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13th July 2014, 17:36 | #11 |
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There's no reason to be worried about anything. ........after all u get 44mpg.
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13th July 2014, 17:57 | #12 |
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13th July 2014, 18:02 | #13 |
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Have you run the on-board diagnostics temperature monitor? maybe it's not getting up to temp. Plenty of info on diesel thermostats and running temperature and relationship with mpg on the forum.
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13th July 2014, 18:03 | #14 |
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I wish my diesel delivered 44mpg.
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13th July 2014, 22:07 | #15 |
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13th July 2014, 22:15 | #16 |
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I did. Of course I did make a natural assumption that the car wasn't bowling down the road at 70mph when that reading was taken, I could be wrong...
87 on the T4 with the car standing still is quite different to rolling down the motorway with a 70mph breeze through the radiator. Unless the fan is running the radiator will do very little to cool a stationary vehicle unless it's angled to let some convection to take place. My question was aimed at evaluating the performance of the thermostat. A premature opening thermostat or one stuck open will have little to no cooling effect unless the car is moving.
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13th July 2014, 22:34 | #17 |
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There could be many contributory factors as to why your not getting same MPG will list a few take your pick
wear in the sensors (as they get older their performance dan deteriorate ) Different fuel (even from same garage it can be different from time to time depends on where its refined) Weather conditions (head winds placing extra drag on car or very hot air can have detrimental affect on combustion efficiency) Driving conditions (idiots pulling out in front of you or having to accelerate more often even gently will use more fuel than coasting or constant speed) Brakes binding slightly (a sticky piston can play havoc with your MPG) Aircon issues if used Extra electrical load (it all has a detrimental affect) Dirty car (if airliners quote it as an issue why not us) lol I'm sure others could add to this list of things that may have had a cumulative affect Doc :cool:
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13th July 2014, 22:54 | #18 |
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I blame **** modern derv. We had 3 diesel 75s in the family and all achieved close on 50mpg on a run. Since the advent of "cleaner" diesel I get about the same as you. The only way I can achieve 47-48 mpg is to keep the speed down to 60-65 mph and that is not usually an option I care to choose.
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13th July 2014, 22:55 | #19 | |
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Quote:
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