Dick Winkles is a good friend, a walking bible of Viper knowledge, but no worries asking a simple question. We often don’t question what we read on Forums even though we all know the example of passing a short sentence around a 4th grade schoolroom by whispering in someone’s ear. The result is completely different by the time it reaches the last person, so feel free to ask questions as you are likely anal about your Viper as many of the rest of us. In this case the answer quoted from Mr. Winkles is correct, but he has also told folks to use 15-50w for track use, so it does depend on what thread ( of the zillion out there ) one might read. Ask away, your fellow Viper Owners are here to help and clarify.