Was wondering what the difference is in these two premix oils. I bought Yamalube 2S and it was $16.00 a gallon a whole lot cheaper than most other premix oils available. My uncle told me that Yamalube was a good choice for my 98 YZ250. I didn't know which one to buy and didn't realize it was that cheap until I got the invoice. Is this a good quality premix? Any suggestions on a good clean oil to use. Any help would greatly be appreciated.;)