Steve Brookes
Moderator
I frequently get mine down to about 8 mpg. [
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]964 as a daily driver?
- Thread starter Joss Walker
- Start date
I get between 24 & 26 MPG on my battery recharge runs...[]
I managed over 31 MPG on a recent run down to Eastern France, 26.5MPG down to Le Mans last week, but that included quite a lot of full throttle between roundabouts hooning on the N road to Gace...[] as well as traffic jamming in Le Mans itself.
The return journey was mostly on the Autoroute at constant speed but I haven't filled up yet. I expecting not far off 30MPG though.
]I managed over 31 MPG on a recent run down to Eastern France, 26.5MPG down to Le Mans last week, but that included quite a lot of full throttle between roundabouts hooning on the N road to Gace...[
] as well as traffic jamming in Le Mans itself.The return journey was mostly on the Autoroute at constant speed but I haven't filled up yet. I expecting not far off 30MPG though.
Steve Brookes
Moderator
That's for the conti road tyres.....the toyos only managed about a third of that [
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MarkK
Active member
On the C4 i reckon the rears last us 6k-8k miles???(sorry cant be more accurate)Thats with my wife going to school in it,shopping etc,we use ours in winter, maybe with the slip it wears them down quickly?Also we find the C4 eats fronts[&:]$$
My record for wearing tyres out is 1 day at Anglesey TR888s,very abrasive circuit,it was hot aswell and i was enjoying it a bit to much (in my ex old blue 944 turbo) []
My record for wearing tyres out is 1 day at Anglesey TR888s,very abrasive circuit,it was hot aswell and i was enjoying it a bit to much (in my ex old blue 944 turbo) [
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Steve Brookes
Moderator
Hope Joss is enjoying all this feedback? Not that we've heard anything from him since he started this topic. [&:]
You must be REALLY trying, Steve
ORIGINAL: Amanda964
Absolutely certain on the mpg and absolutely certain that I do get more mileage for the gallon from the 964 than the Boxster! I've also done geeky notebook accounting like Gaz (K90) - I have to...I'm still jobless and with very little money I have to plan my petrol and mileage costs in the 911 almost to the penny!!!
Maybe I just have a very smooth driving technique [
Hi Amanda,
I'll chime in here and mostly agree with you.
I get 35mpg on my 300 mile runs to Newcastle without having to be too careful or trundle along in the slow lane - if you catch my drift.
In normal usage going to work and back everyday (25 mile round trip in slow moving traffic), I probably get between 25 and 28mpg. I'm not quite geeky enough to write it all down [
] but I always reset my mileage to zero at each fill up (it's become a game I have with myself...don't ask...) and I never have to refuel with less than 300 miles gained from a tank. More like 400 miles if the first part is my motorway journey from oop north! In fact, my fuel consumption return is so predictable, that I used the above method to decide when to fill up during a couple of months when my fuel level sender failed - much to the amusement of my local specialist.Like all blokes, I reckon I'm a decent driver and I do have a fairly smooth driving style (no unecessary braking!) but I can't claim to be police class or Rospa and I still get the figures above.
Dominic.
Owner of '91 964 C2 - original with Design 90s and flag mirrors. No pimping...apart from a decat...
I tried 99 octane for a while and didn't notice any difference in fuel consumption. I think the difference, if there is any, is not noticeable above the natural variability you get from your driving style etc. I didn't really see any benefit in performance either to be honest - I think the engine management system just compensates - although my car wasn't in the best shape at the time so maybe I'll try again in future.
Regarding supermarket v BP/Shell - I use both interchangeably, whichever is most convenient. Can't tell the difference.
Re. the 30+mpg, some real figures from approx 3 weeks ago: 264 miles door to door, 3 hours 40 minutes, 8 gallons (36.5 litres) to fill her back up the next day. Not quite 35mpg but I did boot it a bit!
Dominic.
Oops, should have replied sooner Gaz...
Mine doesn't even have an O2 sensor! lol. Only found out when I took the car in to be fixed around Christmas time - techie tried to test it and found it was looped out.
During my recent crisis (car in shop for a month, techies not a scooby, which turned out to be a blocked injector), a lot of my electrical components were replaced; ignition units, coils, plugs, distributor caps and crank sensor. All of that improved the running and my fuel consumption if that helps. Although to be honest, I think that the engine managements attempts to cover for the blocked injector was probably the main reason for poor previous consumption (and also the reason my electrical components started giving up the ghost!).
In theory, however, a properly functioning o2 sensor could save you up to 10% if the old was knackered.
Let me know what happens. If its good, I might have an o2 refitted since my new decat pipe now has an orifice for one to go into.
Regards,
Dominic.
Mine doesn't even have an O2 sensor! lol. Only found out when I took the car in to be fixed around Christmas time - techie tried to test it and found it was looped out.
During my recent crisis (car in shop for a month, techies not a scooby, which turned out to be a blocked injector), a lot of my electrical components were replaced; ignition units, coils, plugs, distributor caps and crank sensor. All of that improved the running and my fuel consumption if that helps. Although to be honest, I think that the engine managements attempts to cover for the blocked injector was probably the main reason for poor previous consumption (and also the reason my electrical components started giving up the ghost!).
In theory, however, a properly functioning o2 sensor could save you up to 10% if the old was knackered.
Let me know what happens. If its good, I might have an o2 refitted since my new decat pipe now has an orifice for one to go into.
Regards,
Dominic.
Steve Brookes
Moderator
I don't like the sound of that O2 sensor. The original Bosch ones are £80 + VAT. The cheap knock off ones are usually a waste of money. Coils are not too bad a price at about £120 a pair but the HT leads will set you back something like £350!
BTW remember that a tiptronic is less fuel efficient than a manual. I would say that if you're averaging just above 20 mpg, that's pretty normal.
I just calculate the mpg manually: fill tank to the brim, drive until I've used a good chunk of it, re-fill and note the number of litres to fill back up to the brim, divide by number of miles driven between fills using conversion factor for UK gallons. Do this a few times and take an average.
In practice, I tend to drive roughly the same number of miles between fills; 300-320 (unless I'm measuring a specific journey), which is enough to take the fuel level down to below 1/4 but above red zone. So the amount of fuel I add is also fairly consistent and I can make a mental note without resorting to notebooks etc. Most of the time its just a look-see to check that it hasn't dropped off a cliff since the last fill up.
Regards,
Dominic.
p.s. mine is a manual; a tiptronic won't match it for MPG.
In practice, I tend to drive roughly the same number of miles between fills; 300-320 (unless I'm measuring a specific journey), which is enough to take the fuel level down to below 1/4 but above red zone. So the amount of fuel I add is also fairly consistent and I can make a mental note without resorting to notebooks etc. Most of the time its just a look-see to check that it hasn't dropped off a cliff since the last fill up.
Regards,
Dominic.
p.s. mine is a manual; a tiptronic won't match it for MPG.
ORIGINAL: K90
i think its becoming my mission in life to get 30 mpg from a tankful!!
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You need to get yourself into Europe, I can't see there is much opportunity in the UK as the roads are too busy and too many people dwardling in the outside lane.
All my big numbers come from transcontinental drives.
vitesse
Active member
Gaz,
There is a balance between capital spending on parts & labour & recouping the cost over the miles you do each year-cars normal efficient speed around 50mph-my 28.5 mpg reflects cruising at 85/90 mph & keeping the car in 5th gear all the time wherever possible.
By contrast, my BMW 530D SE Touring remapped to 250bhp-steptronic only does 31.6mpg on diesel kept in 5th with cruise control on similar journeys-yet you hear about similar cars apparently doing 44mpg-don't believe all you hear-what do you expect from a 3.6 litre air cooled flat 6 with 964 performance?[8|]
There is a balance between capital spending on parts & labour & recouping the cost over the miles you do each year-cars normal efficient speed around 50mph-my 28.5 mpg reflects cruising at 85/90 mph & keeping the car in 5th gear all the time wherever possible.
By contrast, my BMW 530D SE Touring remapped to 250bhp-steptronic only does 31.6mpg on diesel kept in 5th with cruise control on similar journeys-yet you hear about similar cars apparently doing 44mpg-don't believe all you hear-what do you expect from a 3.6 litre air cooled flat 6 with 964 performance?[8|]
We're not married...YET! [8D]......so it's PC Wickwar.
On the mpg topic, I will be able to put my 30 mpg to an 'official test' on the Cotswold Economy Drive in August.
Organised in conjunction with the International Rally Drivers Club - yes, I've done rallying in my time!! - the Economy Drive is a touring rally with a road book (tulip style) and includes estimating your mpg before the event. Petrol tanks are filled to maximum at the start of the rally, the cap sealed over so as to prevent tampering and then at the end of the event, all cars are topped back up with petrol (at owners expense!) by the scrutineers. There's a 1st, 2nd and 3rd prize for the competitors who estimate their petrol consumption the most accurately to 0.1 of a gallon.
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