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I cannot understand how the gas suppliers control non-US car manufactures fuel economy?
I had an 89 Nissan P/U with the Z24 engine (factory w/8 plugs) and commonly calculated 35-40 MPG. Now, 20 years later with tech advancements, my 2009 Versa gets much less.
My current calculations average 29 MPG (driving like grandma) and 28 MPG (driving like speed racer). This is FAR from the window sticker of 31 (some get 36) as advertised.
I have less than 2000 on the clock and will keep better records for the future postings.
I travel 25 miles to and from work daily, at highway speed (55-75) with the same results. Maybe the engine needs more miles¿
So I have been trying to keep track, and just started recently.
So for example, on October 31, 2009 I put 39.78 Litres in the car, and the tank was 485 kms. So I take 485/39.78? That would give me 12.19 kms / litre. Is that how you do it?
If so, for the past four fillups (usually fill up once a week), I have averaged 12 kms/litre. Keep in mind, it's been very cold up here, so heat has been on all the time, and I have been doing about 80% city driving, and have the CVT transmission.