Storage of fuel for paramotor ( mixture )

[Krishna]

Hi Pilots,
Just have a look on my conversation with Castrol Technical Dep-t re: storage of petrol with oil time.

От кого: "Barley, Elspeth" <elspeth.barley@uk.bp.com>
Кому: "Andriy Senchynevych" <x-krishna@mail.ru>
Дата: Четверг, 8 августа 2013, 12:47 +01:00
Тема: RE: Technical enquiry


>
> Hello Andriy
>
> You are correct that the big issue in storage is whether or not the light fractions in the oil are able to escape ie evaporate. If the storage is airtight then this is not a problem and the pre-mixed fuel remains in good condition.
>
> However, I wouldn't personally risk as long as 3 months in a situation where I was up in the air - I'd want to make sure first of all that I was safe, so my storage time would be a lot less than this to ensure self preservation!
>
> Kind regards
> Elspeth
>
> -----Original Message-----
> From: Andriy Senchynevych [mailto:x-krishna@mail.ru]
> Sent: 08 August 2013 12:11
> To: Barley, Elspeth
> Subject: Re: Technical enquiry
>
> Yes, thank U. Paramotor pilots are using Castrol oil in proportion with 95 unleaded petrol. There is some opinion that even in germetic container oil will lost lubricant abilities after 3 days, some pilots keep the mixture up to 3 month and nothing happened. My opinion , as ex ch. Engineer that nothing will happened if the tank for storage is germetic and there is no petrol evaporation. What is your opinion ?
>
> Четверг, 8 августа 2013, 11:47 +01:00 от "Barley, Elspeth" < elspeth.barley@uk.bp.com >:
> >
> > Hello Andriy
> >
> > I apologise but I’m not sure I understand your question, so bear with me.
> >
> > Are you asking how long before you use the fuel can you pre-mix with the lubricant?
> >
> > Ie could you mix a big batch of fuel per month and then use it up at different times?
> >
> > If that is the question, then there is a lot of debate about it with regard to motorcycles in particular and I’m sure the same rules apply to paramotor engines
> >
> > Some manufacturers advise that a new batch be mixed each time before use, but this may be a bit extreme.
> >
> > Storage of the pre-mixed fuel is important too – you need an airtight container – this normally means a metal container, but if a plastic one is completely airtight this should be fine. Do not use pre-mix left over in the tank.
> >
> > General advise on that is that up to a month should be fine. The real test is does the engine start cleanly on an older pre-mix – if it doesn’t then you know that it has deteriorated in storage.
> >
> > You are in a paramotor, so I would err on the side of caution and not store pre-mixed fuel for too long – you may wish to bring the month down to 3 weeks max for example
> >
> > I do hope that this answers your query and that I’ve interpreted your question correctly
> >
> > Kind regards
> > Elspeth
> >
> > Elspeth Barley
> > Automotive Technical Manager
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