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S60 & V60 '18> / XC60 '17> / S90 & V90 '16> / XC90 '15> General Forum for the SPA-platform 60- and 90-series models |
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V90 D4 MPG ImprovementViews : 5815 Replies : 60Users Viewing This Thread : |
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Jun 6th, 2019, 09:36 | #21 |
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My communte has increased from c23mpg to c26mpg
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Jun 6th, 2019, 10:10 | #22 | |
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Seriously though, if you used the A34, unless you were travelling late at night, there is no way you could do 75+. Too many lorries, and trying to overtake each other.
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Jun 6th, 2019, 10:51 | #23 | |
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Quote:
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MY 2023 V90 T6 Recharge |
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Jun 6th, 2019, 10:53 | #24 |
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A34 was fine both ways, weekday afternoon outside 4-7 rush. Rarely went under 70. M6 had some slow traffic northbound around J14 but other than that 75-80 all the way, roadworks and 50 limit around Oxford excluded.
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Jun 6th, 2019, 21:50 | #25 | |
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Engine braking
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Your statement above is correct for the BMW M47 2 litre engine and the Honda 2.2 diesel, but not so for the 1969cc Volvo D4. On the over-run say in 4th gear the engine never runs below 1000 revs and therefore engine braking is reduced often resulting in having to use the brakes when in other diesel cars the engine brake would have been sufficient. If the clutch is disengaged at this point the revs drop to idle about 850 revs. I asked "Clan" about this and he replied that it was done deliberately to protect the dual mass flywheel from drivers who use too few revs and causing transmission judder. Personally I would prefer the old system and drive in sympathy with the car. Cheers, Pete. |
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Jun 6th, 2019, 23:41 | #26 | |
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In reality your mpg is not that unrealistic and will get better as the engine & drivetrain loosens up towards the 10,000 mile mark. Remember you have a pretty large car powered by a 2L engine as well.
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Jun 7th, 2019, 00:10 | #27 |
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Happened to look today and mine's showing 46.8 over the last 2000 miles (V90 D4)
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Jun 7th, 2019, 02:52 | #28 | |
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Quote:
If yours is a manual car, the same applies but it will have a dual mass flywheel which is there specifically to prevent shock damage to the transmission, not the other way about. Judder is caused by the engine being stressed and unbalanced under load at below its working range, which is why so many cars now have an idiot-guide to warn drivers to change down under 1500rpm in any gear while under even a slight load.
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Jun 7th, 2019, 02:56 | #29 |
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...and you’re driving what, exactly...?!
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Jun 7th, 2019, 07:54 | #30 | |
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Quote:
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