I fixed my fuel economy..

[soon2b33]

i'l give the injector cleaner a go too bought the car a couple of weeks ago, and have been getting around 350-400km a tank, (its 65litre tank isnt it?) r33gts-t.

[Modena]

Sorry to awake the dead thread, but my car lately has been getting average fuel economy... Im going to use that nylon injector cleaner this week, then also replace the 02 sensor... I got 96 R33 GTST... stock.

[HotPlates]

I just had my o2 sensor replaced with an OEM Nissan one ($173) on my R33 Gts25t. I've put in that Nulon stuff before, did nothing basically. I was getting 360km to a tank max before the o2 sensor replacement. I'm trialling it now with the new one so I'll let you know how I go. Car still smells like it's running very rich though. Maybe that's just how Skylines are?

If this doesn't work then I'll have to look at getting a SAFC3.

BTW, the only mods I have are a 3 inch exhaust and K&N hi-flow panel filter.

Edited April 9, 2007 by HotPlates

[dan.1337]

360km to the tank? i wish i was getting that. my last tank only lasted me 200km with hardly any boost. i also replaced my o2 sensor recently - but no luck there.

not really sure what else i can do but take it to the mechanic for a look/tune =(

[Modena]

360km to the tank? i wish i was getting that. my last tank only lasted me 200km with hardly any boost. i also replaced my o2 sensor recently - but no luck there.

not really sure what else i can do but take it to the mechanic for a look/tune =(

ehhh do that asap.

[Cubes]

Anyhow, had pretty much given up on it.. but I thought I'd give one last thing a try -- some injector cleaner. Have always been pretty skeptical on them as nothing more than snake oil in a bottle, and tried it a couple of times on other cars and no difference. But this time its seem to make a fair bit of difference.

Economy is now down to about 11L/100km highway, and 12-13L/100km city. Which is about a 2-3L / 100km saving.. which in the end means I'm saving about $2-3 every 100km.. not bad for a $10 bottle!

For what its worth I used Nulon injector cleaner. After 1 tank pretty much the improvement was obvious. Now I've done 500-600km things are pretty much obvious there is a clear difference.

With the old RB20DET I used to run the Nulon Total Fuel system cleaner every 5000km's. It kept fuel economy up around the 10-11l/100km's.

I then stopped running the stuff and fuel economy dropped to around 350km's per tank where I began experiencing starting and drivability issues. I thought it may have been the o2 sensor so I replaced it with a genuine nissan item. Still no improvement.

Ripped the injectors out, new in and all was good, fuel economy back to normal.