Originally Posted by Jason@Spec-Ops

Do they have AMSOIL in Japan ? I bet if they drove down the street to HKS, you wouldn't find a bit of Mobil 1 in their cars

Originally Posted by Thore

You beat me to it. I was going to ask that when the temp started getting hotter.

I'm at 4,000 miles right now and about to change the oil and send a sample off to be analyzed. (SSO 0w30)

Just found this new thread.

Originally Posted by Summit1

Mobil 1 Synthetic 0W-30 + OEM filters.

ALL weights of oil are TOO THICK when you start a cold engine--and that's when 85% of the wear takes place. So, all other things being equal, you want the lowest possible weight oil if you do a higher number of cold starts. There are of course other factors -- if you live in a warm climate, your engine will tolerate higher weights. If you tend to do more long distance driving in a warm climate, same thing.

However for those of us in the Northeast where morning temps are generally less than 80-degrees F, the lower weight really helps reduce wear and tear at startup. I do about 75/25 short hop vs. longer runs (>100 miles).

Given the amount of local driving I do, I am following Mitsu's more aggressive maintenance program, so oil changes every 3000 miles or 6mos, whichever comes first.