2007 Boxster 987 3.4s manual - poor fuel consumption.
Discussion
Doesn't sound completely terrible, but it does seem a little on the low side:
My 987.1 2007 3.4S normally does around 25-26 mpg on the motorway on cruise (with the roof up), obviously quite a bit worse around town or being driven hard. A 2005 987.1 3.2S I know well does a little better. My old 2003 986.2 3.2S would do 31-32 on motorways on cruise with the roof up which I think is just due to smaller wheels / tyres (18s vs 19s), more camber, slightly less toe, lower rolling resistance tyres (Michelin PS2 vs Falkens) and a slightly smaller shape and lower drag coef.
Assume you have checked the tyre pressures and the tyres aren't scrubbing and wearing hard on any edge / corner of the car?
My 987.1 2007 3.4S normally does around 25-26 mpg on the motorway on cruise (with the roof up), obviously quite a bit worse around town or being driven hard. A 2005 987.1 3.2S I know well does a little better. My old 2003 986.2 3.2S would do 31-32 on motorways on cruise with the roof up which I think is just due to smaller wheels / tyres (18s vs 19s), more camber, slightly less toe, lower rolling resistance tyres (Michelin PS2 vs Falkens) and a slightly smaller shape and lower drag coef.
Assume you have checked the tyre pressures and the tyres aren't scrubbing and wearing hard on any edge / corner of the car?
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