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  • 1 year later...

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 by HotPlates

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 =(

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.

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. :)

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