In this month's issue of Lubes 'N' Greases it listed all the GP I, GP II and GP III plants in the world and I was surprised to learn there are no GP III plants in the States.
GP III production has increased a lot in recent years and since most synthetic oils made in the States are GP III based it's all derived from imported oil. That may not be a surprise to some but it was to me.
GP III production has increased a lot in recent years and since most synthetic oils made in the States are GP III based it's all derived from imported oil. That may not be a surprise to some but it was to me.