The chain saw you describe is a Remington. As far as I know they are the only manufacturer that used SL-11 as a model identifier. The factory specification for oil gas ratio was 16:1 but with todays oils you could get along nicely with a 32:1 mix of any of the brand name chain saw oil.
Most of todays oils are warrentied against a lubrication failure at 50:1 with fuel at 89 octane or better.There are two oils that meet the ALL standards and stand behind there oils with the warranty I mentioned above.They are "ECHO" or "HUSQVARNA" .
