So the problem im having is the thunder is running rich, like guzzling the fuel 350km/tank. Now I admit I give it a bit here and there but not enough to be consuming massive amounts. It recently had 2 oxy sensors replaced and a catalytic convertor and haven't been driven for the last few days but remained to still chew thru the petrol. I run 98 premium always, car has a very slight miss hard to notice, is this normal? Checked the spark plugs all have white ends to show running lean but was told all v8s are tuned to run lean because of emissions? il be replacing the plugs with brand new iridium ngks and the leads with 10.5mm eAgles to hopefully clear out an likely idea to be those. Also air filter replaced, other wasn't to dirty, and has just had an oil change if that helps. Exhaust is a 2.5" twin cat back with stock headers and no exhaust leaks, manual transmission. Any experience with the same prOblem will be useful Thanks guys
