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Given a 'tank' isn't a unit of measurement, I suggest calculating L/100km to give a better idea of economy.

But such a significant change suggests something is wrong. Fuel leak, clogged exhaust, faulty O2 sensors.. or a host of other possible problems. If you aren't too 'car savvy', probably best to get it checked by your mechanic.

Edited by sonicii
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There isn't really anything to 'tune' on these cars, unless you spend $$$ on an uprev reflash, or something similar. And you don't want to be doing something like this until the fault causing the poor fuel economy is repaired.

Perhaps they just mean a full service? oil, filters, etc. - even so, it is unlikely to impact the economy by that much.

Did it slowly get worse, or just became bad all of a sudden?

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So when you filled it up after 300km, how many litres did it take? What sort of driving are you doing?

I get anywhere from 8 l/100 km (flat freeway at 100 Kph) to 15 l/100 km (in heavy city traffic with a/c on full in summer), and expect to see around 12 - 14 l/100 km in normal city driving. If I was driving for economy (and I don't) I'd hope to see this go down by 1 - 2 l/100 km. How does that compare to yours?

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i drive normally not like redlining it all the time, i also fill up 98 every time. I called my mechanic and he said he will be able to look at it this weekend so hopefully its nothing major. thanks for all the help guys, i was pretty worried that it might be something major

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City vs Hwy driving makes a massive difference in mine. That being said, I still get at least 450-500km out of a tank and the most that I have even put in is less than 70lt. Keep in mind that these things have an 80lt tank.

80l? I choked and struggled into a city a few years back and only filled up 64l...

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