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Old 29 December 2008, 16:13   #21
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I think it does take quite a few months to go off, 6 months or so. But i guess Mercury are covering there backs by saying use fuel stabilizer!! and possibly as the engines are used worldwide they cant always be sure how good or old the fuel is that is going in!!! It seemed to be worse with pre mixed fuel as it went off and left oil in the carbs etc. Unleaded is the worse for going off.
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Old 29 December 2008, 17:47   #22
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http://rib.net/forum/showthread.php?t=22297


Not sure how to link in threads but this has beed talked about alot before!!
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Old 05 January 2009, 20:39   #23
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To follow up on this one I emailed BP and asked them their opinion re unleaded petrol 'going off'. This was their reply received just today;

Thank you for your email.

Over a period of time petrol quality can deteriorate. If the product is
being stored over the winter months it is unlikely to have been affected
too badly for use in applications such as a lawnmower.
If this is used for other purposes such as a boat then I would recommend
dilution with fresh product at a 50/50 ration just as a safeguard
measure.

I hope this helps.

Kind Regards

L
Customer Care-Retail
BP Oil UK Ltd.
Witan Gate House
500-600 Witan gate
Milton Keynes
MK9 1ES

This adds a whole new dimension to the discussion. Do we need stabiliser or octane booster mixes at all? Surely this suggests that we don't?

What do you all think?
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Old 05 January 2009, 22:31   #24
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Quote:
Originally Posted by tonymac View Post

This adds a whole new dimension to the discussion. Do we need stabiliser or octane booster mixes at all? Surely this suggests that we don't?

What do you all think?
Yes, you do need stabiliser-if you stick fresh fuel in the tanks it'll take a very long time to get to the cylinders through the fuel system without the engine running. You need it to fire up on what's in it.

Besides, it's a very bad idea to leave internal tanks half full as it'll encourage condensation to form.
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