Euro fuel consumption

[Sp00ny]

Your figures definantly seem high for a car with such low kms and subtle driving habits. I know the auto definantly does go through more fuel (I have compared them). I have an '05 Luxury; 97,000kms; Fuel Average Hybrid 8-9L/100Kms (City and Some HWY), and filled up with 50 litres (bit before fuel light) and have already got around 410 kms and needle is still just above half. I drive conservatively, very rarely go past 4,000rpm. I use BP Ultimate.

For such high figures I would be looking at a few things. If your keen to do some simple DIY testing, it would be wise to look at things that may affect your fuel ratio but not enough to trigger an ECU Trouble Code.

Get yourself a can of electrical Contact Cleaner.

- Clean MAP Sensor (Located on the front of the Intake Manifold)
- Inspect Oxy Sensors (Professionally Test them)
- Inspect Air Filter Element
- Get your ECU read at Honda or reputable mechanic if you haven't already.

I would be looking at a possible faulty/contaminated MAP/MAF sensor first and go from there.

Also Inspect your spark plugs and report back the colour.

White: Lean, High Temperatures (Incorrect Plugs(need a colder plug)/Lean AFM)
Grey/Light Brown: Stoich (Running Well most likely)
Dark Brown/Black: Rich (Rich AFM Issue)
Black/Soot/Fouled: Running Very Rich or Burning Oil.

If you live in Melbourne, I'm more than happy to help out.

Remember: The key to fuel efficiency, the majority of time is how you drive. Shift at optimal points (difficult in an auto though) (mine are around 3-3.5k usable torque starts at around 2600rpm) and low throttle. High RPM or Anything over one quarter to a half throttle will unnecessarily use more fuel.

[aaronng]

Don't bother with Shell. I had my worst ever figures with V-Power. They use ethanol to get the mixture to 98 RON. I average 7.5-8.5L/100kms on vortex and have been for the last 9 months. V-Power I topped out on 10L/100kms. With V-Power your better off using Shell's E10. Talking to my mate who deals with the refineries through his work, Vortex is the best, followed by Mobil 8000 then BP Ultimate.

Rob

Shell Vpower does not use ethanol to reach 98 RON.
It is Shell Vpower Racing that uses ethanol to reach 100 RON.

[Sp00ny]

Don't bother with Shell. I had my worst ever figures with V-Power. They use ethanol to get the mixture to 98 RON. I average 7.5-8.5L/100kms on vortex and have been for the last 9 months. V-Power I topped out on 10L/100kms. With V-Power your better off using Shell's E10. Talking to my mate who deals with the refineries through his work, Vortex is the best, followed by Mobil 8000 then BP Ultimate.

Rob

As above. Shell don't use Ethanol in V-Power, if they do then they would have to state it to avoid legal ramifications. Also I have a relative that works for Mobil and he says BP Ultimate is above all, it is "cracked" at 98 RON (same as what aaronng told me a while ago) and is very clean. He said Caltex/United fuels are of a much lower standard/quality than BP/Mobil/Shell.

The only issue I have with V-Power isn't so much Fuel Efficiency, it's cleanliness, it produces alot more dust/residue compared to BP/Mobil. It also changes the colour of my spark plugs. These tests where done in my old Integra, not my Accord. When I tested them all in my DC2 I found Mobil 98 gave the best Kms just over BP but BP was the cleanest. Both Caltex and V-Power gave similar k's (about 30-40 on avg less and left ALOT more residue/soot than BP/Mobil.

[hughba]

Even a cynic like me can't ignore that so many big manufacturers support BP Ultimate.

I'm sure they get paid to do so, but I still doubt companies like FPV would be willing to write recommendations on the fuel flaps of their cars unless they thought it was halfway decent.

[cdbstock]

Looking for a volunteer:-
Have a 2006 Euro Luxury auto.
Have major problem with excessive fuel consumption - app>14l/100km
Having problem with Honda Aust - wont accept there is a problem even though have dyno & AFR chart indicating major AFR problem.
Need a similar Euro auto achieving near published consumption to compare dyno & AFR - I'll pay. Volunteer would help me determine if my car has poor AFR & get a free dyno & AFR chart.

[cdbstock]

Looking for a volunteer:-
Have a 2006 Euro Luxury auto.
Have major problem with excessive fuel consumption - app14l/100km
Having problem with Honda Aust - wont accept there is a problem even though have dyno & AFR chart indicating major AFR problem.
Need a similar Euro auto to compare dyno & AFR - I'll pay. Volunteer would help me determine if my car has poor AFR & get a free dyno & AFR chart.

[Crapdaz]

Looking for a volunteer:-
Have a 2006 Euro Luxury auto.
Have major problem with excessive fuel consumption - app14l/100km
Having problem with Honda Aust - wont accept there is a problem even though have dyno & AFR chart indicating major AFR problem.
Need a similar Euro auto to compare dyno & AFR - I'll pay. Volunteer would help me determine if my car has poor AFR & get a free dyno & AFR chart.

what's your AFR no.?

[ewendc2r]

Hi guys -- This is my dad.. (CDBSTOCK) ..

I've gone through a lot of different items with him, and its going to be a hard one to test / find fault.. (As above, no ECU Codes being thrown)..

Dad -- I'm sure someone will have a stock DYNO floating around (as mentioned in this thread, there have been stock dyno's carried out in the past) so no need to pay for someone else to get a dyno (in my opinion).

The best way to fix this long term is simply get aftermarket management so you can tune it (and know exactly what AFR's are being thrown out).

Since you don't drive your car with any sort of recklessness, I would think that by getting a tune with K-Pro or similar, you would be able to tune for economy rather than power (as most people do).

What are thoughts out there? Stock ECU is always a compromise between power and economy. As much as we can tune to get more power, surely we can also tune for more efficiency?

Interesting point above about the MAF/MAP sensor -- Worth looking at, can get dirty relatively easily...

Now -- To get more than 300kms a tank out of my Type R, thats a challenge lol.

[Crapdaz]

hey..

how many short trips do you do? trips that take less than 5-10mins?
e.g pick up kids, or go down to shops etc.

I know a work mate who has a commodore VL or something 2007 model.
On highway and suburban with him driving it'll be like 13-14L/100km but with the wife (picking up kids, shops etc alot of short trips) was pulling 20L/100km.

[primetimex]

Also I have a relative that works for Mobil and he says BP Ultimate is above all, it is "cracked" at 98 RON (same as what aaronng told me a while ago) and is very clean. He said Caltex/United fuels are of a much lower standard/quality than BP/Mobil/Shell.

Sp00ny does this mean that buying Vortex 98 is nowhere near as good as BP Ultimate 98?

[aaronng]

Sp00ny does this mean that buying Vortex 98 is nowhere near as good as BP Ultimate 98?

Seriously, can't tell a difference between Ultimate, Vortex98 and Mobil 8000.

[cdbstock]

has anyone got a dyno/AFR chart for a cl9 euro auto? Can you post it? My 2006 euro auto lux gets >14 l/100km - sedate driving generally under 2500 rpm - mainly short trips around 10 to 20 minutes.