Rick -- I don't recall the brand, and I don't have the car with me today (I walk to work 90% of the time). I'll try to remember to check it for you, but it looks as though I don't need to worry as much about additives as I thought (judging by the responses here). My point was just that it was pretty nice of the trucker to offer his advice and even some free fuel treatment!

Have a good day!

Chris