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Harley M8 Oil Capacity Guide (All Sizes Explained)

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Rev up your knowledge with our in-depth guide on the true Harley M8 oil capacity. If you’re a proud owner of a Harley M8 or simply an enthusiast, it’s essential to understand its intricacies to ensure its longevity and optimal performance. This article spells out everything you need to know about the varying oil capacities of Harley M8s and the ins and outs of maintaining them. We’ll break down the general principles, explore common misconceptions, and, of course, answer the burning question: What exactly are the oil capacities for all sizes of Harley M8 engines? But this article goes beyond mere numbers; it is as much about the spirit of motorcycle maintenance as it is about the specifics. So, from novices to seasoned bikers, settle into your saddle and prepare for the ride. Let’s navigate the highway of knowledge together and keep your Harley M8 running smoothly, just as it was born to do!

Looking for the primary? Harley M8 Primary Oil Capacity (All Engine Sizes Explained)
And you might need this for later: The Best Oil for M8 Harley Engines Gets Revealed (Complete)


107ci Milwaukee Eight engine from Harley Davidson

What Is The Specific Oil Capacity For The Harley M8 107 Engine?

Why Is There Community Confusion?

When it comes to the oil capacity of Harley M8 engines, especially the 107 model, there’s a bit of a debate. The owner’s manual typically suggests an initial fill of around 4 quarts of oil. However, many riders have found that after a ride and a proper check, their engines comfortably accommodate up to 4.5 quarts to reach the optimal level. This discrepancy often stems from factors like residual oil not fully drained or the use of aftermarket parts that might alter the engine’s oil capacity.

Which Oil Type Is Recommended Specifically For The M8 107 Engine?

The recommended oil type for the M8 107 engine is high-quality synthetic motor oil, ideal for maintaining optimal engine performance and longevity. Synthetic oils offer better engine protection, especially during high-temperature operation, and can also improve fuel efficiency.

What Weight?

The ideal oil weight for ensuring the Harley M8 107 engine’s peak performance is 20W-50. This weight is suitable for a broad range of operating temperatures, making it perfect for most riding conditions.

What Brand(s)?

Top brands like Amsoil, Mobil 1, and Maxima manufacture the best synthetic oil, highly recommended for the Harley M8 107 engine.

How Often Should Oil Be Changed In The Harley M8 107 Engine?

For optimal engine performance and longevity, it’s crucial to adhere to the recommended oil change interval for the M8 107 engine, approximately every 5,000 miles, as outlined in the owner’s manual. However, this frequency can vary based on your riding conditions and style. Always refer to your owner’s manual for the most accurate information.

Are There Unique Signs Of Low Oil Specific To The M8 107 Engine?

Like any engine, the M8 107 engine will exhibit certain signs when the oil level is low. These may include increased engine noise, overheating, reduced performance, or even a burning smell. If you notice any of these signs, it’s best to check the oil level immediately.

Is The Oil Check Procedure Different For The Harley M8 107 Compared To Other Models?

The oil check procedure for the M8 107 engine is similar to other Harley models. Ensure your Harley is in an upright and level position, then follow the precise steps to check the oil level using the dipstick, a crucial routine for maintenance. The oil level should be between the “Add” and “Full” marks on the dipstick.

Example of the 114ci Milwaukee Eight engine from Harley Davidson

Moving on to the Harley M8 114 engine, understanding the correct oil capacity and maintenance practices can significantly impact your motorcycle’s performance and lifespan.

What’s The Proper Harley 114 Oil Capacity?

Does The Harley M8 114 Require A Specific Type Of Oil?

The M8 114 engine, like the 107, performs best with synthetic motor oil. High-grade synthetic oil offers unmatched protection against heat and wear, essential for the Harley M8 engine’s durability, allowing your engine to operate smoothly and efficiently for some time to come.

What Weight?

For the Harley M8 114 engine, a 20W-50 weight oil is recommended to ensure maximum protection and efficiency under various conditions. This weight provides excellent protection across various operating temperatures.

What Brand(s)?

Top-rated brands like Amsoil, Mobil 1, and Maxima are celebrated for producing the highest quality synthetic oils, perfect for Harley M8 engines, making them suitable choices for the M8 114 engine.

What Is The Recommended Oil Change Interval For The M8 114 Engine?

Following the recommended oil change interval of around 5,000 miles is vital for the Harley M8 114 engine’s peak performance and longevity. However, this can vary based on the specific model of your motorcycle and your riding habits. Always refer to the owner’s manual for the most accurate information.

How To Properly Check The Oil Level In A Harley M8 114 Engine?

Checking the oil level in your Harley M8 114 engine is a straightforward yet essential process for optimal engine maintenance. With the motorcycle in an upright and level position, remove the dipstick, wipe it clean, reinsert it, then remove it again to check the oil level. The oil level should be between the “Add” and “Full” marks on the dipstick.

What Are The Effects Of Oil Overfill In The Harley M8 114 Engine?

Overfilling the oil in your M8 114 engine can lead to critical issues, such as increased oil pressure, oil leakage, and potential damage to engine components, emphasizing the importance of checking the oil level correctly. If you suspect that your engine oil is overfilled, it’s best to consult with a professional or refer to your owner’s manual for guidance.

Example of the 117ci Milwaukee Eight engine from Harley Davidson

Finally, let’s look at the Harley M8 117 engine. This powerful and efficient engine requires proper maintenance and the right oil capacity to function at its best.

What’s The Maximum Harley 117 Oil Capacity?

What Type Of Oil Is Best Suited For The M8 117 Engine?

As with the other M8 engines, opting for premium synthetic oil is the best choice for enhancing the Harley M8 117 engine’s performance and longevity. Synthetic oil offers superior protection against heat and wear, ensuring your engine performs optimally.

What Weight?

A 20W-50 weight oil is ideal for the Harley M8 117 engine, ensuring optimal lubrication and protection across various temperatures. This weight offers excellent protection in a wide range of operating temperatures.

What Brand(s)?

Brands such as Amsoil, Mobil 1, and Maxima are recommended for their high-quality synthetic oils. These brands are well-regarded in the motorcycling community, making them excellent choices for your M8 117 engine.

How Frequently Should The Oil Be Changed In The M8 117 Engine?

To maintain the Harley M8 117 engine at its best, adhere to the recommended oil change interval of around 5,000 miles. However, this can vary based on riding conditions and riding style. Always refer to your owner’s manual for the most accurate information.

What Are The Indications Of Low Oil In The Harley M8 117 Engine?

Signs of low oil in the M8 117 engine can include increased engine noise, overheating, reduced performance, and a burning smell. If you notice any of these signs, it’s best to check the oil level immediately.

Is There A Specific Method For Checking Oil In The Harley M8 117?

The process for checking the oil in an M8 117 engine is similar to other Harley models. With the motorcycle in a level and upright position, remove the dipstick, wipe it clean, reinsert it, and then remove it again to check the oil level. The oil level should be between the “Add” and “Full” marks on the dipstick.

Regardless of this information, understanding the correct oil capacity for your Harley M8 engine is crucial for maintaining its performance and longevity. Always refer to your owner’s manual or consult with a professional for the most accurate information. Happy riding!

Read next: The Best Oil For Harley Davidson Motorcycles Gets Revealed

What Happens If You Overfill The Oil on a Harley M8 Engine?

Overfilling the oil in your Harley M8 engine can lead to a messy problem known as “oil puking.” Excess oil can be forced out through the engine’s breather system, contaminating the air filter and leaving oil residue on your bike’s exterior. This issue arises because overfilling increases crankcase pressure, pushing oil where it doesn’t belong.

How To Deal With an Overfilled Engine

If you suspect your engine has too much oil, take action to avoid the mess and potential damage:

  • Drain the Excess: Safely remove the excess oil by opening the drain plug slightly or using a syringe through the oil fill hole. Aim to keep the oil level within the recommended range on the dipstick.
  • Monitor After Adjustments: After adjusting the oil level, monitor your bike closely on the next few rides. Check the air filter for signs of oil and keep an eye on the dipstick level.

How Much Oil Goes in a M8?

For a Harley M8 engine, the oil capacity typically ranges from 4 to 4.5 quarts. However, this can vary based on specific models and configurations. It’s always best to refer to the owner’s manual of your particular motorcycle for the most accurate information.

How Much Oil Does a 2023 Harley M8 Take?

A 2023 Harley M8 generally requires around 4 to 4.5 quarts of oil. As with any vehicle, the exact amount can depend on the model and any aftermarket modifications. Consult the 2023 model’s manual for precise oil capacity details.

How Much Oil Does a Harley Engine Hold?

The oil capacity of a Harley engine varies by model and engine type. On average, Harley engines can hold between 3 to 4 quarts of oil. For the most accurate information, it’s essential to check the owner’s manual for your specific Harley model.

What Happens if I Put Too Much Oil in My Harley?

Putting too much oil in a Harley can lead to various issues, including increased pressure, oil leaks, and potential damage to seals and gaskets. Overfilling can also cause the oil to foam, reducing its ability to lubricate effectively, which might lead to engine overheating or mechanical failure. It’s crucial to maintain the correct oil level as specified in the motorcycle’s manual to avoid these problems.