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Old 07-11-2015, 07:25 AM   #28 (permalink)
Pepperoni
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Join Date: May 2012
Location: Portugal
Posts: 31

ave(c)o - '08 Chevrolet Aveo (3 door)
90 day: 45.6 mpg (US)
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The last time I filled the gas tank, it was with 98 RON. I've done 820km (once the estimated range goes bellow 50km, it's time to refuel). So at most I could do 870km with a tank.
Now I've refilled with simple 95 RON, and it's the worst millage I've ever done! Less than 790km! What's going on?!

Could it be that the previous fuel filter had already something obstructing the fuel passage, so it would burn less fuel?

Or could the spark plugs be the cause of it?
The user's manual says that the spark plugs should be exchanged at every 90.000km, so 30.000km are still missing until they are replaced.
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