Just curious, but what sort of equipment uses a 16:1 mix, and how old is it? Outboard motors have been 50:1 or higher for over forty years.
As said earlier, this subject has been beat to death many times here with no resolution. Personally, I use Opti2 mixed with premium gas in all my power equipment. I just mix it according to what it says on the bottle; I have no idea what the ratio works out to be. Of course, my equipment--two Stihl saws and a Stihl brushcutter--is relatively modern. My oldest saw is a mere sixteen years old. If you've got a 50 year-old saw, you might want to stick with a rich mix.
It's important that you don't use TC-W rated oils (typically TC-W3 these days) in your air-cooled power equipment. TC-W oil is specifically made for water-cooled outboard motors. Stick with oil that carries the JASO FD or ISO-L-EGD rating. These are the most stringent ratings for air-cooled oils. FD and EGD are the same spec from different standards agencies.
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
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