Very poor mpg at 21.5 mpg

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Very poor mpg at 21.5 mpg

C30 / S40 & V50 '04-'12 / C70 '06-'13 General Forum for the P1-platform C30 / S40 / V50 / C70 models

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Dec 15th, 2012, 22:33	#10
nbuuifx Senior Member Last Online: May 1st, 2015 23:01 Join Date: Dec 2011 Location: Staffs	Could be a whole host of things. I doubt different fuel/ fuel additive would have any effect. Does it feel like it is running OK? Have you checked properly how many miles you are doing for how many litres? Don't just rely on the onboard computer as it may have gone tits up. What is the service history like? Has it been serviced regularly? If so the fuel filter should have been done so shouldn't be a problem (you would notice a problem with it running before it gave bad mpg) I've always found mine to be low, but I do terrible journeys - all short and up and down hills, but I still get 35ish. Try and borrow aN OBDII reader or get the codes read at a garage, it may tell you straight off what is wrong.

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