It’s actually a smart idea to use Amsoil right out of the dealership especially if you ride aggressively or in tough conditions and cold weather. People say you can use it for twice as long as other oils, but as I advised above, I would not push it that far and would still keep a check on the performance of the engine to gauge when to change the oil.įinally, you can use Amsoil synthetic oil at any point during the life of your Harley Davidson, whether it’s right out of the dealership, or many years down the line. Which brings us to the next plus point: Amsoil is very great value. As a result, you’ll have less damage and wear, and end up using less oil over a long period of time since you won’t be needing to change it that often. No matter where you ride your bike, this oil is designed to provide better protection. This oil is made with additives that inhibit deposits and contaminants from forming, especially under higher temperatures. It can be used in both the engine and the transmission, which is a huge plus point, and another reason it’s so trusted and used by motorcycle brands. It is an effective lubricant and keeps your engine parts moving smoothly and cleanly. They have the stamp of approval from the biggest motorcycle rallies in the nation:Īmsoil is a very efficient synthetic oil, as it is able to reduce the engine temperature by nearly 40 degrees. Harley Davidson Road King Vs Street Glideīest Oil For Harleys Amsoil Synthetic oilĪmsoil is probably the most well known and trusted brand of motorcycle oil for Harley Davidson.Did you know you can recycle oil and filters?.However, since Harley Davidson is rather ubiquitous and they’re a single manufacturer, there are indeed some preferred oils over others. Depending on the kind of engine you have, you will need a specific kind of motor oil. One important thing to keep in mind is that motor oils are not one size fits all. Oil also forms a protective coating around the metal parts which limits contact with oxygen, preventing oxidation, which further wears out the metal parts(akin to rusting) Not only that, but increased friction means less power output to the wheels, since a lot of the energy generated by internal combustion will be lost as heat just in overcoming the friction. The better lubricated your motor is, the longer your parts will last, because friction wears down the metal parts. Oil is very important because it keeps the moving parts in your engine well lubricated and reduces as much friction as possible. We’re not sure that the quieter operation is worth the hotter operating temps and (arguably) stiffer shifting.An important and essential part of Harley Davidson maintenance and ensuring that you get the most miles out of it as possible is by using the right motorcycle oil and changing it at regular intervals. In conclusion, 75W-140 can certainly be used in Harley-Davidson transmissions. That’s why the 20W-50 motorcycle oil’s viscosity is so close to that of the the SAE 110 transmission fluid.Īlso note that the 75W-140 is a whopping 47% thicker than the commonly used 20W-50 and 31% thicker than the (SAE 110) V-Twin Transmission Fluid. Note that different scales are used to measure the viscosity of motor oils and gear oils. V-Twin Transmission (SAE 110)- 20.7 cST.The oil viscosity is measured in centistokes (cST) at 100☌. Here are the viscosity numbers for AMSOIL V-Twin 20W-50, V-Twin Synthetic Transmission Fluid and Severe Gear Synthetic 75W-140. How Does 75W-140 Viscosity Compare To Other Transmission Oil Options? A thicker transmission fluid may actually make gear selection slightly more difficult. Shifting performance– There is no shifting performance benefit to using a thicker fluid. Wear protection doesn’t necessarily improve by using a thicker oil. AMSOIL V-Twin Synthetic Transmission Oil or AMSOIL V-Twin 20W-50 Synthetic Motorcycle Oil can provide maximum transmission life. Wear protection– Using a 75W-140 will not improve gear wear protection. Hotter transmission operating temperatures would be the result. The downside to using a thicker oil is that it will hold more heat. The thicker fluid can dampen noises and rattles. The reason that some Harley owners use 75W-140 is that the transmission tends to run quieter. Let’s discuss the pros and cons of going with 75W-140. For instance, AMSOIL V-Twin Synthetic Transmission Oil is an SAE 110 gear oil. But, do consider that 75W-140 is much thicker than oils typically used in Harley transmissions. Our answer: It is perfectly acceptable to use 75W-140 gear oil in Harley-Davidson transmissions. Auto Cleaning Products, Degreaser and Carb CleanerĪ reader asks: Can I use 75W-140 gear oil in my 2007 Harley-Davidson Road Glide transmission? Some say that the heavier oil quiets down the transmission.Shock Therapy Suspension Fluid #5 Light (STL), #10 Medium (STM).Synthetic Multi-Vehicle Power Steering Fluid (PSF).
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