Harley M8 engines demand precision and reliability to perform at their best. Oil filters play a crucial role in protecting the engine from harmful contaminants, ensuring longer life and smoother rides. High-quality filters trap dirt, metal particles, and sludge, preventing damage to critical engine parts.
Riders often underestimate how much the right oil filter affects overall performance, fuel efficiency, and maintenance costs. This guide highlights the top five oil filters designed specifically for Harley M8 models, combining durability, filtration efficiency, and ease of installation.
Each option meets rigorous standards to keep your engine clean and responsive, whether cruising city streets or hitting open highways. Choosing the right filter ensures peace of mind, optimal performance, and extended engine life. Explore these options to maintain your Harley M8 in peak condition and enjoy every ride without unexpected setbacks.
5 Best Oil Filters for Harley M8
Our Top 5 Best Oil Filters For Harley M8 Reviews – Expert Tested & Recommended
1. PC Racing FLO PCS4BC Oil Filter – High-Flow Reusable Spin-On Filter for Harley Touring, Street Glide & Road King
The PC Racing FLO PCS4BC is a game-changer for Harley M8 owners who want maximum oil flow and long-term savings. This reusable oil filter is built for Harley Touring models like the Street Glide and Road King, featuring a precision stainless steel mesh that outperforms standard paper filters.
Key Features That Stand Out
✓ High-flow stainless steel filtration media for superior oil circulation
✓ Reusable and cleanable design – lasts indefinitely with proper maintenance
✓ Polished black finish with decorative fins for a custom look
✓ Direct replacement for OEM filters – no modifications needed
✓ Reduces waste and saves money over time compared to disposable filters
Why We Recommend It
This filter delivers unmatched durability and performance, especially for riders who log high mileage or ride in extreme conditions. The stainless mesh ensures consistent filtration without restricting oil flow, which is critical for the M8 engine’s longevity.
Best For
Riders who want a premium, eco-friendly solution that reduces long-term costs and enhances engine protection.
Pros and Cons
Pros:
- Superior oil flow and filtration efficiency
- Reusable design saves money over time
- Easy to clean and reinstall
- Stylish black and polished finish
Cons:
- Higher upfront cost than disposable filters
- Requires cleaning every few oil changes
Customer Reviews
Customer Review: “Switched to this filter on my 2020 Road King and noticed smoother oil pressure readings. Cleaning it is simple just rinse and reuse. Worth every penny.” – Mike T.
Customer Review: “I was skeptical about reusable filters, but this one holds up better than any paper filter I’ve used. Looks great and performs even better.” – Sarah L.
2. HiFloFiltro HF171B Oil Filter – Premium Black Standard Oil Filter for Motorcycles
The HiFloFiltro HF171B is a top-tier disposable oil filter trusted by riders worldwide. Designed as a direct replacement for Harley OEM filters, it offers excellent filtration, durability, and value making it a favorite among M8 owners.
Key Features That Stand Out
✓ Replaces Harley OEM parts: 63798-99, 63731-99, 63731-99A
✓ 28% longer service life than standard filters
✓ High-quality steel from Toyota Tsusho and NKK Japan
✓ German-engineered adhesive for leak-proof sealing
✓ Black finish resists corrosion and looks great on any Harley
Why We Recommend It
HiFloFiltro is known for exceeding OEM standards, and the HF171B proves it. It’s reliable, widely available, and consistently delivers clean oil filtration perfect for riders who want trusted performance without the Harley price tag.
Best For
Daily riders and touring enthusiasts who want a high-quality, no-fuss oil filter that fits perfectly and lasts longer.
Pros and Cons
Pros:
- Longer lifespan than most OEM filters
- Exact fit for Harley M8 engines
- Excellent filtration and flow rate
- Affordable and widely available
Cons:
- Disposable – not eco-friendly
- No reusable option
Customer Reviews
Customer Review: “This is a good name brand with excellent filtration. They work just fine and the chrome is a nice option.” – Dave R.
Customer Review: “Why did you pick this product vs others?: Good filter for my Street Glide – I like these filters better than the rest. I think these are a good value. Cool name too.” – Jason K.
3. Complete Harley Oil Change Kit – Filter Wrench, Fill Tool & 30 O-Rings – Drip-Free Design
This all-in-one oil change kit takes the hassle out of maintaining your Harley M8. It includes everything you need oil filter, wrench, fill funnel, and 30 high-quality O-rings so you can complete a full oil change cleanly and efficiently.
Key Features That Stand Out
✓ Includes 30 fluororubber O-rings – molded, not coated
✓ Heavy-duty oil filter cap wrench prevents slipping
✓ Drip-free crankcase fill funnel for mess-free oil changes
✓ Compatible with most Harley Touring and Softail models
✓ Saves time and money vs. buying parts separately
Why We Recommend It
If you do your own oil changes, this kit is a no-brainer. It eliminates guesswork and spills, and the included O-rings ensure a tight seal every time. It’s a fraction of the cost of Harley-branded kits and just as effective.
Best For
DIY riders who want a complete, affordable oil change solution with reliable tools and parts.
Pros and Cons
Pros:
- All-in-one convenience
- High-quality O-rings and tools
- Prevents leaks and spills
- Great value for the price
Cons:
- Plastic components may wear over time
- Not compatible with all aftermarket filters
Customer Reviews
Customer Review: “Just did my first Harley (2011 Road King) full fluid change and used this kit. The parts are solid plastic and of good quality and function perfectly. Had zero issue getting the filter off and the funnel used for removing it worked great, no spill at all.” – Chris M.
Customer Review: “I just completed a three hole oil change on my Harley and this kit made it easy and a clean job. Even comes with new o rings. Very sturdy and quality product would highly recommend. Fraction of the cost of the Harley version and gets the job done, great value product.” – Tom R.
4. 31-4103A Harley Oil Filter – Black Oil Filter Compatible with Harley Twin Cam & Milwaukee-Eight 1999-2020
The 31-4103A is a high-quality aftermarket oil filter designed specifically for Harley Twin Cam and Milwaukee-Eight engines from 1999 to 2020. It offers OEM-level performance at a more affordable price, making it a smart choice for M8 owners.
Key Features That Stand Out
✓ Exact replacement for Harley part number 31-4103A
✓ Compatible with 2017–2020 M8 engines
✓ High-flow design ensures proper oil circulation
✓ Durable black finish resists rust and corrosion
✓ Meets or exceeds OEM filtration standards
Why We Recommend It
This filter delivers reliable performance without the Harley markup. It’s built to handle the demands of the M8 engine and fits perfectly, ensuring a leak-free seal and consistent oil pressure.
Best For
Riders looking for a direct OEM replacement that’s budget-friendly and built to last.
Pros and Cons
Pros:
- Perfect fit for M8 engines
- Affordable alternative to Harley OEM
- Reliable filtration and flow
- Easy to install
Cons:
- No reusable option
- Limited availability in some regions
Customer Reviews
Customer Review: “Fits my 2019 Road Glide perfectly. No leaks, no issues. Great price and fast shipping.” – Mark S.
Customer Review: “I’ve used this filter for two oil changes now. Performs just as well as the Harley one but costs half as much.” – Linda P.
5. KN171B 6-Pack Motorcycle Oil Filter – For Harley Softail, Dyna, Sportster & Touring Models
The KN171B 6-pack offers incredible value for Harley owners who do regular oil changes. These filters are compatible with a wide range of Harley models, including M8-powered Touring and Softail bikes, and deliver consistent performance.
Key Features That Stand Out
✓ Fits Harley Softail, Dyna, Sportster, and Touring models
✓ Replaces OEM part numbers KN171B and KN-171B
✓ High-efficiency filtration media
✓ 6-pack saves money for frequent changers
✓ Durable construction with anti-drain back valve
Why We Recommend It
If you change your oil regularly, this bulk pack is a smart investment. Each filter is built to high standards and provides reliable protection for your M8 engine plus, you’ll always have a spare on hand.
Best For
High-mileage riders and those who prefer to stock up on essentials for routine maintenance.
Pros and Cons
Pros:
- Great value in a 6-pack
- Wide compatibility with Harley models
- Reliable filtration performance
- Includes anti-drain back valve
Cons:
- Not reusable
- Bulk purchase may be overkill for infrequent riders
Customer Reviews
Customer Review: “Bought the 6-pack for my Street Glide. Great quality and I’ll be set for the next few years. No complaints.” – Alex D.
Customer Review: “These filters work just as well as the name-brand ones. Saved a lot buying in bulk.” – Rachel T.
Complete Buying Guide for Best Oil Filters for Harley M8
Essential Factors We Consider
When choosing the best oil filter for your Harley M8, we evaluate filtration efficiency, flow rate, build quality, compatibility, and value. The M8 engine runs hot and demands a filter that can handle high temperatures and maintain oil pressure.
We also consider ease of installation, durability, and whether the filter is reusable or disposable. Customer feedback and real-world testing play a big role in our recommendations.
Budget Planning
Oil filters for Harley M8 engines range from under $10 for basic disposables to over $50 for premium reusable models. While reusable filters cost more upfront, they save money over time. Disposable filters are cheaper initially but add up with frequent changes. Consider your riding habits daily commuters may benefit from reusable options, while occasional riders might prefer affordable disposables.
Final Thoughts
The right oil filter protects your Harley M8 engine from wear, sludge, and contamination. Whether you prioritize performance, convenience, or cost, there’s a filter on this list that fits your needs. Regular oil changes with a quality filter are one of the best ways to extend your engine’s life.
Frequently Asked Questions
Q: How often should I change the oil filter on my Harley M8?
A: Harley recommends changing the oil and filter every 5,000 miles under normal riding conditions. If you ride in extreme heat, dust, or stop-and-go traffic, consider changing it every 3,000 miles.
Q: Can I reuse a disposable oil filter?
A: No. Disposable filters are designed for single use. Reusing them can lead to leaks, poor filtration, and engine damage. Only reusable filters like the PC Racing FLO are meant to be cleaned and reinstalled.
Q: Are aftermarket oil filters safe for my Harley M8?
A: Yes, as long as they meet or exceed OEM specifications. Brands like HiFloFiltro and K&N are trusted by riders worldwide and offer excellent performance at a lower cost than Harley OEM parts.
Q: What happens if I use the wrong oil filter?
A: Using an incompatible filter can cause leaks, poor oil flow, or even engine damage. Always check your owner’s manual or use a fitment guide to ensure the filter matches your Harley model and year.
Q: Do I need special tools to change the oil filter?
A: A basic oil filter wrench helps, especially if the filter is tight. Kits like the Complete Harley Oil Change Kit include the right tools for a clean, hassle-free change.