So... I've been running mobil 1 5w-20 synthetic since January anyway. Good for me. Apparantly I missed that in March, Toyota put out a TSIB that approved 5w-20 GF-4 oils for use on most of the older engine blocks.
Which is fine for me. A couple horsepower, easier pumping, better cold starts, no downside. Everyone else should pimp it.
Like always. Mobil oil's put out phenominal stats on Toyota v6's (and ofhand, everything else).
