I have a 1996 Landcruiser with a 1FZ-FE 4.5 litre DOHC enging, the problem that I am having is that it is severley heavy on fuel. I do alot of towing, nothing big, and am getting 23L/100Kms. OUCH I am going broke, it gets over serviced, full filter change every 5000kms. just put full new exhaust system on with extractors, due to a collapsed CAT converter, I have 2 hyclones in it, new plugs, leads, cleaned the airflow meter and throttle body. ??????? I am out of ideas please help.