Dave,

Can I use petrolium based after run oils in my YS 2-stroke engines or does the prohibition against petrolium based after run oils only apply to YS 4-strokes? I been using the non petrolium based stuff on my 45's and 61's as well as my 91's for years and I have read a few posts online lately where folks have said the YS 2-strokes don't mind petrolium based after run oils (even though the 2-strokes still have the same silicone parts in the fuel regulator as the 4-strokes) and this distinction is news to me.

Just trying to get the straight scoop.

Greg