The last Post I talked about how lubricants on the Chain work and Friction created by the Chain/Bar and how important it is for good bar and Chain life. High tack oil is the best under normal conditions. Chainsaw oil is Classified in two categories Summer which is Heavier and Winter which is Lighter. Summer oil is thicker to stick to your saw if was not thicker it would fly off. Winter oil on the other hand thinner for a couple different reasons, first it will pour easily, plush it will still circulate in cold temperatures.Earlier on, we talked about how chainsaw oil doesn’t follow the exact same weight classification you’ll find in other oils, although they’re not all the same weight. Instead, they’re broken down into summer and winter varieties. This is because in summer the heat from the sun will thin the oil, whereas in winter the cold air will thicken it. If you don’t use the right oil at a particular time of year you’ll end up with severe damage to your chain due to a dry saw. There are still other ways it’s broken down even further to help you come to a quick decision on what to buy. Petroleum-based oils are the most popular by far at the moment, but chainsaw oils might look a little different in a few years time. There is currently a lot of hype surrounding bio-oils, which are comprised of cold pressed vegetable oils. The reason we’re shifting towards environmentally-friendly chainsaw oils is thanks to how the machines actually work. In case you didn’t know already, they’re considered a total loss system. This means every last drop of oil is going to end up in the environment or inside your body. If it’s not landing on your skin when it’s sprayed off the bar or inhaled when it’s misted off, it’s causing a negative impact on the environment. It could even destroy things like outdoor ornaments in your garden, so it was only a matter of time before we tried to come up with an alternative solution. Lots of big companies are starting to manufacture bio-oils with some of them being extremely biodegradable. Up to 90 percent of the oil will degrade in a matter of weeks, plus they’ll work just as well as the alternatives. Have a nice day... Stumper