Hi All, Got a massive issue with my LS1! Ive replaced the below parts and am seeing fuel consumption of approx 23l/100km!!! And it only marginly better on the highway, approx 18l/100km! I am absolutely babying this car as (ive also had to replace the ratios and other bits in the diff so cant use the excuse im right foot heavy..) - Genuine Injectors - NGK Spark Plugs - NGK Spark Plug Leads - O2 Sensors - Coolant Temp Sensor - Fuel Pump - Fuel Filter Its always ran on Caltex VORTEX 98 fuel, ALWAYS! Also had a MAFLESS Tune done with a VCM Performance OTR! Im at a loss to what else can be stuffed! When it was running like crap (prior to all this work) it was getting about 17l/100km in town and about 10l/100km on the hwy, now i cant get anywhere near those numbers and its supposed to be running well??