[Euro] Fuel Consumption

Do you guys in Canberra and Brisbane have Caltex Vortex Gold with 98 Ron Octane?
In Victoria I am only seen Caltex Vortex Gold 96 Ron Octane!



As for whether to use BP Ultimate 98, Shell Premium 95, Shell Optimax 98, Mobil Synergy 8000 98, Caltex Vortex 96 (Vic)..... well the thing is your car's ECU is best suited to the type of OCTANE that the car was tuned for.



Since a higher 98 Octane level fuel actually has lower volatility, which means its harder to burn despite having more potential energy, if the car's Ignition Timing is more conservative than the 98 Octane then your car will actually run richer and hence lose efficiency. Not to mention that 98 is more exxy than 95!


I am still deciding which fuel to use but with a lowly 7000rpm redline only (for a honda neway!) and a biggish, torquish 2.4L engine I would probably stick to lower end 95-96 premium for now.


Only thing I know is I would not use Shell Optimax however, it has very high sulphur content, it will affect the metal inside the engine, run dirtier, smells like bad egg, etc.


But if I will tune the crap out of the car with ECU, prob use Mobil 8000 Synergy > Optimax > BP Ultimate as most tuners don't recommend BP Ultimate as its susceptible to knock.. :(

interesting. always thought BP ultimate, was, well, the ultimate :D

You guys need to remember that the Euro's electronics 'learn' how you tend to drive the car & make it respond to your driving style. If you tend to give it a bootfull off the line all the time well that's how the car will respond. If you drive sedately, the electronics will adjust the throttle response & in the Auto , gear changes, to react like that all the time. The car will adjust to your inputs if it notices a change. But what it really means is that if you tend to run the traffic light grand prix everyday you WILL use more fuel because the car thinks you want it to respond that way all the time. It is far more complicated than I have just described but essentally that's what happens. :wave:
Eurotony

Is this only applicable to Automatic?

If so - I am guilty.. :(

Too much grand prix starts chasing magnas and mazda6 these days !

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Originally Posted by Omotesando

Is this only applicable to Automatic?

If so - I am guilty.. :(

Too much grand prix starts chasing magnas and mazda6 these days !

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No I don't believe it is only the auto, I think the manual responds in the same way, except when it omes to changing gears obviously.

man i always go redline at leat 3 times per day....
guilty as charged your honour
so how can i get my euro to "reset" so to speak

Drive the car sedately & the car will learn your driving style. It won't take long, but if you don't put the gas pedal to the floor, you will find that the throttle won't make the car leap off the line. A number of people have made mention in various threads about how sensative the throttle can be off the line. It's because the car thinks that you want it to be.
If you drive the car sedately the car will use less fuel, makes sense really when you think about it.

Does that mean that if you're granny footed, the gears take longer to change when you plant the accelerator?

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Originally Posted by nexace

Does that mean that if you're granny footed, the gears take longer to change when you plant the accelerator?

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In theory the answer would be yes. The car reacts to changes in the way you drive it fairly quickly, so if you have been 'grannying' around town & all of a sudden you wanted to get stuck in, it would take a couple of changes before the car reacts differently. The changes we are talking about are only small. Things like the throttle response & the way the engine produces the power & in the auto, the way the box changes gear. All good stuff. :honda:

Thanks Eurotony! I've been taking it easy during the run in stage but after I get the first service done, I'll start pushing it a bit harder after the car is properly warmed up. :thumbsup:

From memory, doesnt the car remember the last 40 gear changes and adjusts from there?

Update: I was out at OZHonda meets on Friday and Saturday, and I drove over 200km in total. Lots of throttle and shifting at 5000rpm (and 7000rpm too). Well, I just refilled today with a distance of 391km. The amount of petrol filled was 34.08L! I thought the pump stopped early, so I pressed again and it filled for only a few seconds. I pulled out the nozzle and saw that the petrol was not going down past the flap so it must have been full to the brim! So I got 8.7L /100km with aggressive city driving and this is the first time in my 13000km of driving the Euro where I have come upon such a low fuel consumption for such aggressive driving!