Never seen Idemitsu carry the "Altrom" moniker.
At 36 for 4 quarts it seems expensive for 5-6K intervals.
I run their motor oil in my Honda and their trans fluids in all my vehicles- I can be considered a "Fan" but at the right price.
Good stuff for certain- I'm pretty sure m1 EP is hardier and for sub 30 bones at wal mart - a better buy.
At 36 bones you are in M1 AP with big % of PAO, and a few other higher end formulations.
UD