what is your recommendation for needle settings for cold weather that is 34 degrees F. I have been running the royal purple in my 2 stroke dirt bike and four wheeler and they have been running rich with out touching them at all !! I'm just wondering if this oil is extra rich the way its made . My dirt bike runs rely rich when run the same mixture as I ran with the old oil which was spectro 2 cycle oil !! The four wheeler is oil injected . The problems didn't start till i switched oils !! I called horizon and they told me to run a ashless oil !! Like lawn boy or penzoil outdoor. Also one more question I have heard the mvvs engines you run premium gas ,I was told by horizon to run regular could this be causing the problems ?? It just says in the book a quality gas dose this mean premium??

Thanks in advance !!

Josh