How long does fuel keep its octane rating?
Discussion
And what is a good octane booster to use?
I brimmed the tank on my snotter for a mapping session which was unexpectedly (there is always something though isn't there?!) cut short due to the 750 injectors maxing out.
It may end up being 3 - 4 weeks till It goes back with bigger ones fitted and I am worried about falling short of the mark due to stale fuel.
Any ideas folks?
I brimmed the tank on my snotter for a mapping session which was unexpectedly (there is always something though isn't there?!) cut short due to the 750 injectors maxing out.
It may end up being 3 - 4 weeks till It goes back with bigger ones fitted and I am worried about falling short of the mark due to stale fuel.
Any ideas folks?
I don't know about octane, as that is a specific measurement, but I DO know from experience that as the "light ends" (most volatile & therefore easiest ignited) of the fuel slowly evaporate over a period of time the fuel does become less easy to ignite.
Having said that I am talking months rater than a few weeks.
I think you will probably be ok.
Having said that I am talking months rater than a few weeks.
I think you will probably be ok.
My bike can sit for months on old fuel and never miss a beat.
My Mondeo 2.5(5 cyl) had been unused for a couple of months last year and had a low rpm hiccup/hesitation/misfire which cured its self after fresh fuel was added/mixed in.
This year the same thing,while remaining unused the half tank of fuel left once again seemed to be producing a low rpm hiccup,this time I let the fuel light come on first and after re-fuelling the hiccup once again vanished.
The same again with my lawn mower/tractor,a real bd to start on old fuel and then takes a good ten minutes of running by holding the governor and revving the nuts off it before it will idle.
A drop of fresh petrol and its transformed(it`s had no blades since 2004 but its still good fun for whizzing round our field on and will still remove long grass to some degree
My Mondeo 2.5(5 cyl) had been unused for a couple of months last year and had a low rpm hiccup/hesitation/misfire which cured its self after fresh fuel was added/mixed in.
This year the same thing,while remaining unused the half tank of fuel left once again seemed to be producing a low rpm hiccup,this time I let the fuel light come on first and after re-fuelling the hiccup once again vanished.
The same again with my lawn mower/tractor,a real bd to start on old fuel and then takes a good ten minutes of running by holding the governor and revving the nuts off it before it will idle.
A drop of fresh petrol and its transformed(it`s had no blades since 2004 but its still good fun for whizzing round our field on and will still remove long grass to some degree
Different operating environment I know, but when we used to run 100cc 2 stroke karts, the super unleaded would 'go off' noticeably after a couple of weeks. I have also had a 'fresh' can of fuel from a garage give problems - obviously an old batch. The motors would have a very noticeable hesitation out of corners and would also lack top end power. They were obviously much more extreme than a normal road engine, running up to 22,000 rpm!
Kim
Kim
Over her in the U.S.of A., I've used a product for years known as 'STA-BIL'. A fuel stabilizer & performance improver. An 8-ounce plastic bottle 'treats' 20 gallons of fuel. If the fuel in my jug/cell/race car is planned to sit for over 30 days,I use it. www.sta-bil.com. Works for me! -Dave-
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