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So I did a small check of the more easily accessible spark plugs yesterday to see if any of the plugs looked bad... they all looked clean, but to my surprise, these plugs were not torqued on at all, and were only finger tight... Could this be a possible cause of my poor fuel consumption? I did torque up the front side spark plugs, but the back side spark plugs (the ones closer to the firewall) was just not accessible without needing to remove the air surge tank assembly (which looks like a big task).

So how do we reset the ECU? Unplugging the battery is enough? I assume by resetting the ECU, the ECU will relearn the fuel trims and potentially "unlearn" some of the fuel consuming behaviours? :-)

Thanks all, I've been secretly shadowing this club for a little while now doing research about the car, so newbie at posting, but not such newbie at looking around. :-) There seems to be quite a bit of variance between the fuel consumption people are getting. @jeffy: yeah, I thought about trying that, checking the MAF, getting the injectors cleaned and flow tested and checking spark plugs, checking air filters, checking tyre pressure... its obviously a rather long list of things to check, but just out of curiosity, are there things in the Aurion that typically causes poor fuel consumption? @william: thanks! That seems to be the typical fuel consumption most people get... @shadow: yep, this is the kind of fuel consumption I don't want to get! :-) Although, with the last tank, what surprised me was that I didn't drive like a nut head, but still got 15L/100km! @buff hamster: exactly, I worked out my L/100km numbers based on my recently visit to the petrol station. I had reset the trip counter to 0 immediatley after the time before this one to count the number of kms I had done... I do use Shell's 91 RON fuel... wonder if that normally has such poor economy?

Hi All, First of all, I'd like to introduce myself as a Aurion newbie. Just got back to Australia, and bought myself a 2007 Aurion AT-X second hand about around 2 weeks ago. So far, I have been very happy with most aspects of the AT-X model, except for the stereo, which I've already replaced with an ES866 model from Esrin. However, over the past 2 weeks, I've noticed that my fuel guage goes down rather quickly for a car which apparently has pretty good fuel economy. Today, I fueled up for the 2nd time and got my proof. It turns out that on the last tank of fuel, I averaged 15L/100km! The driving I've been doing has been 99% of the time just light cruising around the city (70% of the time), and 30% of the time on highways. Definitely have not stomped on the accelerator all that much. So I was very surprised by the poor fuel economy. So, just a question to everyone, does this 15L / 100km figure sound normal or could there be something wrong with my new purchase? By the way, it has 98000km on the clock. Thanks in advance for your inputs. Cheers, Dean