low MPG

[Ian C]

I have just bought a 2008 ALphard 3litre and have calculated the fuel consumption to be 15.5 mpg.

 

Is there any advise as to what could be causing the low reading .  I took to a garage who changed the spark plugs and tested the emissions and  which are in the acceptable ranges.

 

Ian C

 

 

[MonsterS]

full service?

Did you put a full tank of premium fuel in instead of standard?

Are you town driving?

 

I get around town between 15 - 20 mpg depending on how i drive.

on motorways i get between 20 - 30 mpg.

[kendo]

Make sure the gear lever is in D and not 4 otherwise the MPG will plummit.  

[Alphard Club]

As Kendo suggests, this is one of the most common causes of high MPG

 

Check that first

 

Consider LPG conversion, we reduced our MPG by 40%.  We had a stag system fitted by Profess Autogas

[Ian C]

Thanks for the replies.  I have been using Regular fuel and  definitely in D not 4  gear setting.     I have had it in to a garage who have put in new spark plugs and done a road test attached to the ECU which has reported that the consumption is averaging 24.8 mpg????  The other tests done on the engine have readings in the spec ranges , so I am told.  No issues have been flagged from all this testing.   

[MonsterS]

Worth bunging in a full tank of premium and going on a nice long road trip. 

 

I did that and noticed my fuel consumption went up. since then i put a full tank of premium in every 20 -30 fill ups.