I6 Fuel Economy...

daz_ · 12-09-2007, 12:30 AM

So I know its all been asked and said before

I'm doing 90% highway kays and about the best I can manage over a few hundred km's is about 11L/100 this seems too high to me... I6 Auto Ute

Things to check?

Oxy Sensor
Cat

Anything else?

What will improve economy? Free up the intake?

I don't want to spend stupid money on this endeavor but it really doesn't feel like its running as freely as it should which is giving me the :togo:

JC · 12-09-2007, 02:12 AM

That's about right. Anywhere from 9 to 11 on the highway is normal - anything lower than 9 is just freaky, and anything above 11 is a bit rich, but not too bad. Over 12 is worth looking at.

If it's struggling at all through the rev range, prime suspect would be the cat.

daz_ · 12-09-2007, 11:09 AM

Well if you put the foot down it goes...

But just sorta seems to struggle to me unless you put the foot down

9 to 11 is normal? ! Yet they claim 8L/100?

Dauphin · 12-09-2007, 02:34 PM

By 90% highways kays to you mean on a 100 km/h freeway?

I get 7 and 8 all the time according to my trip computer on such roads. AU II VCT 6.

Are you using a real world calculation method?

daz_ · 12-09-2007, 07:59 PM

I drive 28km to work start car drive 1minute to freeway drive down freeway for 10mins stop at 2 sets of lights then do 80/100 the rest of the way no stops do have to slow a few times for roundabouts though

I'm counting those 2 stops at traffic lights and starting the car up from cold as 10%

I realize starting the car up and it will use more fuel while its warming up etc... But i think 90% is a fair figure more than fair infact...

The real world method I'm using it to fill the tank all the way to the brim and drive for a few hundred km and then fill the tank to the brim again to get a pretty exact I think method of measuring the fuel used...

After this tank I'll load up the diag screen again and see what it does use on the highway

mik · 12-09-2007, 09:10 PM

fluctuating speeds will kill your economy every time.

Crash Lander · 12-09-2007, 09:39 PM

My DTE and distance travelled never total less than 730 combined. Often they total 800-880 combined. This is true, all the way down to the red fuel light coming on, and is consistent from one tank to the next.
I don't drive like a grandpa, and it does get a good kick in the guts from time to time.
My trip to work is from Portarlington Vic to Geelong Vic, which is about 45km (guessing) with 75% of it being 100km/h limits.

HLC · 13-09-2007, 08:21 AM

i wish i got your economy guys lol

shirt trips to uni FTL

Dauphin · 13-09-2007, 08:34 AM

If you do an amount of driving at between 80 - 89 km/h then that might explain it.

In my car, I consider this the bad zone for fuel economy because the engine's doing 1,900 - 2,000 revs in 4th gear before lockup at 90 (and resulting lower revs). I think it's because of my hi-stall torque converter but I don't remember if it was the same before when it had the factory one.

daz_ · 13-09-2007, 11:14 AM

The VY I used to have doing similar trips to this would do 9L/100 give or take, you could see a big difference doing a trip like this in the fuel economy

Yet I'm babying the thing around driving like an absolute grandpa and it gives back 11L/100 ? I thought the Falcon's were supposed to be better on fuel

If I even accelerate to 60 too quick I can feel the fuel gauge going down

Creampuff · 13-09-2007, 05:42 PM

I know I am in the wrong car bracket but, I drive hard and get 11.4 in city and 8.8 on highway.....just stirring the pot.

InfernoSR · 13-09-2007, 10:25 PM

Approx 30Ltrs of LPG and Approx 30Ltrs of ULP from Batemans bay to Bathurst in 6hours... thats with plenty of breaks and some rather heavy footed spots :P That is also driving through the Blue Mountains and towards Canberra. I only have an AU Forte' I 4ltr Auto Duel Fuel and NO Cruise Control.

daz_ · 14-09-2007, 10:32 AM

Quote:

Originally Posted by Creampuff

I know I am in the wrong car bracket but, I drive hard and get 11.4 in city and 8.8 on highway.....just stirring the pot.

Yeap that is exactly what I'd expect! I managed to quite easily get it over 13/100 the other week driving around mainly locally and it wasn't even particularly up it... Isn't the BA supposed to be worse on fuel than the AU?

Dark Horse · 14-09-2007, 11:03 AM

I might suggest you reset your ECU by disconnecting the battery terminals for at least 45 minutes (or something you can do overnight). See how that goes as well.

sly · 14-09-2007, 12:01 PM

Quote:

Originally Posted by Dauphin

If you do an amount of driving at between 80 - 89 km/h then that might explain it.

In my car, I consider this the bad zone for fuel economy because the engine's doing 1,900 - 2,000 revs in 4th gear before lockup at 90 (and resulting lower revs). I think it's because of my hi-stall torque converter but I don't remember if it was the same before when it had the factory one.

My bog stock tranny and converter can lock up below 80. The lock-up point seems to vary depending on throttle position too. Get up it & the converter stays unlocked longer.

Creampuff · 14-09-2007, 05:55 PM

Daz, I don't know which is meant to have better economy, this is my facts. Anyway, at least we all drive the right cars....FORD

daz_ · 14-09-2007, 09:35 PM

Hahaha!