...and then leave it off: I'm still getting the same or better fuel economy with 'eco off'...to fully disengage,, turn the switch off Jonners
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To be fair you might well see a slight power increase with 97/98/99 RON fuel versus 95 (or even 91/92 in somewhere like Romania), as the knock sensor will be able to advance the ignition a bit more with higher octane fuel and this might be noticeable on a turbocharged engine (much less so, if at all, on a normally aspirated engine) - whether the slight power increase (probably a true 5-8%) justifies the additional fuel cost is a personal thing.The photo could be too large to upload to the forum, Compress the photo then try again.
You are running on a false economy, You are using the Eco button to save fuel but you are unnecessary filling your tank with the expensive fuel rather than standard fuel which is the correct grade for these cars.
I know nothing about the fuel les, but agreed on the eco, if you want to take it easy it's got to be on, without it it's off the mark like something on off a stick I find... Especially when your queuing in traffic :-oThanks for the advice and comments. The file was too large but I won't bother trying to rectify it as it would prove I was lying...I only got 69.7 MPG rather than the 69.9 I thought I had.
I don't regard using Shell V Power as a false economy, I'm using it because of the additives. It may be nonsense but I'm sticking with it until I'm convinced otherwise. Good enough for Honest John, good enough for me. Eco mode is a personal thing. It suits me but I appreciate it wouldn't everyone. Equally, not everyone can poodle around at 50 MPH the way I can these days, and I have proven to myself that 50 is the sweet spot in my car - anything over that increases consumption a fair bit. I guess I added about 30 - 40 minutes on my return trip from Portsmouth to Northampton, but the best thing about being an old bugger is...who cares?