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R34 Gt25 auto terrible fuel economy

Hobbs
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Hobbs Rookie

Hobbs

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Hi guys, this is my first post so hopefully I can find some answers. My automatic r34 gt25 is giving me terrible fuel economy and my petrol tank seems too small. A full tank from empty only takes 30L, and from what I’ve read a full tank should be from 50-65L. 25L got me 150km with regular driving. I don’t know what the problem is since I know the tank shouldn’t be that low, faulty gauge maybe?

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https://www.sau.com.au/forums/topic/483507-r34-gt25-auto-terrible-fuel-economy/
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Hobbs Rookie

Hobbs

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Ok I’ve since replaced the oxygen sensor, installed a high flow cat. Fuel efficiency is much better but still somewhat inefficient, a full tank from a quarter above empty is around 40 (wasn’t filling up all the way last time) and I’m getting about 350km.

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