James wrote:How long does it take for fuel in a car fuel tank to stagnate / weaken?
I use 99 Octane fuel and sometimes the car is left in a the garage for a few days and not used. I wondered what length of time or inactivity would be needed to render the fuel not as potent, and perhaps lack some performance when used again...
hardboiled wrote:I've yet to drive any car that goes into limp home mode just because it's had normal unleaded put it in. I would perhaps expect something like that on a 500bhp custom build turbo engine (Skyline/Cosworth maybe) but not on an OEM car.
In my car (non-turbo but 100bhp /litre) I can't really tell what fuel's been put in but I tend to use Optimax anyway. On my motorbike I reckon I can tell when it's got 98 octane in but that's probably psychological as I know what's just been put in it.
kwakba wrote:The only car I've ever known to show a preferance to fuels was my Alfa 75 2.0TS
7db wrote:Double blind test. The power of marketing is strong in this young Jedi.
Gareth wrote:kwakba wrote:The only car I've ever known to show a preferance to fuels was my Alfa 75 2.0TS
How much difference did you observe? When we had 2.0's I don't think we could detect any significant difference despite driving them enthusiastically. With our 3.0 there appears to be a slight improvement in performance with higher octane petrol, but we fill with standard most of the time, mainly using the more expensive when we know our friends are likely to be driving it.
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