$100
The fuel mixture for a Stihl chain saw is gas and oil.
For a 20" Bar 325 Pitch .063 Gauge Chain 81 Links
The Stihl 064 is a 84.9cc chainsaw.
At your local Stihl dealer
Stihl 029 super 56.5cc 3.8hp
The Stihl 023 is 40.1cc - 2.45cu.in. -weight 10.1 lbs. w/o bar and chain
Bosch 7547 or better Bosch WSR6F. Also good results with NGK BPMR6A. Gap set at .020 to .025 for hot spark.
.025
Can I put a 18inch bar on a stihl
I believe 111cc's or 6.77ci's.
Some Stihl chain saws have an adjuster underneeth the saw to turn up the oiler .