The “80W-90” numbers apply to oil viscosity. This oil has two numbers and has two grades of viscosity. 'W' refers to winter stability. In this situation, the amount “80” means that the oil operates better at lower temperatures. The second number, that is, 90, indicates how thin the oil must be at 100°C.
What is the difference between 75w90 and 80W90?
75w90 has a higher viscosity level than 80w90. Higher viscosity gear oils can tolerate higher temperatures than lower viscosity gear oils. 75w90 oil provides maximum protection to gears against wear and tear. But 75w90 gear oil becomes clumpy at lower temperatures and downgrade the performance of the gears.
Is 80W 90 the same as 10W 40?
The most common mistake is the belief that the viscosity of SAE 80W gear oil is much thicker than the viscosity of SAE 10W-40 motor oil. This is absolutely incorrect!
Is 80W 90 the same as 90 weight gear oil?
80W-90 oil is as thin as an 80W oil when cold, and as thick as a 90W oil when hot. A 90W oil is 90W hot or cold. So an 80W-90 will be a little bit thinner than a 90W when cold, but will be essentially the same when hot. Gear oil viscosity is defined in SAE J306, which has been revised.
Which is thicker 75w90 or 80W90?
SAE 75W-90 maintains a more consistent thickness, or viscosity, across a wide temperature range. It's thicker when exposed to high heat and thinner under colder, wintry conditions than 80W-90.
36 related questions foundWhat is the difference between gear oil and differential oil?
Differential oil, which is also known as gear oil, is thicker compared to engine oil. As a lubricating oil, gear oil prevents vehicles' metallic components from damage and increases their overall performance. The oil also makes it easy for cars to make corners in a hassle-free way.
Can you use 80w90 instead of 75w90?
The oil weight is not a noticeable difference, most if not all 75w90's are synthetic or synthetic blends. 80w90's are dino oil. I would think your oil change interval would be reduced by half, so 50k miles instead of 100k. 80w90 should be safe to use, and you won't notice a difference.
Is 80w90 mineral oil?
Gear Oil 80W-90 is a premium mineral automotive gear oil manufactured with modern extreme pressure additives and friction modifiers, meeting the requirements of API GL-5/6 and MT-1, as well as many other manufacturer specifications.
Is 80w90 same as SAE 90?
Can I use SAE 80W-90 instead of SAE 90w? Yes it is the same… close enough anyway. SAE 90 gear oil is equivalent to 50wt engine oil (SAE 80 = 30wt), so you could always dump that in instead if you want.
What is 90w gear oil?
SAE 90 MINERALGEAR LUBRICANT
Phillips 66® Transmission Oil SAE 90 is an SAE 90 mineral oil gear lubricant recommended for use in manual transmissions, transfer cases and rear axle assemblies of automotive, farm and off-highway equipment where the manufacturer specifies an API GL-1 gear oil.
Is 80W the same as 10w40?
The most common mistake is the belief that the viscosity of SAE 80W gear oil is much thicker than the viscosity of SAE 10W-40 motor oil. This is absolutely incorrect! A 10W-40 motor oil's viscosity is actually similar to the viscosity of 80W gear oil, and the viscosity of SAE 10W-30 is similar to 75W gear oil.
What is hypoid gear lube?
A hypoid gear oil is a lubricant that is designed to operate effectively with hypoid gear designs. Most gearboxes and differentials use hypoid gear designs and the lubricant must contain EP (extreme pressure) additives to prevent wear between the sliding surfaces of a hypoid gear mesh.
Can you mix synthetic and regular gear oil?
Yes. There is no danger mixing synthetic and conventional motor oil. However, conventional oil will detract from the superior performance of synthetic oil and reduce its benefits.
What do the numbers on gear oil mean?
The number indicates a level of the oil viscosity at a particular temperature. The higher the grade number, the higher the oil viscosity. Viscosity of gear oils designated with a number only without the letter “W” (SAE 80, SAE 90, SAE 140 etc.)
What is the difference between gl4 and gl5 gear oil?
GL-4 is suitable for hypoid gear service when they are under severe service but are without shock loading. GL-5 is suitable for hypoid gear service under severe service and shock loads and not for use in a gearbox.
What is equivalent to SAE 90 gear oil?
An SAE 90 gearbox oil is roughly the same viscosity as an SAE 50 engine oil. Most manufacturers now offer EP80W/90 oils in place of both EP80 and EP90.
What is SAE 80?
RAVENOL Multipurpose Gear Oil SAE 80 GL-4 is a EP (extreme pressure) gear oil designed for manual transmissions, distributor transmissions, steering transmissions, as well as normal loaded axle drives.
What oil do I put in my diff?
There are two types of differential fluid. One is mineral oil, which is a natural, crude oil-based fluid. The other is synthetic differential fluid, which is created in a lab. As with all synthetic oils, synthetic differential fluid oils can be fine-tuned for optimal performance.
What oil goes in a Dana 20 transfer case?
The transfer case needs gear oil. 85w-90 is typical but a lighter weight like 75w-90 can be used in colder climates or 85-140 or similar can be used in hotter climates.
Can I mix gear oils?
Mineral oils, PAOs and esters may all be mixed together. Only polyglycol type synthetic oils (PG or PAG) may not be mixed with the other lubricant types. They can react together and form gum gels in the casings. Furthermore, they can sometimes be incompatible and immiscible with other polyglycols.
Is Thicker gear oil better?
Thicker gear lubes provide better shock absorption at the gear face and prevent spooning or cupping gear teeth. Some gear lube manufacturers have started to offer 75W-110 in order to provide better protection when pulling heavy loads without sacrificing as much fuel efficiency as 75W-140.
What happens if you never change differential fluid?
Most differentials need a fluid change at about 50,000 miles. If left too long or if the fluid starts to run low, the differential will become noisy and can eventually fail. If that happens, the gears can seize, locking up the rear wheels and potentially causing a lot of damage or even an accident.
