Being a gear head, always thinking about engines, transmissions, transfer cases, Diffs, starters, alternators, injectors, etc, etc and seeing them work, or Not work in my head a good deal of the time, I sometimes relate to them. I used to relate to the Toyota 20R, dependable, tough, good power and torque for its size, but I have also related to engine oils over the years. I used to be like a ND30, like the ACCEL ND30 i use in a few of my vehicles,...not good in the cold, not good in the heat, unrefined and just plain unacceptable for many applications. But over the past few years, Life has changed myself into a more tolerable, flexable, adaptable person. Like a Synthetic. Currently Im relating Alot to Castrol EDGE 5w-30, a little bit to the 10w-30, what Oil do You relate to?