Strange fuel consumption (159 2.4 Diesel)
I have owned my 159 2.4 ti for a couple of months now and have noticed some strange fuel consumption antics - just wondering if anyone knows what is happening, not a problem I am just curious.
I do a lot of motorway miles, so tend to set the cruise to 60mph (100kph) and let it do its thing.
I watch the instant fuel consumption and turbo gage, which both vary as you go up and down hill, but occasionally and only for around 5 minutes maximum, the instant fuel consumption drops from 40ish mpg down to 25ish mpg and the turbo drops to zero, unless we hit a big hill.
Does anyone know what is happening? Is it clearing out the DPF perhaps? Nothing else really varies dramatically during the 5 minutes, then all of sudden we are back to normal again.