Older 2 stroke equip. (Chain saw)

[TSLPE]

Just had service done on my chain saw which in approx 29 years old. The fuel mixture according to instructions is 16 to 1. Most of the newer 2 stroke stuff today is 40 or 50 to 1. They tested and tuned my saw with a mix of 40 to 1 saying that the oils of today are far superior  than 29 years ago and a 40 to 1 mix is ok for older 2 stroke equipment. What do all you people think? Will it be ok? It won't be getting a lot of use anymore. My firewood cutting days are over. Just be using it for storm clean up and elk camp. 

[FC]

I would probably keep the oil mix rich just to keep it from over-revving, it was designed to run at 16:1, I would keep it there. I'm sure premium 2 stroke oil is better but that is also a 29 year old 2 stroke engine.

[Kittman]

It would be better to keep the mixture screws adjusted to the rich side, and then use 40:1 mix you should be just fine.  Chainsaw will only over-rev if the idle screws are set too lean, and that condition will destroy the engine rapidly.

[jay.sharkbait]

Run it at 40-1.

And try to get ethanol free fuel or drain and run  the saw dry after every use.

The saw shop is right.

[Mike450r]

40:1 is fine for the smaller engines with the better synthetic lubricants out now.   32:1 for the larger engines like motorcycles etc...

[mazama]

All of my saws are older,most mixes are designed to mix with one gallon of fuel,i stop the pumt at about 9:10-i also add a couple of squirts of stabil to every gallon,ido same for mower and i never have a problem,over time all chainsaws have to be adjusted-even elevation can effect them.