I've read the threads, glommed over the success and horror stories, chewed all my fingernails off and with shaking hands ran my credit card across the terminal at O'Reilly's and walked out with two quarts of Royal Purple. I dumped out the old and put in the new fangled stuff and held my breath as I fired the old Putzfrau up. No leaks. It probably would happen that fast anyway although she did get HOT as I synched the carbs after finding a niftier route to the controls. Afterwards, I went for a 300 mile run, half freeway at up to 85 miles per, the rest twisty heaven with almost deserted roads along Mt. St. Helens. (HWY 25 is open all the way now, unlike my attempt 2 weeks ago.) Reminds me of why I kept the tutonic twin, it ate up the choppy road sections with minimal protest. But you have to know how to ride these old girls, like a stubborn German (redundant?) they don't like to change course while fully committed to a challenge. I replaced the main seal not long ago but the pushrod seals and most others are at least 15 years old. But still no leaks!