Just wanted to warn others as this was my first experience with an unopened jug of Premium Plus I had stored in the boat since last summer. I just opened it and started to pour it in my tank. Luckily I was paying attention and didn't just blindly dump it in. It has "clumps" in it. Almost looked like Prem Plus colored runny cottage cheese. None of that specific bottle ended up in my tank. But I'm contemplating emptying my remote oil tank and refilling with fresh just to be safe.