how many miles or Kms ?
what maintenance has been done ?
what speed on the highway ?

 

Sorry.It's Km,
At city traffic-8-9 Km/letter
At long run-10-11 Km/letter

I have changed spark plugs.(NGK) recently.

Highway speed is 75-85mil/Km

Thank you for quick reply.

 

try these new spark plugs.. they are a good penny but omg they are worth it ..

The world's most powerful spark plug from Enerpulse

 

It does seem to be using a bit more fuel than you would normally expect. Have you got a clean airfilter in? A clogged airfilter will hurt milage. Does the engine sound as if it is working hard to maintain highway speeds or does your top speed seem hard to hold? Maybe a collapsing catalytic convertor or muffler is restricting your exhaust, which will also effect milage. What are your milage figures in miles or km per litre?

 

Thank you 4 informing me.I didn't try these things.

 

hey IanH why dont u join us at DNE "Dallas Nissan Enthusiast" come out to our monthly meet..... Dallas Nissan Enthusiasts .. our try our forums http://www.nissanforums.com/dallas-nissan-enthusiasts/

 

11 kilometres to each litre works out at about 31-32 miles per imperial gallon. I don't know if I understand correctly but do you mean speed in miles per hour on the highway? if in miles the highway figure might not be too bad , if in km not so good. The town figure doesn't look too good either way but it depends on how much stop start driving you are doing. Highway figures at around a speed of 100kmph are usually a lot better than stop start driving in traffic. However fuel use usually increases fairly sharply over about 130kmph or so.