AMSOIL V-Twin Motorcycle Oil | Built for Harleys, Made for the Miles
AMSOIL V-Twin Motorcycle Oil | Built for Harleys, Trusted by Riders and Dealers
AMSOIL V-Twin Motorcycle Oil is engineered for the extreme heat, pressure, and punishment dished out by American V-twin engines. Whether you're riding a Harley-Davidson, Indian, or Victory — or running a busy bike shop — this oil is built to outperform.
It's not just one of the most tested oils in the industry. It's the Official Oil of Daytona Bike Week, Laconia Motorcycle Week, and Sturgis.
The Problem with Typical V-Twin Oils
V-twin engines run hot, especially in traffic, high RPM, or long-haul riding. Many stock oils — including Harley SYN3 — struggle to hold viscosity under stress, leading to:
- Gear whine and clutch chatter
- Harsh shifts and excessive wear
- Reduced engine life
- Accelerated sludge and varnish
AMSOIL doesn't just meet spec. It obliterates it.
✅ Why AMSOIL V-Twin Oil Wins
• Withstands extreme heat without thinning
• Resists shear and maintains viscosity better than SYN3¹
• Prevents slippage and glazing for longer clutch life
• Handles all three sumps: engine, transmission, primary
• Backed by Warranty Secure™ and the AMSOIL Limited Warranty
¹Based on CEC L45-KRL shear stability testing vs Screamin' Eagle SYN3
Which Oil Should You Use?
| Product Name | Viscosity | Code | Primary Fit |
|---|---|---|---|
| 20W-50 Synthetic V-Twin Oil | 20W-50 | MCV | Most Harley-Davidson models (all 3 sumps) |
| SAE 60 Synthetic V-Twin Oil | SAE 60 | MSV | Classic Harleys – Knucklehead, Panhead, Shovel |
| 15W-60 Synthetic V-Twin Oil | 15W-60 | MFF | Indian Scout, Victory Octane |
| 20W-40 Synthetic V-Twin Oil | 20W-40 | MVI | Most Victory and Indian motorcycles |
| Synthetic V-Twin Transmission Fluid | SAE 110 (gear) | MVT | Dedicated straight-grade gear lube for Harley transmission sump |
| Synthetic V-Twin Primary Fluid | MVP | Dedicated primary chaincase sump (Harley) |
One Oil or Three?
AMSOIL 20W-50 is shear-stable and designed to perform in the engine, transmission, and primary. But if you prefer dedicated fluids:
- Use **MVT** in the transmission for quieter shifts and gear protection
- Use **MVP** in the primary for better clutch feel and cold-start engagement
Both options offer slight performance improvements — and peace of mind for meticulous riders.
Comparison: AMSOIL vs Screamin' Eagle SYN3
| Test | AMSOIL 20W-50 | Harley SYN3 |
|---|---|---|
| Viscosity Retention (CEC L45-KRL) | 6X better | Baseline |
| Noack Volatility | 4.2% | Higher |
| High Temp Shear (HTHS) | 5.6 cP | Not published |
| Rust Protection (ASTM D1748) | ✅ Pass | ❌ Unknown |
| Clutch Compatibility | JASO MA2 | Not certified |
⚠️ Is SYN3 Certified for Wet Clutch Use?
No. Harley-Davidson's Screamin' Eagle SYN3 is not JASO MA or MA2 certified.
It's marketed as compatible with your engine, transmission, and primary — but it lacks the third-party wet-clutch certification trusted around the world.
Meanwhile, every AMSOIL V-Twin Motorcycle Oil is JASO MA or MA2 certified, meaning:
-
✅ Verified for wet-clutch compatibility
-
✅ Tested to prevent slippage and glazing
-
✅ Safe for long-term clutch health and consistent feel
Bottom line: If it doesn't say JASO MA/MA2 on the label — it's not proven for your clutch.
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Tech Specs (Selected)
| Spec | 20W-50 (MCV) | SAE 60 (MSV) | 15W-60 (MFF) | 20W-40 (MVI) |
|---|---|---|---|---|
| Viscosity @ 100°C (cSt) | 18.5 | 24.9 | — | — |
| Flash Point (°C) | 234 | 226 | — | — |
| Noack Volatility (%) | 4.2 | 3.7 | — | — |
| JASO Spec | MA2 | MA/MA2 | MA | MA |
| Base Number (TBN) | | 11.6 | — | 11.6 | 11.6 |
| Shear Stability (HTHS, cP) | 5.6 | 7.6 | 6.9 | 4.2 |
AMSOIL Synthetic V-Twin Motorcycle Oil Built for Harley, Victory & Indian Riders
At Vyscocity Inc., we don't just sell oil — we supply performance. AMSOIL Synthetic V-Twin Motorcycle Oil is engineered for riders who demand maximum protection, power, and peace of mind. This isn't a repurposed car oil — it's built from the ground up for the heat, stress, and RPMs of big V-twin engines.
Tested and proven in extreme temperatures, AMSOIL V-Twin oil delivers:
✅ Stable viscosity under heat (no thinning)
✅ Wet-clutch safe friction balance
✅ Gear and chain wear protection
✅ Rust and corrosion defense during storage
Whether you ride a Harley-Davidson, Indian, or Victory, this is the last oil brand you'll ever need.
🔗 Use our Harley Oil Lookup Tool to find exactly what your bike calls for.
Compared to Harley SYN3 and Royal Purple V-Twin, AMSOIL delivers superior high-temp durability, quieter gear shifts, and longer drain intervals — tested and trusted by hardcore riders.
Rider Personas
Harley-Davidson Riders
Harleys run hot — especially in summer traffic, high-RPM cruising, or city stoplights. AMSOIL 20W-50 is built to handle it all. It protects your engine, transmission, and primary with one oil. Riders report smoother shifts, quieter operation, and longer clutch life. And in dyno testing, it held viscosity 6X better than Harley SYN3¹ — which means better wear control and performance you can feel.
Indian Motorcycle Owners
Indian riders know the value of American-made quality. But most Indian oils are semi-synthetic. AMSOIL offers full-synthetic alternatives: 20W-40 for most Indian bikes, and 15W-60 for Scouts. Both meet API SM and JASO MA standards, protect catalytic converters, and reduce heat under load. They're ideal for upgraded engines, slow rally rides, and anyone who wants peace of mind between oil changes.
Victory Enthusiasts
Victory motorcycles have loyal riders — and almost no high-quality oil options. AMSOIL is one of the few brands offering full-synthetic 15W-60 and 20W-40 oils that meet Victory's specs. These oils resist shear, run cooler, and provide consistent clutch feel. If you're tired of running 20W-50 and hoping it's “close enough,” this is your real match.
High-Mileage Commuters
Racking up 5,000, 10,000, even 20,000 miles a year? AMSOIL is built for long-haul riders. It resists viscosity breakdown over time, controls deposits, and protects against rust during winter layups. It's engineered for up to 2X OEM drain intervals — especially when used with AMSOIL EA filters — and it passes the ASTM D1748 humidity cabinet rust test.
Tourers and Cross-Country Riders
You ride across borders and time zones — your oil should keep up. AMSOIL handles the load, the heat, and the slow crawl through rally traffic without thinning out. It maintains performance in high-altitude twisties, parade routes, and back-to-back 500-mile days. Plus, it's the Official Oil of Sturgis, Daytona, and Laconia — so you know it's road-tested and rally-proven.
Riders Who Prefer Dedicated Transmission Fluid
Some riders don't want one oil for everything. AMSOIL Synthetic V-Twin Transmission Fluid (MVT) is a straight SAE 110 gear lube formulated just for Harley transmissions. It delivers quieter shifts, eliminates harsh engagement noise, and protects gears from shock loading. For riders who want maximum feel and gear longevity, this dedicated option is a smart upgrade from all-in-one oils.
If you're serious about protection, AMSOIL gives you the edge.
Dealer & Retailer Opportunities
Run a bike shop? AMSOIL V-Twin is a great way to add value and margin:
- No need to stock Harley oil
- Display AMSOIL as an American-made, rally-backed premium option
- Capture riders who've been burned by thin, noisy, or hot-running oil
- Use our Retail Co-op Program for signage and display support
Order Online or In Bulk
We stock single quarts, full oil change kits, pails, and 55-gallon drums.
Want to resell or install AMSOIL in your shop?
Become a dealer
Looking for volume pricing?
Try a commercial or retail account
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SAE 60 Synthetic V-Twin Motorcycle Oil
High-Performance Lubrication for Motorcycle Engines and Transmissions
SAE 60 Synthetic Motorcycle Oil is a premium oil designed for people who demand the absolute best lubricants for their motorcycles. The result of considerable research, it is specially designed to excel in all areas that are specific to motorcycles. Comprising high engine RPM, wet-clutch lubrication and more.
Product code : MCS
*NOT AVAILABLE IN CANADA*
20W-50 Synthetic V-Twin Motorcycle Oil
High-Performing Lubricant for Engines, Transmissions and Primary Chaincases
Innovative multi-functional formula for both domestic and foreign motorcycles. Outstanding in air-cooled motorcycle engines due to extreme temperature performance. May be used in engines, transmissions and the primary chaincase. Not recommended where an API GL-4 or GL-5 gear oil is required.
API Service SG, SL/CF, CG-4 • JASO MA/MA2 (motorcycle wet clutch) • ISO-L-EMA2
Product code : MCV
20W-40 Synthetic V-Twin Motorcycle Oil
Created by AMSOIL for use in Victory * and Indian* Motorcycles
AMSOIL Synthetic V-Twin Motorcycle Oil is a quality oil. It is designed for those that require the absolute best lubrication for their motorcycles. It is the outcome of extensive research and has been specifically designed to excel in all areas exclusive to motorcycles. This includes the extreme temperatures of air-cooled engines, wet-clutch lubrication, extreme-pressure areas of gears and chains, and protection against rust.
Product code : MCI
15W-60 Synthetic V-Twin Motorcycle Oil
Developed by AMSOIL for use in Victory * and Indian* Motorcycles
AMSOIL Synthetic V-Twin Motorcycle Oil is a quality oil. Designed for people who request absolutely the best lubricant for their motorcycles. It is the result of extensive study and is specifically designed to excel in all areas unique to motorcycles. This includes the high temperatures of air-cooled engines, wet-clutch lubrication, severe-stress areas of gears and chains, and rust protection.
Product code : MSV
Synthetic V-Twin Transmission Fluid
AMSOIL Synthetic V-Twin Transmission Fluid is designed specifically for the bikers. Especially for those who favor a devoted transmission fluid over a multi-use lubricant.
Product code : MVTQT-EA
Synthetic V-Twin Primary Fluid
AMSOIL Synthetic V-Twin Primary Fluid is purpose-built for bikers who prefer a devoted primary chaincase lubricant.
Product code : MVP
V-Twin Oil Change Kit (HDCK)
Combines everything required to perform an AMSOIL oil change on most 1999-2016 Harley-Davidson* motorcycles in a single package. Contains four quarts of AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil, one chrome AMSOIL Motorcycle Oil Filter and one drain-plug O-Ring.
Product code : HDCK-EA
AMSOIL V-Twin Motorcycle Kit (HDBK)
Combines everything necessary to perform an AMSOIL oil change on most 1999-2016 Harley-Davidson* motorcycles in one convenient package. Contains four quarts of AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil, one black AMSOIL Motorcycle Oil Filter and one drain-plug O-Ring.
Product code : HDBK-EA
V-Twin Oil Change Kit (HDMC)
Combines everything necessary to conduct an AMSOIL oil change on most 2016-present Harley-Davidson* motorcycles in one convenient package. Comprises five quarts of AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil, one chrome AMSOIL Motorcycle Oil Filter and one drain-plug O-Ring.
Product code : HDMC-EA
V-Twin Oil Change Kit (HDMB)
Combines all needed to perform an AMSOIL oil change on most 2016-present Harley-Davidson* motorcycles in a single package. Contains five quarts of AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil, one black AMSOIL Motorcycle Oil Filter and one drain-plug O-Ring.
Product code : HDMB-EA
Frequently Asked Questions About AMSOIL V-Twin Oil
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