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1. Replace your 02 sensor - (About $50 for generic one)

2. Check brakes arent grabbing - jack up car and spin each wheel

3. Check tyres are around 35psi (I measure when hot so put in 36psi)

4. Check your coolant temp is around the 1/2 mark on the dial. If your coolant temp sensor or thermostat is casuing the ECU to think it is running cold then the ECU will run the engine very rich - had this problem with a corolla anfd gained ~50km a tank.

5. Does the wheel alignment seem ok?

6. Run some fuel injector cleaner (redex one is good - $15 concentrated - use around 20-50ml)

7. Replace spark plugs with NGK BKR6E ($20 for 6)

8. Use some contact adhesive cleaner or equivalent ($10 Jaycar) and spray your AFM

9. Get a $50 dyno run once this is done to check idle and light throttle Air/fuel ratio is at 14.7, also get a log of the A/F Ratio at full throttle (most likely very rich)

All up about $150

This may save you a ~$10/week on fuel and you will also know that your Air fuel ratio is safe at full throttle or not.

To fix the richness at full throttle get a SAFC and tune ~$500 or PFC ~$1500

I get around 10-12L/100km depensing on driving. Highway should be 10! which means 400km ~ $55 ($1.35 for premium)

Edited by benl1981

benl1981: cheers mate! Will be putting the skyline through a service this week. Turns out all the worry was over nothing. Got a 5 day data entry position which will give me money to spare!

Will still look into the above mentioned as it is always nice to save abit of petrol. A mate of myne has a series 2 with larger turbo and other mods and he still manages better fuel consumption that me! Myne is sitting at 14-14.9L/100km and he seems to be getting 11-12L/100km. One time i managed a 16.4L/100km. Was proud of myself ;-)

I will get the all checked out neway as i feel it is using more fuel than is needed. especially considering i'm driving as slow as a granny popping sleeping pills.......

Use ethanol blend fuel such as Boost 98 from United. My GTR loves it and there's been a few discussions about it on this forum previously. More power from the same (or similar)fuel qty= less tendency for right foot syndrome, or so you'd hope if u wanna save coin. Definately cheaper than the mainstream 98RON fuels. See if it works for you.

The boost 98 petrol is good and you can use it but it will run slightly leaner - not a problem if stock ecu usually. It also has a lower energy value per litre than standard fuel so you won't go quite as far on a given volume compared to 0% ethanol petrol.

You can make more power on it by advancing the timing a bit though.

A mate of myne has a series 2 with larger turbo and other mods and he still manages better fuel consumption that me! Myne is sitting at 14-14.9L/100km and he seems to be getting 11-12L/100km. One time i managed a 16.4L/100km. Was proud of myself ;-)

Hmm, not sure if you realise, but that L/100km value is supposed to go down :D

Unless you were proud of using more fuel? In which case I am proud to use ~30L/100km on the track :worship:

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