i did remove the spare wheel and use k&n air filter ,snow mode ,as well avoid supermarket fuel plus add in fuel injector cleaner every top-up fuel for couple months to see it make any different.
comparing with or without the spare wheel there's pro n cons as i get alot of wheel spin when pulling off coner on up hill as there's no weight behind the rear. to make safer on the road i've put on back the spare wheel to road gripping issue.
as for fuel... the car just run really smooth and still have to judge the way steping on the gas pedal.
Does the tyre play any role on to increase fuel economy ??
p.s just bought road tax cost £270 for 12 months :msn-cry:
I'm with you on the Car tax front, did that on Saturday . . .
Hankook clam that over a 650 distance, their new tyre can save up to 6 litres of fuel. No, this is completely dependent upon the way you drive the car, the 'hillyness' of the area you drive through and what sort of roads you use regularly. But if you can get away with driving your Lexus slowly, without W%$kers tooting their horn at you and do your uttermost to change gear around 2000 rpm, then you should be okay to get 500 - 550 miles out of a full tank, also, don't fill the car to the brim with petrol, keep the car light and visit the petrol station more regularly.
Stuart