GolfGTIforum.co.uk
Model specific boards => Golf mk4 => Topic started by: Tezmax on 01 March 2017, 07:11
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17:00hrs Travel to work 45m trip and hit 40+ at a steady 60-70mph. 06:00hrs Return home same speed, traffic etc and struggle to reach 35mpg. 55mins each way avg. :undecided:
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The temp might have had something to do with that
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Temp gauge reading ok?
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Yep, bang on 90 mark after 10mins. I`ve even tried keeping the rev`s at 2000rpm up until top gear to help the return home fuel consumption but didn`t make any difference. Very odd!
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I think Barry meant the outside air temperature might have affected it
You came home in the early hours after the car has stood in the cold; it will use more fuel in order to get the car up to temp :smiley:
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Possibly downhill to work - uphill on return? Slight gradients can make the diffeence.
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I can't get my 1.9 pd150 to do over 33-34mpg. Bearing in mind I only drive 5 to 10 minutes to work but god knows how people are getting 50+ I'd like to see what roads they drive on or if there on instant
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5 - 10 mins and the motor is just starting to warm up. My 1.9TDI easily returns high 50s on the 150 mile return trip to town.
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That's my thoughts lol people are getting mega high mpg on really long runs not normal every day driving. I took mine to reading today from Basingstoke to pick up a dab aerial for mine got it up to 52 at one point driving mega carefully
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I think Barry meant the outside air temperature might have affected it
You came home in the early hours after the car has stood in the cold; it will use more fuel in order to get the car up to temp :smiley:
This is what I was thinking :smiley:
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If you went to work at 70 mph with a tail wind of 30 mph, drag is equivalent to 40 mph. If the wind was the same going home your drag equivalent is 100 mph.
I can get up to 10 mpg difference on a windy day going 50 miles up and down the M3 (which is pretty much in line with the prevailing wind). On a still day it is about 2 mpg.
Dry roads vs rain + headlights is worth an easy 5-8 mpg.
Aircon. Not so much. I haven't been able to see aircon off/on in a diesel ever. In a petrol, not since the first generation of aircon equipped cars in the UK (and back then it could rob 10 mpg).
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Interesting you should bring up the aircon stuff. I've checked on my 1.9 a couple of times...motorway speed, flat road on a fairly warm day (around 40 degrees) and she's drinking 4.1 l/100...turn off the a/c and reading drops back to 4.0, so it makes very little difference. Headlights must be lit at all times, so they are no factor for me.