OK - OK.....new O2 sensors I will buy.....20% is $6 per week on my fuel bill so that's over $300 per year...probably more like $500 taking into account long trips like next week I drive to Townsville and return.
So, I've ordered and paid (it hurt) for 2 new ones on Ebay - $58 ea plus $7 postage - gen Delphi 4 wires.
I guess I can't take good advice eh!
And I'll post on the improvement.
Thanks.'
ps...that 400km is figured for 63 litres...that's about 16 l/100km...stone the crows.
in all city driving very consistently get 400-420k, its a wagon so its a 68L tank, but whenever i fill its only just over 60L
thats manual and never taking it above 3000rpm