oil consumption

Hi! has anyone here have oil consumption and also have a tune on thier car? my car have been consuming oil from the start, im at 28 miles and my consumtion has been consistent (1 liter for every 1500-2000 km) has anyone tuned thier supra and have oil consumption?

Just finished a regular drive in my Supra (no pulls or hard driving) and checked my oil After that I turned off my engine for 5 min, started it again and checked again after the engine was running for another 5 min someone have any explanation for this? Should I add more oil? There is always a...