The focus of the presentation is not to make you a chemist, but rather to explain in simple detail what is in fuels, how to properly handle and store fuel, and to give you an understanding of the new fuels of today. Higher octane fuel may contain other additives that may enhance the fuels’ stability, and fuel system cleanliness, particularly in automobiles. Winter fuel will vaporize at approximately 34°C and summer fuel will vaporize at approximately 45°C. Therefore, on a warm day of 28°C and some added heat from the running engine, winter fuel may become active or percolate in the fuel tank and could vapour lock in the fuel lines or carburetor.
I cut almost everyday, as I run a tree service, I run mid grade 89 octane mixed at the 50:1 that STIHL recomends on the bottle. They all have come back to the plain vanilla mix of mid grade gas mixed at 50:1 All this being said the company VP that makes race gas and other fuels has a new product called SEF, I would try it if it does not cost much more than what I do now. They also have the gas pre-mixed at 50:1 for use in 2 cycle engines…..
Some pro saw users don’t realize that low octane fuel not only reduces a pro saw’s performance, but can damage its engine. The only thing you really need to know about octane is today’s pro saws need fuel with a minimum octane of 89. An even better way to store a saw engine is to remove the fuel as described, and then partially fill the tank with a product like 50 Fuel.
Once you have enough octane to prevent detonation, higher octane does not mean higher power, at least not without making physical changes to the engine. Your old gas had ethanol or some other fuel oxygenate in it, and your higher octane fuel did not, or vice-versa. One reason for using higher than the minimum rated octane for your engine: most automotive gas loses octane as it ages.
To start, both Stihl and Husqvarna recommend the use of high octane unleaded gasoline. Both brands of pro saws are designed to burn fuel rated at 89 octane or higher. Most regular grade fuel has an octane rating of about 87.
87 octane in chainsaw Related Question:
What octane gas should you run in a chainsaw?
Use a minimum of 89 octane gasoline and always use fresh fuel. Only buy enough gasoline that you can easily use up within a two- month period. For air-cooled, two-cycle engines, use a quality mix oil that meets the engine manufacturer’s recommendations.
Can I use regular gas in my chainsaw?
If you’ve put straight gas in the fuel tank, don’t start the engine. If straight gas is used, it can damage and ruin the piston and crankcase within a minute, as the gas doesn’t take long to burn out these sensitive parts.
Can a 2 stroke use 87 octane?
Fuel that is premium is not only better for your equipment, but it is also better for the environment. The high-octane gas and synthetic oil in your two-stroke engine will not leave an odor or burn cleanly, so you can operate your engine worry-free.
What happens if I use 87 octane instead of 91?
“Use premium unleaded gasoline with a posted octane rating of 91 or higher. If the octane rating is less than 91, you could damage the engine and may void your vehicle warranty.
Can I run 87 in my chainsaw?
To start, both Stihl and Husqvarna recommend the use of high octane unleaded gasoline. Both brands of pro saws are designed to burn fuel rated at 89 octane or higher. Most regular grade fuel has an octane rating of about 87. This is not enough.
Can I use 93 octane in my chainsaw?
Hi Octane gasoline does not run hotter, as most people think. It actually runs cooler. Using 93 in the Poulan, won’t hurt it, but it won’t help it either. In fact it may cause the exhaust port and muffler screens to carbon up quicker, due to the lowered temperature.
Can you use 87 octane in a STIHL chainsaw?
STIHL recommends that customers use a minimum of 89 octane fuel. If a customer chooses to use a 91 or 93 octane fuel, no damage to the engine will result. However, using an 87 octane fuel could lead to serious engine damage.
What happens if you run straight gas in a 2 stroke?
Without lubrication, it’ll cause high friction, causing heat and causing metal filings from the piston rings knocking around, and losing a seal. In a way, oil counteracts all of these. If it’ll still turn over, flush the fuel, and put in the correct mixture of petrol and oil.
Can I put 87 in my boat?
Personal boats can use the same type of gasoline as your vehicle, including unleaded (87 octane), mid-grade (octane 89), premium (octane 93), and diesel.
Does higher octane gas store longer?
93 octane fuels are more refined and contain more stable hydrocarbons. These stable hydrocarbons can last 2-3 times longer than 87 octane fuel. Even in proper storage 87 octane gas can start to degrade in 3 months, 93 octane fuel should last closer to 9 months before degradation is noticeable.
What is the best fuel for two stroke engines?
Any fuel type between 87-octane and the 92-octane will work just fine depending on the type of motocross bike you own. If you own a 4 stroke, for example, the 82-octane works just fine, but for a 2-stroke, you should go for the ethanol-free higher octanes (92 and 93) because the lower octanes tend to detonate.
Can I use 87 octane instead of 93?
Most cars on the road recommend a standard grade 87 or 89. Premium gas 90-93 is completely okay to put in a standard vehicle. Car experts say there is no risk of damage to a standard car using premium fuel.
Is 87 regular gas?
Gasoline with an octane level of 87 is considered “regular,” with gasoline sold at 89 octane often labeled “midgrade” by most gas stations.
Is it OK to mix 85 and 87 gas?
In most states, regular unleaded is rated slightly higher at 87. In most cases, you won’t experience any problems running 85 octane in an ordinary car when a few thousand feet above sea level.
Can you use avgas in a chainsaw?
Switched to AVGAS 100 a year + ago and the lawn mower and chainsaw love it! No more starting problems and they run with full power. Just a few pennies more per gallon and its worth it, by a whole bunch, not to have engine problems.