I am considering adding some to the tank. I was thinking of adding one of the little bottles per tank full and just want to make sure it is still considered safe. I have not revisited this topic since about 2 years ago. I had a idle knock, coincidentally, start shortly after trying some of the 2 cycle oil. I realize it was just a coincidence, but I want to make sure that this stuff is still in favor for lubricity in a 7.3. Thanks.