don’t say by how much it has crept up and whether it’s been a gradual increase or a sudden jump, but Holden’s claim for town running was 15.0 L/100km for a 1999 VT V8 and 13.5 L/100km for a later VX V8. If it’s running well and still packs a powerful punch you should look at those items that might affect the tuning of the engine. Replace the spark plugs, the plug leads, the air filter, perhaps clean the throttle body and give it a good run to blow out any carbon build-up.
times when I drive off in my 2004 BA Falcon XR8 manual I can hear a loud knock. What do you think it could be? G & R Long