[R4Racin]

Yes, this is fine. It keeps the additives in the oil that are not catalytic converter "friendly." Somewhere - on these forums I think - someone said that using it may cause your catalytic converter to fail in approximately 100,000 miles. I am not sure if it may throw emission codes more often or not.
Other than that, it should help lube the top end better.
I bought 13 five-quart containers while they were on sale at AutoZone!