lydanial Posted June 4, 2006 Report Posted June 4, 2006 took a long trip this weekend 130 miles up the motorway, average speed about 55,cruise control set to about 75 and could only get about 40 mpg avg.. is this about right?? (sorry 115 tdi ghia manual 6 speed) anyway of increasing this?? ok 1 more thing, what are these pd tuning boxes i read about all over,, and have seen on flea-bay!! Quote
NikpV Posted June 4, 2006 Report Posted June 4, 2006 With CC set at 75mph 40mpg is not unreasonable perhaps a bit low - I've an auto and would get about 37mpg at that speed you will get much better figures with the cc set to 55-60mph. We got a distinct improvement when we replaced out MAF (about 5mpg at 55mph speeds - slightly less at 75+). How many miles has your car done? There is some evidence that the MAF deteriorates by about 50K miles and will affect your mpg and acceleration. See the following links Maf sensor thread include maf in scheduled maintenance If you end up changing it have a look at the FAQ - click on faq in my signature for instructions Rather than stating your car etc whenever you ask a question/post why not put the details in your signature - click on signature in my sig line As to tuning boxes - less than convinced, I believe they give more bhp but at what cost to the engine - don't believe the increased mpg though - meware of either increasing your insurance due to modification or invalidating it if you dont tell them (in the case of an accident) Quote
lydanial Posted June 5, 2006 Author Report Posted June 5, 2006 can anyone give me some stats of a good running 115tdi manual? 0-60?50-70 in 5th/6th? something to compare my car to.. obviously this thing always feels like a slug to me as i only sold my impreza last week to get this bus! Quote
NikpV Posted June 5, 2006 Report Posted June 5, 2006 sorry I have an auto - how quick are you at changing gears :16: :16: :16: Try the maf disconnect test - no difference - get a new one, if it drives like a dog then wait for some figures - its always gonna drive like a dog compared to your imprezza but I wonder how that would be 7 up :lol: :) :)........crowded I bet :lol: Quote
lydanial Posted June 5, 2006 Author Report Posted June 5, 2006 LMFAO.. yep crowded... when i need to go fast now i just take out my bike but you should see me squeezing the kids onto that.. we look like the blue angels! Quote
NikpV Posted June 5, 2006 Report Posted June 5, 2006 LMFAO.. yep crowded... when i need to go fast now i just take out my bike but you should see me squeezing the kids onto that.. we look like the blue angels! :lol: :lol: :16: Quote
Guest tomo Posted June 5, 2006 Report Posted June 5, 2006 followed are kid home he was towing aboat at 60mph , for 155 miles clock showing 61mpg Quote
mumof4 Posted June 5, 2006 Report Posted June 5, 2006 we average around 50/53 mpg at 60/65mph. short journeys not so good!!!!75-85mph is about 37/43 mpg.(not that i go that fast of course after all, ive not been driving that long. :lol: ) Quote
Guest MATT jr Posted June 5, 2006 Report Posted June 5, 2006 the highest we have got so far was 42mpg (or was it 43?) not recently achieved that. although recently we did get 38mpg round town which i thought was good. MJR Quote
lydanial Posted June 5, 2006 Author Report Posted June 5, 2006 ok then... list of jobs this week... monday.. run car without maf to check that.tuesday/morning ...getting aircon regassed.tuesday/afternoon... possibly buying a new maf of having my mechanic friend check all the pipe work.wednesday.. getting interior valeted (why oh why do they put beige interior into a car that you fill will mucky little kids!thursday .. no jobs planned... until i find a new problem on mon/tues or wed!friday ..getting car remapped by angel tuning, remap and 165 bhp, thank you very much :-) Quote
sanjsanj Posted June 5, 2006 Report Posted June 5, 2006 ok then... list of jobs this week... monday.. run car without maf to check that.tuesday/morning ...getting aircon regassed.tuesday/afternoon... possibly buying a new maf of having my mechanic friend check all the pipe work.wednesday.. getting interior valeted (why oh why do they put beige interior into a car that you fill will mucky little kids!thursday .. no jobs planned... until i find a new problem on mon/tues or wed!friday ..getting car remapped by angel tuning, remap and 165 bhp, thank you very much :-) please please please can you let me know how much your MPG changes by, driving around town and on the motorway please? :lol: ALso, how much are you paying to get it remaped? Quote
seatkid Posted June 5, 2006 Report Posted June 5, 2006 took a long trip this weekend 130 miles up the motorway, average speed about 55,cruise control set to about 75 and could only get about 40 mpg avg.. is this about right??Probably, depends on road conditions (mainly hills) and wind stength and direction. I am not being frivolous.... at speeds above 70mph the large frontal area seems to endow the Shalaxy with the aerodynamics of a 3 bed semi-detached house....anyway of increasing this??Drive more slowly Avoid unecessary acceleration Develop an "economic" style of driving Plan ahead e.g. coast to junctions - sometimes though it is more economic to "engine brake" to junctions Switch off A/C - (this automatically happens after 3 years anyway :10: ) Don't hang on in lower gears - get up to your desired speed promptly (not dragster style though) Use low friction oil (PD engines have few options though) You could try BP ultimate or Shell Diesel extra though most will say the mpg benefits are vastly outweighed by the extra cost. Biodiesel does seems to work, but I don't think PD engines are "certified" to run on this. Drive 2 metres or less behind big trucks on the motorway (not recommended -_- ) ok 1 more thing, what are these pd tuning boxes i read about all over,, and have seen on flea-bay!!Smoke and mirrors.... Some swear by them, but they all have the following faults. 1. They break the emission control of the engine (smoke, NOx and particulates). 2. Because of this, the oil get sooted up far quicker reducing its service time, which is often ignored leading to higher engine wear. (would you buy a second car like that?) 3. they do not increase the mpg, quite the opposite. The "apparent" increase in mpg comes about by the fact the ECU still "thinks" it knows the fuelling rate, unaware the tuning box has messed it up and is chucking in barrels more diesel into the engine. 4. Strictly speaking, its illegal. (EU and UK law) 5. They invalidate your insurance unless you specifically declare it to them as a mod. 6. You would be breaking the law if you "hide" the fact that your car was modified in the case of an accident or when selling on without giving the honest history. 7. Plus it makes idiots drive like idiots on steroids. 8. The ones on Ebay cost the seller less than a Quote
lydanial Posted June 5, 2006 Author Report Posted June 5, 2006 ok then... list of jobs this week... monday.. run car without maf to check that.tuesday/morning ...getting aircon regassed.tuesday/afternoon... possibly buying a new maf of having my mechanic friend check all the pipe work.wednesday.. getting interior valeted (why oh why do they put beige interior into a car that you fill will mucky little kids!thursday .. no jobs planned... until i find a new problem on mon/tues or wed!friday ..getting car remapped by angel tuning, remap and 165 bhp, thank you very much :-) please please please can you let me know how much your MPG changes by, driving around town and on the motorway please? :10: ALso, how much are you paying to get it remaped? remap is Quote
NikpV Posted June 5, 2006 Report Posted June 5, 2006 Probably good idea to work out some timed 'courses' to do before an after to take away the subjective feeling :10: -_- Quote
zeplin43 Posted June 5, 2006 Report Posted June 5, 2006 Post some averages for cars with tiptronic gearbox so we can compare. Quote
jkspoff Posted June 5, 2006 Report Posted June 5, 2006 Around town we get 35-38 mpg, on a long steady run upto 50mpg, but depends on driving conditions, i.e. constant speeds and if AC is switched on. Warm weather with AC switched off is the most economical. We are impressed by the overall fuel economy of such a heavy car. Quote
MrT Posted June 5, 2006 Report Posted June 5, 2006 I find it hard to accept that a remap alone can give a 35% increase in power. Quote
carterc_ae Posted June 5, 2006 Report Posted June 5, 2006 Just got back from a 2500 mile European tour and was astonished at what can be achieved over there compared to our small, poor quality, overcrowded motorways. Obviously on a warmed up engine and on the autobahns, I got an average 41-46mpg at close to 100mph in Germany. The super smooth, slightly downhill sections of Swiss motorways (with all the tunnels through the hills & mountains) with speed limits of about 60mph got me an incredible 60.1 mpg. These figures are not instantaneous but averages over long sections of motorway, whenever possible with cruise control set to the posted speed limit. BTW, back in the UK I normally get low 30's for urban and mid 40's on a steady motorway cruise. Quote
seatkid Posted June 5, 2006 Report Posted June 5, 2006 Obviously on a warmed up engine and on the autobahns, I got an average 41-46mpg at close to 100mph in Germany. These figures are not instantaneous but averages over long sections of motorway, whenever possible with cruise control set to the posted speed limit. :10: ....file under "Urban Legends"......next to Dellboyt..... -_- Quote
NikpV Posted June 5, 2006 Report Posted June 5, 2006 Obviously on a warmed up engine and on the autobahns, I got an average 41-46mpg at close to 100mph in Germany. These figures are not instantaneous but averages over long sections of motorway, whenever possible with cruise control set to the posted speed limit. :10: ....file under "Urban Legends"......next to Dellboyt..... :D -_- :D :D wow I remember delboyt and his claims :D :D Quote
Guest Cepheus Posted June 5, 2006 Report Posted June 5, 2006 with AC switched off is the most economical. I tested this theory on the 280 mile round trip up to the Wirral this weekend. Did half the trip there with CC on and the rest with it switched off. Result was 0.1 mpg lower with CC on. Did the trip back the other way round and got exactly the same mpg whether it was on or off. (Averaged 35.2 mpg at average speed of 58 mph according to the trip computer) My CC will now stay on and make driving more comfortable in the wheeled greenhouse as it made no difference to the mpg! Quote
NikpV Posted June 5, 2006 Report Posted June 5, 2006 against all common sense I agree I've never found much difference and always run with aircon on anyway. In physics terms you must do work to pump heat against a temperature difference mechanically there must be almost as much work being done with the aircon off as whan its on - this must come down to engineering though Quote
carterc_ae Posted June 5, 2006 Report Posted June 5, 2006 Obviously on a warmed up engine and on the autobahns, I got an average 41-46mpg at close to 100mph in Germany. These figures are not instantaneous but averages over long sections of motorway, whenever possible with cruise control set to the posted speed limit. :10: ....file under "Urban Legends"......next to Dellboyt..... :D -_- :D :D wow I remember delboyt and his claims :D :D Make of this what you will. I have no intention to mislead anybody, and stand to gain nothing by doing so, therefore why would I exagerate? I am simply giving you some recently obtained comparitive figures. If the calculations of my trip computer are out, I have also included the indicated figures regulary obtained in the UK, which as you can see are not brilliant. I was also very surprised at the readouts, but then given the state of the roads I was on at the time (almost perfectly smooth & free flowing for hour after hour) and the longer distances you can cover without constantly reducing speed or stopping, this really is the case. BTW it is not an auto, but a 130PD 6 speed manual (I thought this was in my profile but it may not display). I had it serviced before the trip and ran the tyres at 43 PSI (17 inch rims with 225/45 tyres) as I had a heavier load than usual. Quote
raymac Posted June 5, 2006 Report Posted June 5, 2006 i have just been to penzance and averaged about 41mpg at about 80/85mph this of course involved a lot of stop starting as we were on the shitty poxy always bloody well being dug up M5 :10: so i am well impressed with that return and will be looking for a bit more return in july/august as i am off to france were the road system is magnifigue or bostin if in brum -_- Quote
Bigjeeze Posted June 5, 2006 Report Posted June 5, 2006 I know it's not scientific but I usually know when I will get better MPG by how many miles I do to the half way point on the fuel gauge. If I hammer it then I get around 280 miles to half way but if I take it carefully then I can get up to 400 Miles. I went from Bournemouth to Leicster today - with a few stop offs a total of 401 miles at an indicated speed of 70mph (the computer averaged this out at 58mph) and after a refill I had 45.8 Mpg. Got to go to bloody Brentwood tomorrow - another 350 mile sround trip. To Uxbridge on Wednesday - 200 miles total mileage for the week 950 miles - So I ain't going anywhere on Thursday & Friday!! :( Quote
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