Im not advocating this for everyone but, personally I find that when you find sludge in your tank - replace all graffix. Here's my routine: check valves, check sag, check spark, check graffix - oops, there's a scrape in the graffix? Solution: new sickkkk graffix. Once again, you are welcome in advance for this informative post.You've got to have sludge sitting at the bottom of that tank.... IF you're storing it...
