Is GL-5 80w90 gear oil ok for the cvt transmission of a 50cc 4 stroke scooter?

It does not say on the scooter anywhere what type is reccomended but i read somewhere of ppl using gl-5 80w90 gear oil and ive also read about gl3. Please enlighten me =).Is GL-5 80w90 gear oil ok for the cvt transmission of a 50cc 4 stroke scooter?
GL5 grade is highest grade commonly available.





Many scooters spec GL3,,,gl5 is an UPgrade,,Large jump in quality and protection





80w90 is unnecessarily heavy for a a 50's load capacity and speed capability.


It will never come near Needing that.





70w or 75w will give excellent results,,,,and MIGHT even give a small bonus in performance(at least vs 80-90





CorrectaMUNDO ,,You guess Exactly Right about people dont understand.


They know so freakin' little ,they dont even know when they dont know.


................................


GL5 is Best Grade and THE thing to use.


If your Manual says GL3,,,open it to that page and put it under your scooter when you drain your old oil ,,,to keep your floor clean.


That's ALL a GL3 reccomendation is good for.





Use the lightest you can find which is gonna be 70 or 75.


Nothing really Bad or wrong about Heavier--up to a point,,,but it's not necessary.





Now lets see how many Thumbs Down and ';corrections'; I get about ,,,Ohhh,,,Gear Oil is Tooo Heavy!!!


75W is Toooo THICK!





Count them and you'll know Exactly how many people are willing to open their mouth without having a Clue,,,


or 1 minute to spare to learn about gear oil viscosity ratings





It'd be Funny sometimes if it wasn't so sad





Heck,,even Wikipedia has an article





';Gear oil is a motor oil made specifically for transmissions, transfer cases, and differentials in automobiles, trucks, and other machinery.';





';API GL-3, oils for moderate conditions. Contain up to 2.7% antiwear additives. Designed for lubricating bevel and other gears of truck transmissions. Not recommended for hypoid gears. ';





';API GL-5, oils for severe conditions. They contain up to 6.5% effective antiscuffing additives. The general application of oils in this class are for hypoid gears having significant displacement of axes. They are recommended as universal oils to all other units of mechanical transmission ';





';API viscosity ratings for gear oils are not directly comparable with those for motor oil, and they are thinner than the figures suggest. For example, many modern gearboxes use a 75W90 gear oil, which is actually of equivalent viscosity to a 10W40 motor oil';





http://en.wikipedia.org/wiki/Gear_oil





If you happen upon a Synthetic at a decent price,,go for it.


You dont really NEED it,,but the benefits it offers is worth the couple extra bucks,if only for the extra ';safety factor'; when you go beyond a normal change interval,,,or run the scoot wide open for an hour nonstop,and so on.Is GL-5 80w90 gear oil ok for the cvt transmission of a 50cc 4 stroke scooter?
What kind of scooter- as in make, model, year. 4 stroke tells little more than engine type. Scooter CVT transmission usually means a belt drive/variable spaced pulley (Comet system) running dry but the DAF pattern double cone and metal band does run wet- but the few references to this type indicated Type F auto trans fluid- the same as old Ford auto transmissions. Simplex wheel and friction drive is also dry. GL5 gear lube has some sulfur and zinc that reacts with brass/bronze transmission pieces, GL3 is non sulfur and doesn't foul brass/bronze pieces like synchros, washers, shifting forks. What does engine call for- 10-30, 10-40, 20-40, straight 30 weight? Transmissions MAY call for same oil as engine- especially if engine/trans share common housing..
NO, do not use that, it's much too thick. Use 10/30 or 10/40 motor oil.





ADDED - No do not use ';MasterPro chemicals gl-5 80w-90 gear oil';.





It uses the same oil as the engine.
What TXm42 said.


I use whatever gear oil I have on hand.


A 50cc scooter isn't going to need a high grade of gear oil in the transmission case.


It's going to use 10w40 motor oil in the crankcase (engine oil).
i believe that all scooters have wet transmissions. meaning that your engine oil is gonna lubricate your transmission. so i wouldn't use gear oil. that could be really bad.