[LancerEVA06]

4awg should have approx. 0.00025 per foot. If you're getting 0.6 ohms from your ~15' wire you have a problem with either the wire or ohm meter.

I just went outside and checked resistance from battery (-) to alternator body. 0.0003 ohms which is with the "BIG 3" upgraded.

The big 3 is upgrading the following wires with the biggest you can possibly use; 1) alternator positive to battery positive, 2) battery negative to chassis, and 3) engine ground to chassis. Some people replace the factory wiring; others add additional cables to the factory wiring.