Riding a 2021 Harley Davidson Street Glide isn’t just transportation—it’s a statement. With its iconic design and a 1746cc engine to back it up, this bike isn’t shy about showing off. Keeping that beast running strong isn’t just about the ride; it’s about how you care for it. Understanding the right oil type, oil capacity, and how often to schedule those changes can make all the difference in extending the life of your ride and optimizing its performance.
Power and Precision: The 1746cc Milwaukee-Eight Engine
Your 2021 Harley Davidson Street Glide is powered by the Milwaukee-Eight 107 engine, a V-Twin beauty that symbolizes strength and reliability. It produces 111 ft-lbs of torque and strikes an amazing balance between power and control. With its air/oil cooling system and eight precision-engineered valves, this engine is made to handle long trips on open roads. For an engine of this caliber, proper lubrication isn’t just a suggestion—it’s essential.
The Role of Oil in Your Engine
Oil does more than keep things slick. It regulates temperature, prevents wear on moving components, and traps contaminants. The 2021 Street Glide requires the right oil to maintain its optimal temperature and performance on every ride.
Synthetic vs. Conventional Oil: What’s the Difference?
When it comes to motorcycle oil, the debate between synthetic and conventional is never-ending. Here’s how they really compare:
Synthetic Oils
Synthetic oil is like the top-shelf whiskey of engine lubricants. Its molecular structure is engineered for consistency, meaning every molecule does the job it’s built for—no more, no less. It handles extreme heat, improves fuel efficiency, and minimizes wear over time. Plus, it keeps sludge at bay and lasts longer than conventional oil.
Conventional Oils
Conventional oil, made from refined crude, comes with impurities like sulfur and trace metals that can harm your engine over time. The inconsistency in its molecules can lead to uneven lubrication, especially when running in higher heat or under heavy loads. While it’s functional and cost-effective, it might not provide the same long-term protection for your V-Twin engine.
If performance, protection, and longevity matter, synthetic oil is worth considering, especially for a Harley Davidson Street Glide.
2021 Street Glide Oil Requirements: What You Need to Know
Whether you’re rolling into the shop or tackling an oil change at home, here’s the essential info:
- Oil Type: 20W-50 synthetic motorcycle oil designed for V-Twin engines.
- Oil Capacity: The Street Glide holds between 4.76 to 5.18 quarts, so stock up accordingly.
- Recommended Interval: Harley Davidson recommends oil changes every year or 20,000 miles, whichever comes first, offering high flexibility depending on how often you ride.
Choosing oil specifically formulated to handle the demands of a V-Twin engine ensures smooth performance while protecting crucial components against wear and heat damage.
Oil Comparison: Bel Ray vs. AMSOIL
With many options out there, picking the right oil can feel overwhelming. Let’s look at two standout choices: Bel Ray V-Twin Semi-Synthetic Engine Oil and the AMSOIL V-Twin Oil Change Kit.
Bel Ray V-Twin Semi-Synthetic Engine Oil 20W-50
Key Features:
- Semi-synthetic blend.
- Protects against oxidation and viscosity breakdown.
- Reduces engine wear.
Pros:
- A more affordable option compared to full synthetics.
- Balances performance and cost.
- Keeps internal surfaces clean.
Cons:
- Doesn’t last as long as full synthetic alternatives.
- May require more frequent changes for heavy riders.
AMSOIL 20W-50 Synthetic V-Twin Oil Change Kit
Key Features:
- Full synthetic with enhanced thermal stability.
- Includes five quarts of AMSOIL synthetic oil, a black oil filter, and a drain plug O-ring.
- Designed for all-weather performance.
Pros:
- Superior wear protection in extreme temperatures.
- Prolonged oil life reduces maintenance frequency.
- Optimized for Harley Davidson V-Twin engines.
Cons:
- Higher initial cost.
- Some riders may prefer more customizable options.
Both choices are solid options for your Street Glide, with AMSOIL providing more comprehensive long-term protection for those investing in premium care. Bel Ray remains a cost-effective solution for moderate riding needs.
FAQs About Synthetic Oil
Is synthetic oil better for newer engines?
Yes. Synthetic oil provides consistent lubrication and handles the heat demands of modern engines. It’s great for enhancing durability and efficiency in newer bikes like Your Street Glide.
Can synthetic oil be used in older vehicles?
It depends on the state of the engine seals. In most cases, synthetic oil works well in older bikes, offering improved protection.
What is the oil capacity of the 2021 Harley Davidson Street Glide?
The oil capacity is 4.76 to 5.18 quarts, depending on your specific model configuration.
How often should synthetic oil be changed?
Synthetic oil can last up to 20,000 miles or one year, but always follow Harley Davidson’s guidelines. Frequent riders may need shorter intervals.
Is it safe to switch from conventional to synthetic oil?
Yes. Moving to synthetic oil is safe, but it’s best to fully drain and replace all old oil to avoid mixing the two. Discover the performance and style of the 2021 Harley Davidson Street Glide Special—click here to read the full review on Ultimate Motorcycling.
Final Thoughts
The 2021 Harley Davidson Street Glide isn’t just a motorcycle—it’s a machine that deserves care and attention. Keeping it running like new starts with understanding its oil needs. Synthetic oil, with its consistent performance and durability, is a strong choice for riders who demand the best. Whether you go with AMSOIL’s top-of-the-line kit or the reliable performance of Bel Ray, the most important step is regular maintenance. A well-lubricated engine is a happy engine, and a happy engine keeps you on the road longer. So, gear up, fuel up, and enjoy the ride. For more details on high-performance motor oils, explore: Bel-Rayl here and AMSOIL 20W-50 V-Twin Oil Change Kit here.