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Discussion Starter · #1 ·
Don't get me wrong, I was expecting amazing mpg's being a 600bhp rb30 but didn't realise it would as bad!

I think it's running very rich and I'm probably getting 60kph to quarter of a tank??? Which is ridiculous! And this is driving normally...

What can cause bad fuel consumption?

Thanks
 

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Poor mapping?
 

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Discussion Starter · #4 ·
Well I've now changed the plugs again and it's made a lot of difference! Seems like the original plugs I put in when I bought it only lasted about 3weeks... Lol.
 

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I used to get about 250 miles to a 70l tank with my 600hp RB30
 

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20mpg over 80 miles yesterday, including some hooning. I suppose that's not bad with about 620bhp. Still only 200+ miles per tank.
 
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