Miles per gallon
- Thread starter beeRS
- Start date
944 man
Active member
Coming back to the fold after years away (last cars were a 250 and a 968), I was pleasantly surprised to get over 35mpg across Europe in a late series one car. This 2.7l gave me a nasty surprise on my first journey back from Edinburgh on the A1 though - not much over 20mpg! I believe that it was due to my being used to a much lightened and very nimble car, but I cant be sure.
pauljmcnulty
Active member
If you mean a full tank, check your fuel lines aren't leaking. Calculate the actual MPG though, as the guage is so hoplessly inaccurate that you might have only used three-quarters of a tank. A lux should hover around the 30 MPG mark in general, careful driving. It plummets when pushing hard, high motorway speeds or heavy traffic, of course. I used to get to around 360 miles in VJ before I worried about filling up, and often 400 and never ran out. I don't know whether the tanks are the same size in a 2.7?
My S2 driven conservatively on moderate journeys can provide an average of 28-29mpg across a tank - that's getting to 400 miles between fill-ups on a regular basis. In town, I can see 18mpg across a tank (which is what it worked out at last time I filled it.) Record best was over 33, which is about 430 on a tank. Ironically while giving it serious hoof across Scotland, on 95ron fuel. The loss in economy is in braking and accelerating, and sustained high speeds avoid this ... (something the idiots who run road policy should realise when they put in 'traffic calming measures' and multiple speed bumps. They increase fuel consumption and increase CO2 output - if anyone is stupid enough to think that this is bad for the environment. Oh, it also bring in more fuel revenue. Perhaps that's why they do it ... ) Higher octane fuel returns a better MPG that more than pays for the more expensive fuel. It's worth the investment in my book. Also summer motoring improves MPG by around 10% as the air is thinner (warmer) and pushing a car through it is easier. (Should anyone wonder then yes, I have monitored every drop of fuel that I have ever put into my S2. Sad? Very .... [
] * ) Oli. * - I shall await someone telling me that I have used the wrong smiley!
] * ) Oli. * - I shall await someone telling me that I have used the wrong smiley!
MRGT
New member
Interestingly I find my 'S' gives better mpg on tesco's 95 Ron that it does on their 99Ron,. Either way I have never cracked 30 mpg, and this is on a steady 33 mile each way commute to work on a quiet duel carriage way averaging 65-70mph. For info my porsche handbook states 34.7 mpg at a steady 75 mph ! and an incredible 42.9 mpg at 56 mph . I think Porsche may have been optimistic with their readings ! []
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Outrun944
New member
I'm wondering this ... in my manual for my 1984 LUX it states (from memory as I don't have it to hand here) "only use 98 RON petrol" What are peoples thoughts on this? Is there any issue or worry about using standard 95 RON? Is there any real benefit in performance and economy when using above 95 RON? (incidentally I've got quite a way over 300 miles on my 2.5L tank) Cheers!
morris944s2john
New member
I used to get 24-25mpg in a mixture of town driving and driving to work (some stop start) at 40-50mph. Long journey, regularly 30-32mpg. Best I ever got was due to wheel wobble (tracking out), I kept my S2 to 70mph and got an unbelieveable 36mpg!!! But then again I am not a particularly fast/ aggressive driver.
Early cars should run on 98 - sticker inside of filler flap says so too - mine is certainly smoother with sharper pick up with it. Mever checked mpg - didnt buy it to care about that! Mike
david924s
New member
I get around 25-26 mpg from my 944S2 in normal mixed urban I suppose they would call it and well over 30 on a long run. When I had a 924S I got around 26-18mpg mixed and around 35 on a long run. I generally use 95 octane as I have not noticed any improvements for the extra cost of 99 octane even after a number of tanks full and I must agree that the fuel gauge is notoriously unreliable although having said that mine goes onto reserve and the light comes on with around 2 gallons left which is what it says in the handbook.
pauljmcnulty
Active member
That's low, but it's so hard to judge as we've no real clue as to the sort of journies you do, or how you drive. It's winter, which makes a slight difference, and as mentioned a good service will improve things. As will tyre pressures. All I can say is that my Lux very rarely went less than 30MPG on a tankful, if ever. That included a good mix of urban short runs, A-road blasts and motorway driving at a healthy cruising speed, probably as near to an average useage as you would get. I'm not heavy-footed, but it was always driven "enthusiastically", and often on runs would be in convoy with the Turbo boys, so I was always playing catch-up to an extent. The one really bad mileage I got was almost no miles to a full tank. That was the fuel line giving up, though. Worth checking.
andy watson
Moderator
I have just had my car serviced at OPC, they inform me that the MAF is not functioning correctly it is running at 3.5% CO and it should be 1% and this is causing the excessive fuel consumption, now I don't know much about this sort of thing, but could this also be your problem? Prehaps some of the more knowledge guys could comment? Regards Andy
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