Petrol (Gas!)

[lotuselan2]

David

Don't tell that to the EPA. They have been working for 20 years to lower
the vapor pressure of gasoline and adjusting it for the seasons. Certainly
if you buy "winter" gas and store it for the summer it would vaporize a lot
but that is not "our" driving pattern. "Old" gas used to contain a lot of
butane to increase octane and it was very volatile, butane is very low in
gasoline now but a bit more in winter. If you are in an ethanol area the
EPA allows a waiver on the vapor pressure limit if the ethanol is produced
from corn or other Ag. product. Losing ethanol will lower the oxygen
content and octane of your fuel. (My Chem E degree just came out!)



Ken

'69 Lotus Elan +2 with BDR

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From: ***@***.***lto:***@***.*** Behalf
Of ALLEN, David
Sent: Thursday, August 18, 2005 7:40 AM
To: ***@***.***
Subject: RE: [LotusElan.net] Re: Petrol (Gas!)



You were all correct. I added fresh petrol and the car ran OK. Obviously
modern petrol must be more prone to "going off" if left for any period of
time, as this never used to be a problem.

Consequently, if you have not been following this thread and are storing a
car for several months, remember you will have to add fresh petrol before it
will run well.

David

-----Original Message-----
From: Lotus [mailto:***@***.***
Sent: 17 August 2005 16:36
To: ***@***.***
Subject: RE: [LotusElan.net] Re: Petrol (Gas!)


This is the same product I referred to earlier this week, but I could not
remember the name.



Ken

'69 Lotus Elan +2 with BDR

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From: ***@***.***lto:***@***.*** Behalf
Of Steve B
Sent: Tuesday, August 16, 2005 10:38 PM
To: ***@***.***
Subject: [LotusElan.net] Re: Petrol (Gas!)



Gas will leave varnish deposits after two to three months. You can
run the tank to empty but this leaves two possible bad effects:
1. an empty tank may begin to develop rust indide the tank, which can
flake off leter on.
2. Even if the tank and the carbe are totally empty there are still
small passages in the carbs which can varnish over and require a
complete teardown to clean out.

I use (in the USA) a product called Stabil (I'm sure there are
others) which can keep the fuel fresh fir four to six mnonths. You
add it to the tank and run the engine long enough to ensure it has
beed pumped into the carbs. Then top up the fuel tank.

Works in my motorcycles, lawn mowers, cars, etc. Everything I have
that uses fuel and is idle for long periods.

Even though I live near New York City I always find a few days to use
the Elan in the winter and the gas never gets old.

Steve B
1978 FIAT X1/9
1969 Lotus Elan
1996 VW GTI VR6
1992 Honda Nighthawk 750


--- In ***@***.***, "ALLEN, David" <david.allen@e...>
wrote:



















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["freddy22112211"]

I don't drive my car for 6 or more months, at all, over the winter,
and it runs exactly the same when I restart. So either our gas/petrol
is different here in southern Germany, or the winters are so cold,
nothing evaporates!
Gordon

--- In ***@***.***, "ALLEN, David" wrote: