iborguk Posted April 21, 2023 Report Share Posted April 21, 2023 Just now, GTSMarky said: I agree, but if we do use them as a daily it helps that the fuel consumption can be OK. A very valid point. 1 Quote Link to comment Share on other sites More sharing options...
Ringmaster999 Posted April 21, 2023 Report Share Posted April 21, 2023 1 hour ago, iborguk said: A very valid point. Mines not a daily but travelling down to the Euro Tunnel last year I managed my best ever fuel efficiency. So there not bad when driven economical 😳😂 Quote Link to comment Share on other sites More sharing options...
iborguk Posted April 21, 2023 Report Share Posted April 21, 2023 18 minutes ago, Ringmaster999 said: Mines not a daily but travelling down to the Euro Tunnel last year I managed my best ever fuel efficiency. So there not bad when driven economical 😳😂 Down hill 👍 1 Quote Link to comment Share on other sites More sharing options...
Menoporsche Posted April 21, 2023 Report Share Posted April 21, 2023 .... with engine off... 1 Quote Link to comment Share on other sites More sharing options...
moospeed Posted April 21, 2023 Report Share Posted April 21, 2023 8 hours ago, Menoporsche said: .... with engine off... That’s coasting mood for ya, I think that’s great. I do it manually in the wife’s car now, notch it into neutral if I’m going into town (downhill all the way). Economy isn’t as important to some with a sports car of course, but it is a definite benefit when you can cruise from Kent to Wales at 40+ mpg and then aim for sub 20mpg on the interesting roads. No point wasting money on the motorway which is what most cars I’ve had would do. At last year’s Dragons Throat run it saved me the cost of the airbnb and evening meal. That’s very worthwhile. 1 Quote Link to comment Share on other sites More sharing options...
½cwt Posted April 22, 2023 Report Share Posted April 22, 2023 6 hours ago, moospeed said: That’s coasting mood for ya, I think that’s great. I do it manually in the wife’s car now, notch it into neutral if I’m going into town (downhill all the way). Economy isn’t as important to some with a sports car of course, but it is a definite benefit when you can cruise from Kent to Wales at 40+ mpg and then aim for sub 20mpg on the interesting roads. No point wasting money on the motorway which is what most cars I’ve had would do. At last year’s Dragons Throat run it saved me the cost of the airbnb and evening meal. That’s very worthwhile. Notching neutral still leaves the engine running with idle fuel. If you 'coast' with transmission engaged down a hill the fuel supply is off completely on most fuel injected cars. Also being out of gear is not good practice. 1 Quote Link to comment Share on other sites More sharing options...
moospeed Posted April 22, 2023 Report Share Posted April 22, 2023 2 hours ago, ½cwt said: Notching neutral still leaves the engine running with idle fuel. If you 'coast' with transmission engaged down a hill the fuel supply is off completely on most fuel injected cars. Also being out of gear is not good practice. Hmmm that’s interesting, so the fuel is entirely cut on coasting in gear (in a manual) - so I could be using more fuel on my economy drive. If that’s actually the case then why do Porsche do exactly that? There would be nothing to gain. Quote Link to comment Share on other sites More sharing options...
Codfanglers Posted April 22, 2023 Report Share Posted April 22, 2023 2 hours ago, moospeed said: Hmmm that’s interesting, so the fuel is entirely cut on coasting in gear (in a manual) - so I could be using more fuel on my economy drive. If that’s actually the case then why do Porsche do exactly that? There would be nothing to gain. All to do with engine friction. Coasting in gear down an incline will slow the car down quicker due to engine braking, then the amount of extra fuel to maintain or get it back up to speed would be more than fuelling tick-over whilst coasting. Like stop/start, it could possibly have saved enough fuel on test to drop the vehicle's CO2 emissions, tax band, and make the fictitious economy figures look better. I find the mode unnerving in autos, and if you do it in a manual you could be considered not to be in full control of the vehicle. Quote Link to comment Share on other sites More sharing options...
moospeed Posted April 22, 2023 Report Share Posted April 22, 2023 4 hours ago, Codfanglers said: All to do with engine friction. Coasting in gear down an incline will slow the car down quicker due to engine braking, then the amount of extra fuel to maintain or get it back up to speed would be more than fuelling tick-over whilst coasting. Like stop/start, it could possibly have saved enough fuel on test to drop the vehicle's CO2 emissions, tax band, and make the fictitious economy figures look better. I find the mode unnerving in autos, and if you do it in a manual you could be considered not to be in full control of the vehicle. “Leave me alone, I know what I’m doing” - Kimi Quote Link to comment Share on other sites More sharing options...
GTSMarky Posted April 24, 2023 Report Share Posted April 24, 2023 On 4/21/2023 at 1:37 PM, iborguk said: A very valid point. ..it happens very ocasionally! 1 Quote Link to comment Share on other sites More sharing options...
GTSMarky Posted April 24, 2023 Report Share Posted April 24, 2023 On 4/21/2023 at 3:23 PM, Ringmaster999 said: Mines not a daily but travelling down to the Euro Tunnel last year I managed my best ever fuel efficiency. So there not bad when driven economical 😳😂 Blimey! Quote Link to comment Share on other sites More sharing options...
½cwt Posted April 24, 2023 Report Share Posted April 24, 2023 13 hours ago, GTSMarky said: Blimey! I recall a similar moment of disbelief when I posted on IWOC that I got 36.6mpg out of a UK spec Impreza 2000 Turbo in the late 90s on a long motorway run. Quote Link to comment Share on other sites More sharing options...
alank Posted May 10, 2023 Report Share Posted May 10, 2023 Just got back from an 850 mile trip around north wales ( and it was sunny their whilst most of england had downpours) and was happy to see 40mpg at 70mph Quote Link to comment Share on other sites More sharing options...
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