Re: 2 quickies
First question is a yes. The second, well there are a lot of folks here that use a 100:1 ratio, with a good oil. Lots of folks use other ratios as well. It just depends on you and how you feel about it.
Search for oil fuel ratio in the search box and you'll find a lot to read.
"I would rather be exposed to the inconveniences attending too much liberty than to those attending too small a degree of it." - Thomas Jefferson