Fuel Efficiency VERY HIGH!! HELP!

[Tasmaniak]

i get 20L/100km in my huge cammed VE Maloo LS3 with a 3k stall so id say you have a problem.

I'd say you're doing well! Lol

 

[stirringaxe]

Maybe try working through this list. Hope it helps

Yes check O2 sensors first.
New Air Cleaner Element (filter).
Replace the plugs if not already done.
Check tyre pressures are not too low - between 36-40 pounds.
Clean the throttle body & make sure the MAF is clear of rubbish & is clean.
Add some injector cleaner in with the next tank of fuel to clean the injectors.
Check how easy the wheels rotate. If they are hard to spin when jacked up check these two things
What are the brake pads like. If they are well worn & the pistons extended out a lot. They may possibly be dragging. Also make sure the hand brake is not over adjusted
When was the last engine oil change done ? Make sure fresh oil of correct viscosity is used.

Check to make sure aircon is not used too much while driving.
Keep windows up or open only very slightly.
Check & remove roof racks if fitted.
Consider removing rear large rear boot spoiler if fitted.
Smooth acceleration while driving will help. These things are very thirsty around town.

I find with city driving, if I get stuck at traffic lights a lot & held in long ques of cars the fuel consumption rockets up. Have noticed this in both V6 & V8 models I have owned.

That's what I can think of that's worth trying, good luck with it.

 

[Phantom]

Umm what about the type of petrol you use? E10 or Premium ULP?

 

[Shauno-81]

Umm what about the type of petrol you use? E10 or Premium ULP?

Hey buddy.. Yeah definitely got some issues there.. I'm using about 12.5L/100km on 98 in a 2006 Calais 6.0L which is brilliant in my opinion considering I boot it a bit, gets up to 14.5 when it wants to though, no matter what fuel your using it shouldn't be anywhere near 20L/100. I'd say your old girls a closet lead foot

 

[corhijasna]

oxygen sensors or coil packs would most likely be the problem or a combination of both

 

[Big-Al]

i get 20L/100km in my huge cammed VE Maloo LS3 with a 3k stall so id say you have a problem.

You must drive it like an old lady ahahahahahahaha

 

[Big-Al]

Hey, its my mums car and she doesn't thrash it or anything but the fuel efficiency has been like this since we bought the car 1 month ago. 19L/100km seemed like it was too much for normally driven v6 engine. This is why it has come to my concern

Take it back to the dealer and get them to fix it. Can't sell something that doesn't work as advertised.