What Kind Of Oil Goes In Harley Primary?

The Harley-Davidson company recommends using SAE 50 or SAE 60 motor oil in its motorcycles’ primary drive systems. The Society of Automotive Engineers (SAE) created a system to grade motor oils according to their viscosity, or thickness. Oils with a higher viscosity, such as SAE 60 oil, are thicker and better at lubricating than thinner oils like SAE 50.

What Kind Of Oil Goes In Harley Primary?

If you’re a Harley rider, then you know that one of the most important things to keep in mind is what kind of oil goes in your primary. There are a lot of different oils out there on the market, and it can be tough to decide which one is best for your bike.

However, we’ve got you covered. In this blog post, we’ll go over what kind of oil goes in a Harley primary, and why it’s so important to use the right type. As any Harley rider knows, your primary oil plays a big role in keeping your bike running smoothly.

It helps to lubricate all of the moving parts inside your engine, and it also helps to keep things cool by dissipating heat. That’s why it’s so important to use the right type of oil in your primary; using the wrong type can lead to serious problems down the road. So, what kind of oil should you use in your Harley primary?

The answer may surprise you: synthetic oil is actually best for most riders. Synthetic oil has a number of advantages over traditional petroleum-based oils; it resists breakdown better at high temperatures, flows more easily at low temperatures, and provides better overall protection for your engine components.

If you’re looking for the best possible performance from your Harley, synthetic oil is definitely the way to go.

Is Harley Primary Oil the Same As Engine Oil?

Harley-Davidson’s primary oil is different from the engine oil in a few key ways. The most notable difference is that Harley’s primary oil is designed to lubricate the transmission, while engine oil lubricates the engine.

Harley-Davidson recommends using their primary oil in all models except for Twin Cam engines, which require a special synthetic blend. Another key difference is that Harley’s primary oil has a higher viscosity than engine oil, meaning it is thicker and will take longer to drain out of the system.

Can I Use Gear Oil in My Harley Primary?

If you’re a Harley owner, you’ve probably heard of using gear oil in the primary. But what is it and why would you use it? Gear oil is a type of lubricant that’s specifically designed for use in gearboxes. It’s thicker than engine oil and has special additives that help protect gears from wear and tear.

So, why would you use gear oil in your Harley primary? There are a few reasons. First, if your bike has been making noise or leaking oil, gear oil can help quiet things down and seal up any leaks. Second, it can help prolong the life of your clutch by providing extra protection against wear and tear.

And third, it can make shifting smoother and more precise. If you’re thinking about using gear oil in your Harley primary, talk to your mechanic first. They’ll be able to tell you if it’s the right choice for your bike based on its condition and how it’s been maintained.

Can You Use Synthetic Oil in Harley Primary?

Yes, you can use synthetic oil in your Harley’s primary drive. However, there are a few things to keep in mind when using synthetic oil on any motorcycle. First, while most modern motorcycles are designed to run on synthetic oil, it’s always best to check your owner’s manual to be sure.

Some bikes still require the use of conventional oil. Second, even if your bike is designed for synthetic oil, you’ll want to avoid mixing it with conventional oil. This can cause all sorts of problems down the road. So if you’re going to switch from conventional to synthetic (or vice versa), make sure you completely drain the old oil before adding new oil. Third, remember that synthetic oil isn’t necessarily better than conventional oil.

It just has different properties. So don’t feel like you need to switch just because everyone else is doing it. If your bike is running fine on conventional oil, there’s no reason to switch. Fourth, if you do decide to switch to synthetic oil, be prepared for a higher price tag.

Synthetic oils cost more than their conventional counterparts but they can last longer and may provide better protection for your engine under extreme conditions. So there you have it! You can definitely use synthetic motor oils in your Harley’s primary drive but there are a few things worth considering first.

What Kind of Oil Do You Put in a Clutch of a Harley-Davidson?

If you have a Harley-Davidson with a clutch, you should put SAE 80W-90 gear oil in the clutch. This type of oil is designed to lubricate the gears and bearings in the transmission and will also help protect against wear.

What is the Best Oil for Harley Primary

If you’re a Harley owner, you know that one of the most important parts of maintaining your bike is keeping the primary oil clean and fresh. But with so many different oils on the market, it can be hard to know which one is best for your bike.

Here’s a quick rundown of some of the most popular oils used in Harley primaries, as well as their pros and cons: – AMSOIL Synthetic 20W-50 Motorcycle Oil: This oil is designed specifically for air-cooled motorcycle engines, like those found in Harley bikes. It’s a fully synthetic oil that contains additives to protect against wear and tear, as well as providing excellent protection against heat.

Pros: Excellent protection against heat and wear; full synthetic formula.

Cons: May be too thick for some bikes; not all Harley mechanics are familiar with it. – Mobil 1 V-Twin 20W-50 Motorcycle Oil: This is another full synthetic option that’s designed specifically for v-twin engines. It provides excellent protection against wear and tear, while also helping to keep your engine cool in hot weather riding conditions.

Pros: Excellent protection against wear and heat; full synthetic formula. 

Cons: Some reports of leaks; may be too thick for some bikes. – Shell Rotella T6 5W40 Full Synthetic Heavy Duty Engine Oil: This oil is designed for both gas and diesel engines, so it’s a good choice if you’re looking for an all-purpose option.

It provides excellent protection against wear, while also helping to keep your engine clean. Pros: Good all-purpose option; helps keep the engine clean; excellent protection against wear.

Can You Use Gear Oil in Harley Primary

Harley-Davidson recommends using their special Primary Chaincase Lubricant, or a quality gear oil with an API service classification of GL-5. This is because the additives in regular gear oil can be harmful to the primary chain and sprockets. Harley also recommends changing the primary oil every 5,000 miles.

What is Primary Oil in a Motorcycle

The primary oil in a motorcycle is the lubricating oil that is used to lubricate the engine. It is usually made from petroleum or synthetic oil, and it helps to keep the engine clean and running smoothly. Primary oil also helps to protect the engine from wear and tear, and it can help to extend the life of your motorcycle.


The answer to this question is fairly simple – any good quality motorcycle oil will work just fine in Harley’s primary drive. However, there are some oils that are specifically designed for use in motorcycles, and these may provide some additional benefits over regular automotive oils.

Alston Seymour

A Harley-Davidson Motor Company certified Master Technician and avid biker, I love to write about everything and anything related to biking.

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