OmniCognateSnr wrote: ↑Tue Jul 27, 2021 3:07 pm
Tracky wrote: ↑Tue Jul 27, 2021 3:00 pm
OmniCognateSnr wrote: ↑Tue Jul 27, 2021 2:30 pm
the cost is the same, its more a cashflow issue
At the moment I guess its a little over £100 for a 75 litre tank full.
My mini would take about 2 months to drink that much. Oh well, back to spending stupid money on cars.
More if you proper fuel
Right, whole different conversation there. I know this is VERY off topic but I have often wondered what the benefits of “proper” fuel are ( the benefits to the petrochemical companies are obvious ). I always used “the good stuff” in my Aston but what difference does it really make?
I would assume most modern cars would adapt engine settings based on the fuel being used. So if you use higher octane does you cars brain adjust how it runs so that it always runs the same, irrespective of the octane rating of the fuel? i.e. does it maintain a mean average irrespective of what fuel you use ( unless you accidentally put Diesel in). American petrol is garbage, but I doubt Porsche changes the engine mapping to account for that. I do, however, expect the EMU automatically accommodates for it.
Often wondered this, so any technical chaps or chapesses out there I’d be interested to hear from you.
There's been extensive debate here on this over the years with the usual nonsense spouted by fans of internet myth etc. And as you allude, many claim it's just profiteering and/or marketing hype. But the fact remains that the premium fuels are higher octane and modern high performance engines are capable of making use of this while also adapting to lower octane fuel when necessary. Primarily this is done by advancing or retarding the ignition to the point where preignition or 'pinking' is prevented. My 911 clearly demonstrated this in the Alps once when I was forced to use 95 octane. On steep, fast full throttle climbs the power noticeably dropped and sounded a bit like it was hitting the rev limiter, which it wasn't. The next fill of 98, and 100 when I could get it, restored normal service.
Premium fuels also contain more additives for smoother running, better starting and fuel system maintenance, among other things. Additives are expensive and this is where the supermarkets trim the costs. The fuel still meets British Standards, but isn't the same as the premium stuff. But you'll still get people asserting that "it all comes from the same place" and other falsehoods from someone they met in the pub.
I used to use Shell V Power but now use Esso Supreme as, in most parts of the country, it doesn't contain ethanol.