Mobil 1 Racing 0W30

I have never heard of Mobil 1 "Racing" oil period. I have seen regular Mobil 1 0w-30 and 0W-20 on the shelf at Wal Mart but my turbo PT Cruiser recommends 10W-30 and I use Mobil 1 10W-30 or other 10W-30 synthetics in it.

I use Mobil 1 15W-50 in the Barracuda.