In misc.rural dean wrote:
Because every professional user I have ever seen is using 10W30 engine
oil. Now I'm not about to put that into my Stihls but I was just
wondering if I am wasting money on expensive bar oil?

Any comments?

I use Poulan bar oil from Walmart. Its 30 weight with a tackifier (sp?) in
it so it sticks to the chain better than motor oil. Since it doesn't have
any of the additives needed to keep an engine clean, its cheaper than motor
oil too.