Healey 100-6<br>
> 1967 MGB Roadster<br>
><br>
> _______________________________________________<br>
><br>
> <a href=3D"mailto:Mgs@autox.team.net"; target=3D"_blank" rel=3D"norefer=
rer">Mgs@autox.team.net</a><br>
> Donate: <a href=3D"http://www.team.net/donate.html"; rel=3D"noreferrer =
noreferrer" target=3D"_blank">http://www.team.net/donate.html</a> Suggested=
annual donation=C2=A0 <br>
> $12.75<br>
><br>
> Archive: <a href=3D"http://www.team.net/pipermail/mgs"; rel=3D"noreferr=
er noreferrer" target=3D"_blank">http://www.team.net/pipermail/mgs</a> <br>
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" target=3D"_blank">http://autox.team.net/archive</a><br>
><br>
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</blockquote></div>
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