What causes MPG to decline over time?

gizlaroc

Well, look at the temperture reading on your dash, make sure it gets to 90ºc and stays there. Haha


That would be my first port of call.

I would do that now anyway. 90ºc after no more than 10 miles and then sit there rock solid, in traffic, up hills, hooning it etc. etc.

imightbewrong

I missed this one amongst the other items.  Yes it goes to 90 degrees fast and stays there dead on.  Always has before, during and since the problem.

imightbewrong

Our local guy is good, and also happens to own a van the same as ours.  He has got us through a lot of issues/codes over the years.

Aerojon

cars with dpf's need a good run(Italian tune up) to get the dpf nice and hot for it to regenerate..

IronGiant

My Skoda has done 163K and is still, as far as I can tell, on it's original DPF.  Probably helped by the original owner averaging 23K a year   It also has a DPF warning light which, if I read the manual right, means: please take me on a long run (in Sports mode? ) to regenerate.

imightbewrong

Ours has that also 'DPF - READ MANUAL!' or something.  I suspect part of our issue is it is our only car and taking four children on half a dozen local activity drops every week can't be good for something that needs decent runs.

mjn

DPFs have a limited life span. They will fill with ash and soot eventually. I got 162k miles out of mine before it needed a clean. I do regular long journeys on the motorway and this no doubt extended its life, but it won’t last forever.

outoftheknow

                                                Toyota DPF Class Action | Bannister Law                                                                                                        1 August 2019 BANNISTER LAW CLASS ACTIONS FILES CLASS ACTION AGAINST TOYOTA AUSTRALIA   Register your interest in the class action by clicking on this link. If you would like more information regarding the class action please email: [email protected] Bannister Law Class...                                                                                                                                                                                                                                                                                                                bannisterlaw.com.au                                                                               
This I gather is being extended to other vehicles apparently. Its under consumer law as not fit for purpose. Expensive SUVs so far.....