It's unlikely that your car is more economical at 85 than at 60, as it takes 85% more power to maintain that speed. If you have unusual gearing or a rather particular engine then it's possible, but very rare I'd imagine.About 18-20 mpg combined generally.
Sorry to hijack the thread a little, but since its all about fuel consumption, is it right that my car is more economical at 85mph than at 60mph? Obviously I would never go that speed on the motorway, but I have very reliable information that says my car is more economical at that speed and I wonder how it could be so. I'd always thought somewhere near 60mph was optimum for fuel consumption.
Are you coasting behind lorries, I never used to get that much
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About 18-20 mpg combined generally.
Sorry to hijack the thread a little, but since its all about fuel consumption, is it right that my car is more economical at 85mph than at 60mph? Obviously I would never go that speed on the motorway, but I have very reliable information that says my car is more economical at that speed and I wonder how it could be so. I'd always thought somewhere near 60mph was optimum for fuel consumption.
About 18-20 mpg combined generally.
Sorry to hijack the thread a little, but since its all about fuel consumption, is it right that my car is more economical at 85mph than at 60mph? Obviously I would never go that speed on the motorway, but I have very reliable information that says my car is more economical at that speed and I wonder how it could be so. I'd always thought somewhere near 60mph was optimum for fuel consumption.
I also never realised just how much effect small inclines had on fuel economyI mean I could feel it in the 306 becuase that had naff all power but with the cruise set on the Octy the difference in one direction of the dual carriageway compared to the other can be massive over say a several mile stretch.
Imagine trying to push it up the hill yourself verses down the hill!![]()
Its possible that it might be using 4th at 60mph, 5th would be almost labouring the engine, when you come to a hill in 5th at 60 the engine might struggle and certainly wont be running optimally anyway, so either way it wont be superb for economy.
PMKeates said:It's unlikely that your car is more economical at 85 than at 60, as it takes 85% more power to maintain that speed. If you have unusual gearing or a rather particular engine then it's possible, but very rare I'd imagine.