Motor Oil Testing - Hot (Part 2 of 2)
Comparing heated 5-W30 synthetic motor oils from Mobil 1 and Castrol to 0W-30 full synthetic motor oils from the same companies, and standard Castrol 5W-30 and 10W-40 motor oils.
See Part 1 (cold testing): • Motor Oil Testing - Cold (Part 1 of 2)