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Wales
by Joske Vermeule, September 1
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Forums39
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Jun 14th, 2026
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Joined: Dec 2009
Posts: 37,468 Likes: 988
Tricky Dicky Member of the Inner Circle
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Tricky Dicky Member of the Inner Circle
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hygroscopic [ˌhaɪgrəˈskɒpɪk] adj (Chemistry) (of a substance) tending to absorb water from the air hygroscopically adv hygroscopicity [ˌhaɪgrəskəʊˈpɪsɪtɪ] n Collins English Dictionary – Complete and Unabridged © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003 I remain Classically unmoved 
2009 4/4 Sport Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Con Green +8 prev
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Joined: May 2009
Posts: 3,727
Green & Grown Up Talk Morgan Addict
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Green & Grown Up Talk Morgan Addict
Joined: May 2009
Posts: 3,727 |
The increased percentage of ethanol in 95 Octane petrol has raised concerns. Thanks for sharing Brian. Useful info worth knowing. 
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Joined: Oct 2011
Posts: 1,947
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Oct 2011
Posts: 1,947 |
Been pondering this all day  As plenty have said, ethanol absorbs water. Calling it hydro, or hygro is really just nitpicking. So the answer to the second question is wrong although you can quibble and say the ethanol doesn't cause corrosion, but the water it absorbs does. So dry fuel is ok, but give it a few days and it won't be dry. Got my doubts the advice to store a car with a full fuel tank is right as well. Car tanks breathe (and need to) so the fuel will absorb atmospheric water. So the more fuel it contains, the more water it can absorb. Plus, the best way to start a stored car is to sling in some fresh fuel from a sealed can - but you'll not be doing that if the tank is full already.
1930 Super Sports Aero 'The Elk'
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Joined: Apr 2012
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Charter Member
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Charter Member
Joined: Apr 2012
Posts: 5,013 Likes: 32 |
hygroscopic [ˌhaɪgrəˈskɒpɪk] adj (Chemistry) (of a substance) tending to absorb water from the air hygroscopically adv hygroscopicity [ˌhaɪgrəskəʊˈpɪsɪtɪ] n Collins English Dictionary – Complete and Unabridged © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003 I remain Classically unmoved I agree that that in this definition, it is 'hygro'. My point was merely that anything 'hydro' is normally water related. Je reste ma valise. 
+8 4.8
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Joined: Dec 2009
Posts: 37,468 Likes: 988
Tricky Dicky Member of the Inner Circle
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Tricky Dicky Member of the Inner Circle
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Posts: 37,468 Likes: 988 |
Lets go get some Hydrotherapy man till the sun comes out     I worked on the RN Hydrographic vessel Hydra back in the day providing the high accuracy navaids necessary to enable them to correct the Admiralty charts so am fully aware of the definition of Hydra and it's many derivatives even if it is viewed by some as nitpicking being right is no crime, not caring less is. That's my case packed too. Regards
Last edited by 4/4sportsfun; 09/03/13 07:07 PM.
2009 4/4 Sport Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Con Green +8 prev
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Joined: Sep 2006
Posts: 7,363
Talk Morgan Guru
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OP
Talk Morgan Guru
Joined: Sep 2006
Posts: 7,363 |
I was using 'hydro' as it was used in the OP by the BP guy.
Maybe that's their get out clause! Ah, it's hygroscopic, yes, but not hydroscopic. Sorry guys, there was a typo in what I posted, it should have read hygroscopic!  Anyway, new balls...
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Joined: Dec 2009
Posts: 37,468 Likes: 988
Tricky Dicky Member of the Inner Circle
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Tricky Dicky Member of the Inner Circle
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Posts: 37,468 Likes: 988 |
There's always another game ahead I agree.
It is a most interesting and very timely for me as on Thursday I visited someone who is a little serious with Landrovers S1&2's 5 (in immaculate condition) at last count plus a very early Rangerover. Various other interesting classics. He mentioned the upcoming Ethanol concerns for classic owners and the fact that unless they were club members they could well be unaware of the advise to use Super Unleaded.
2009 4/4 Sport Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Con Green +8 prev
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Joined: Aug 2012
Posts: 983
Talk Morgan Regular
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Talk Morgan Regular
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He mentioned the upcoming Ethanol concerns for classic owners and the fact that unless they were club members they could well be unaware of the advise to use Super Unleaded.
That would be "... advice to use Super Unleaded" I suppose? 
Philip.
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Joined: Dec 2009
Posts: 37,468 Likes: 988
Tricky Dicky Member of the Inner Circle
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Tricky Dicky Member of the Inner Circle
Joined: Dec 2009
Posts: 37,468 Likes: 988 |
He mentioned the upcoming Ethanol concerns for classic owners and the fact that unless they were club members they could well be unaware of the advise to use Super Unleaded.
That would be "... advice to use Super Unleaded" I suppose? Probly
2009 4/4 Sport Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Con Green +8 prev
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Joined: Dec 2008
Posts: 22,370 Likes: 354
Roadster Guru Member of the Inner Circle
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Roadster Guru Member of the Inner Circle
Joined: Dec 2008
Posts: 22,370 Likes: 354 |
After years and years of laying up my MG's I concluded that a full tank was the best fix, limiting the amount of air in contact with the fuel. The only time I had fuel go off was when I left a couple of gallons in the tank, and it really did go off in a big way. The smell was strange, the car wouldn't start and the fuel lines were coated with a green waxy deposit. For the last few years of MG motoring I added fuel preserver to the full tank.
The other effect was that condensation gathered at the lowest point - water being heavier than petrol, and the tank corroded around the pick up and along the leading edge of the tank - the lowest points. Everywhere else in the tank was pristine - viewed with a torch through the sender hole.
DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
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