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    Harley-Davidson · Indian · Victory · American V-Twin

    AMSOIL V-Twin Motorcycle Oil — The Complete Lineup

    Engine oil in every viscosity from SAE 60 to 15W-60, dedicated transmission and primary fluids, Shock Therapy suspension fluid, complete oil change kits, premium filters, and additives — purpose-built for the heat, vibration, and wet-clutch demands of big twins.

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    Why American V-Twins Need a Purpose-Built Synthetic

    Air-cooled V-Twin engines run hotter than nearly any other engine on the road. They share oil with a wet clutch and, on most bikes, a separate transmission and primary chaincase. AMSOIL synthetic V-Twin lubricants are engineered specifically for these conditions — not adapted from car oil.

    • JASO MA2 & Harley-Davidson HD 360 — wet-clutch safe
    • Runs cooler than petroleum oils in air-cooled engines
    • Protects engine, transmission & primary chaincase
    • Exceptional shear stability resists viscosity breakdown
    • Reduces gear noise & improves shift feel
    • Available in 20W-40, 20W-50, 15W-60 and SAE 60
    • Dedicated primary, transmission & suspension fluids
    • Extended drain capability — fewer oil changes
    • Warranty-safe for Harley-Davidson, Indian & Victory
    • Made in the USA — backed by AMSOIL Limited Warranty

    AMSOIL V-Twin Engine Oil — Four Viscosities

    The flagship AMSOIL V-Twin engine oil family covers every American V-Twin from vintage Shovelheads to the newest Milwaukee-Eight 131. JASO MA2 wet-clutch safe, Harley-Davidson HD 360 approved, and engineered to run cooler than petroleum oil in air-cooled engines.

    Shop AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil
    AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil

    AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil

    The flagship oil for Harley-Davidson and American V-Twin motorcycles. Outstanding wear protection, superior heat resistance, and confident wet-clutch engagement. Approved for engine, transmission, and primary chaincase use in three-hole bikes.

    Viscosities:

    20W-50

    AMSOIL Product Codes:

    • • MCVQT-EA (1 qt)
    • • MCV1G-EA (1 gal)
    • • MCV30-EA (30 gal drum)
    • • MCV55-EA (55 gal drum)

    Specifications:

    • • JASO MA2
    • • API SN
    • • Harley-Davidson HD 360
    • • Wet-clutch safe
    • • Engine / Trans / Primary

    Drain interval: Up to 7,500 mi or annually

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    Shop AMSOIL 15W-60 Synthetic V-Twin Motorcycle Oil
    AMSOIL 15W-60 Synthetic V-Twin Motorcycle Oil

    AMSOIL 15W-60 Synthetic V-Twin Motorcycle Oil

    Heavier-viscosity formula for high-output V-Twins, big-bore kits, high-compression builds, hot climates, and aggressive touring loads. Maintains film strength when oil temperatures climb past 250 °F.

    Viscosities:

    15W-60

    AMSOIL Product Codes:

    • • MSVQT-EA (1 qt)
    • • MSV1G-EA (1 gal)

    Specifications:

    • • JASO MA2
    • • Hot-climate / big-bore / high-compression
    • • Wet-clutch safe

    Drain interval: Up to 7,500 mi or annually

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    Shop AMSOIL 20W-40 Synthetic V-Twin Motorcycle Oil
    AMSOIL 20W-40 Synthetic V-Twin Motorcycle Oil

    AMSOIL 20W-40 Synthetic V-Twin Motorcycle Oil

    Engineered specifically for Indian and Victory motorcycles. Meets the 20W-40 viscosity requirement of modern Indian Thunderstroke and PowerPlus engines while delivering AMSOIL's signature wear protection.

    Viscosities:

    20W-40

    AMSOIL Product Codes:

    • • MVIQT-EA (1 qt)
    • • MVI1G-EA (1 gal)

    Specifications:

    • • JASO MA2
    • • Indian factory recommendation
    • • Victory V-Twin
    • • Wet-clutch safe

    Drain interval: Per Indian / Victory OEM

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    Shop AMSOIL SAE 60 Synthetic V-Twin Motorcycle Oil
    AMSOIL SAE 60 Synthetic V-Twin Motorcycle Oil

    AMSOIL SAE 60 Synthetic V-Twin Motorcycle Oil

    Ultra-heavy single-grade synthetic for vintage Harley-Davidson and American V-Twin engines that originally specified straight 60-weight oil. Ideal for Shovelhead, Panhead, Knucklehead, and Ironhead Sportsters.

    Viscosities:

    SAE 60

    AMSOIL Product Codes:

    • • MCSQT-EA (1 qt)

    Specifications:

    • • Vintage V-Twin (Shovelhead, Panhead, Knucklehead, Ironhead)
    • • Straight 60-weight

    Drain interval: Per vintage OEM service spec

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    Dedicated Transmission & Primary Fluids

    Modern Harley-Davidson Big Twins and Sportsters use three separate sumps — engine, transmission, and primary chaincase. AMSOIL builds a purpose-formulated synthetic for each one for the smoothest shifts, quietest gears, and longest clutch life.

    Shop AMSOIL Synthetic V-Twin Transmission Fluid
    AMSOIL Synthetic V-Twin Transmission Fluid

    AMSOIL Synthetic V-Twin Transmission Fluid

    Dedicated transmission fluid for Harley-Davidson and other V-Twin motorcycles with separate transmission sumps. Promotes quiet operation and enables smoother, more positive shifts.

    AMSOIL Product Codes:

    • • MVTQT-EA (1 qt)
    • • MVT1G-EA (1 gal)

    Specifications:

    • • Harley-Davidson Big Twin / Sportster gearbox
    • • Quieter gear noise
    • • Smoother shift feel

    Drain interval: Up to 15,000 mi or per OEM

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    Shop AMSOIL Synthetic V-Twin Primary Fluid
    AMSOIL Synthetic V-Twin Primary Fluid

    AMSOIL Synthetic V-Twin Primary Fluid

    Purpose-formulated for the primary chaincase in Harley-Davidson and American V-Twin motorcycles. Delivers consistent clutch feel, helps prevent slip, and eases shifts to neutral.

    AMSOIL Product Codes:

    • • MVPQT-EA (1 qt)
    • • MVP1G-EA (1 gal)

    Specifications:

    • • Harley-Davidson primary chaincase
    • • Consistent wet-clutch engagement
    • • Easier shifts to neutral

    Drain interval: Up to 15,000 mi or per OEM

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    Shock Therapy® Suspension Fluid

    100% synthetic suspension fluid for V-Twin and powersports forks and shocks. Resists foaming and shear breakdown so damping stays consistent ride after ride. Two viscosities cover plush street comfort to firmer touring control.

    Shop AMSOIL Shock Therapy® #5 Light Suspension Fluid
    AMSOIL Shock Therapy® #5 Light Suspension Fluid

    AMSOIL Shock Therapy® #5 Light Suspension Fluid

    100% synthetic suspension fluid for shocks and forks. Light viscosity for plush feel, controlled rebound, and consistent damping in cooler temperatures or lighter spring rates.

    Viscosities:

    #5 Light

    AMSOIL Product Codes:

    • • STLQT-EA (1 qt)
    • • STL1G-EA (1 gal)

    Specifications:

    • • Plush fork feel
    • • High viscosity index
    • • Resists foaming and shear
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    Shop AMSOIL Shock Therapy® #10 Medium Suspension Fluid
    AMSOIL Shock Therapy® #10 Medium Suspension Fluid

    AMSOIL Shock Therapy® #10 Medium Suspension Fluid

    Medium-weight 100% synthetic suspension fluid for V-Twin and powersports shocks and forks. Resists foaming and shear breakdown for repeatable damping all season long.

    Viscosities:

    #10 Medium

    AMSOIL Product Codes:

    • • STMQT-EA (1 qt)
    • • STM1G-EA (1 gal)

    Specifications:

    • • Firmer damping
    • • High viscosity index
    • • Resists foaming and shear
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    Complete V-Twin Oil Change Kits

    Everything you need for a clean Harley engine service in one box — four or five quarts of 20W-50 Synthetic V-Twin Oil paired with an AMSOIL premium oil filter (black or chrome) and a drain-plug O-ring. Shipped to your door.

    Shop AMSOIL 20W-50 V-Twin Oil Change Kit (4-Quart, Black Filter)
    AMSOIL 20W-50 V-Twin Oil Change Kit (4-Quart, Black Filter)

    AMSOIL 20W-50 V-Twin Oil Change Kit (4-Quart, Black Filter)

    Complete oil change kit: four quarts of 20W-50 Synthetic V-Twin Motorcycle Oil, an AMSOIL EaOM black premium oil filter, and a drain-plug O-ring. Everything you need for a clean engine service in one box.

    AMSOIL Product Codes:

    • • HDBK-EA

    Specifications:

    • • 4 qt MCV 20W-50
    • • EaOM black premium filter
    • • Drain-plug O-ring
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    Shop AMSOIL 20W-50 V-Twin Oil Change Kit (4-Quart, Chrome Filter)
    AMSOIL 20W-50 V-Twin Oil Change Kit (4-Quart, Chrome Filter)

    AMSOIL 20W-50 V-Twin Oil Change Kit (4-Quart, Chrome Filter)

    Four quarts of 20W-50 Synthetic V-Twin Motorcycle Oil, a polished chrome AMSOIL premium oil filter, and a drain-plug O-ring. Show-quality service in one box.

    AMSOIL Product Codes:

    • • HDCK-EA

    Specifications:

    • • 4 qt MCV 20W-50
    • • Chrome AMSOIL premium filter
    • • Drain-plug O-ring
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    Shop AMSOIL 20W-50 V-Twin Oil Change Kit (5-Quart, Black Filter)
    AMSOIL 20W-50 V-Twin Oil Change Kit (5-Quart, Black Filter)

    AMSOIL 20W-50 V-Twin Oil Change Kit (5-Quart, Black Filter)

    Five quarts of 20W-50 Synthetic V-Twin Motorcycle Oil, an AMSOIL EaOM black premium oil filter, and a drain-plug O-ring. Sized for big-bore touring engines and high-output Big Twins.

    AMSOIL Product Codes:

    • • HDMB-EA

    Specifications:

    • • 5 qt MCV 20W-50
    • • EaOM black premium filter
    • • Big-bore / touring sized
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    Shop AMSOIL 20W-50 V-Twin Oil Change Kit (5-Quart, Chrome Filter)
    AMSOIL 20W-50 V-Twin Oil Change Kit (5-Quart, Chrome Filter)

    AMSOIL 20W-50 V-Twin Oil Change Kit (5-Quart, Chrome Filter)

    Five quarts of 20W-50 Synthetic V-Twin Motorcycle Oil paired with a chrome AMSOIL premium oil filter. Sized for big-bore touring engines and show-quality builds.

    AMSOIL Product Codes:

    • • HDMC-EA

    Specifications:

    • • 5 qt MCV 20W-50
    • • Chrome AMSOIL premium filter
    • • Big-bore / touring sized
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    AMSOIL V-Twin Oil Filters & Octane Boost

    AMSOIL Ea Motorcycle Oil Filters use synthetic media rated for AMSOIL extended drain intervals — sold separately in black or chrome. Pair with Motorcycle Octane Boost to maximize power and stabilize ethanol pump gas in high-compression builds.

    Shop AMSOIL Black Motorcycle Oil Filter (EaOM)
    AMSOIL Black Motorcycle Oil Filter (EaOM)

    AMSOIL Black Motorcycle Oil Filter (EaOM)

    Premium synthetic-media oil filter rated for AMSOIL extended drain intervals. Direct fit for most Harley-Davidson Big Twin and Sportster models. Black powder-coat finish.

    AMSOIL Product Codes:

    • • EAOM103-EA
    • • EAOM134-EA

    Specifications:

    • • Synthetic filter media
    • • Extended drain rated
    • • Black powder-coat
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    Shop AMSOIL Chrome Motorcycle Oil Filter (EaOMC)
    AMSOIL Chrome Motorcycle Oil Filter (EaOMC)

    AMSOIL Chrome Motorcycle Oil Filter (EaOMC)

    Same premium synthetic filtration as the EaOM with a polished chrome finish for show-quality builds and custom engines.

    AMSOIL Product Codes:

    • • EAOMC103-EA
    • • EAOMC134-EA

    Specifications:

    • • Synthetic filter media
    • • Extended drain rated
    • • Polished chrome
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    Shop AMSOIL Motorcycle Octane Boost
    AMSOIL Motorcycle Octane Boost

    AMSOIL Motorcycle Octane Boost

    Maximizes power and improves throttle response in V-Twin engines, especially high-compression and modified builds. Reduces engine knock and stabilizes ethanol-blended pump gas.

    AMSOIL Product Codes:

    • • MOBCN-EA (4 fl oz)

    Specifications:

    • • Reduces engine knock
    • • Improves throttle response
    • • Stabilizes ethanol pump gas
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    V-Twin Application Selector

    Match your V-Twin to the recommended AMSOIL engine oil and drivetrain fluids. For exact part numbers by year, make, and model, also see the AMSOIL Motorcycle Lookup tool.

    ApplicationRecommended AMSOILDrain IntervalNotes
    Harley-Davidson Milwaukee-Eight 107 / 114 / 117 / 13120W-50 (MCV) — engine, trans, primaryEngine 5–7,500 mi · Trans/Primary 15,000 miJASO MA2 + HD 360. Use 15W-60 (MSV) in extreme heat or for stage builds.
    Harley-Davidson Twin Cam 88 / 96 / 103 / 11020W-50 (MCV) — three-holeEngine 5–7,500 mi · Trans/Primary 15,000 miFlagship lubricant for Twin Cam Big Twins.
    Harley-Davidson Sportster (Evo 883 / 1200, RH 975/1250)20W-50 (MCV)Engine 5,000 mi · Primary 15,000 miUse Trans Fluid (MVT) in Revolution Max RH gearbox.
    Harley-Davidson Touring — hot climate / loaded / towing15W-60 (MSV)Engine 5–7,500 miHeavier film strength when oil temps exceed 250 °F.
    Indian Thunderstroke 111 / 11620W-40 (MVI)Per Indian OEM serviceMeets Indian 20W-40 factory viscosity recommendation.
    Indian PowerPlus 108 / Victory Freedom V-Twin20W-40 (MVI)Per Indian / Victory OEMIndian Challenger, Pursuit, Victory Cross Country & Vision.
    Vintage HD — Shovelhead, Panhead, KnuckleheadSAE 60 (MCS)Per vintage OEMStraight 60-weight synthetic for engines spec'd before multi-grade.
    Vintage HD Ironhead Sportster (1957–1985)SAE 60 (MCS) or 20W-50 (MCV)Per OEMUse SAE 60 if owner's manual specifies straight-weight.
    Custom V-Twin — S&S, Ultima, RevTech20W-50 (MCV) or 15W-60 (MSV)Per builder specPick 15W-60 for big-bore or high-compression stage kits.
    Buell XB / 1125 (Sportster-based)20W-50 (MCV)5,000 mi engineAir- and oil-cooled XB twins.

    Engine vs. Transmission vs. Primary — Which Fluid Goes Where

    Modern Harleys use three separate sumps. Here's the AMSOIL-recommended fluid for each, plus the shortcut for riders who want to run a single product across all three.

    FeatureEngineTransmissionPrimary
    SumpEngine crankcaseTransmission gearboxPrimary chaincase
    AMSOIL product20W-50 MCV (or 15W-60 MSV / 20W-40 MVI / SAE 60 MCS)V-Twin Transmission Fluid (MVT)V-Twin Primary Fluid (MVP)
    Primary benefitWear protection, heat resistance, extended drainsQuieter gears, smoother shiftsConsistent clutch engagement, easier shift to neutral
    Drain interval5,000–7,500 mi or annuallyUp to 15,000 mi or per OEMUp to 15,000 mi or per OEM
    Wet-clutch safeYes (JASO MA2)YesYes — engineered for wet clutch
    Three-hole shortcutMCV 20W-50 approved for all three sumpsMCV 20W-50 acceptable in transMCV 20W-50 acceptable in primary — but MVP shifts smoother

    Best Synthetic Oil for Harley-Davidson, Indian & Victory V-Twins

    Air-cooled American V-Twins run hotter, vibrate harder, and share oil with a wet clutch — conditions that destroy generic car oil. AMSOIL Synthetic V-Twin Motorcycle Oil is purpose-built for these engines. Every formula meets JASO MA2 for wet-clutch compatibility and the Harley-Davidson HD 360 specification for use in the engine, transmission, and primary chaincase of three-hole Big Twins and Sportsters.

    Four Engine Oil Viscosities — Pick the One Built for Your Bike

    • 20W-50 (MCV) — flagship grade for modern Harley-Davidson Big Twins and Sportsters. Approved for engine, transmission, and primary use in three-hole bikes.
    • 15W-60 (MSV) — heavier film strength for Florida heat, big-bore kits, high-compression builds, and aggressive touring.
    • 20W-40 (MVI) — engineered for Indian Thunderstroke, Indian PowerPlus, and Victory engines that specify a 20W-40 grade.
    • SAE 60 (MCS) — straight 60-weight synthetic for vintage Shovelhead, Panhead, Knucklehead, and Ironhead Sportster engines.

    Dedicated Transmission Fluid & Primary Fluid

    For the smoothest shifting and longest clutch life, run AMSOIL Synthetic V-Twin Transmission Fluid (MVT) in the gearbox and AMSOIL V-Twin Primary Fluid (MVP) in the chaincase. Each is purpose-built — no compromise. Owners regularly report quieter gears, smoother shifts, and reduced clutch slip after switching from petroleum or generic motorcycle oil.

    Shock Therapy® Suspension Fluid

    Forks and shocks deserve the same engineered fluid as the engine. AMSOIL Shock Therapy is a 100% synthetic suspension fluid that resists foaming and shear breakdown for repeatable damping ride after ride. Choose #5 Light (STL) for plush feel and #10 Medium (STM) for firmer damping or warmer climates.

    Complete Oil Change Kits — One Box, One Service

    AMSOIL V-Twin Oil Change Kits combine four or five quarts of 20W-50 with a black or chrome AMSOIL premium oil filter — everything you need to service your Harley in one box, shipped to your door. Pick HDBK-EA / HDCK-EA for 4-quart Twin Cam and Sportster engines, or HDMB-EA / HDMC-EA for 5-quart Milwaukee-Eight and big-bore touring engines.

    AMSOIL V-Twin vs. Harley SYN3, Mobil 1 V-Twin & Spectro Golden 4

    AMSOIL V-Twin synthetic oils are independently tested against Harley-Davidson Genuine SYN3, Mobil 1 V-Twin 20W-50, Royal Purple Max-Cycle, and Spectro Golden 4 — and consistently demonstrate better wear protection, higher film strength at elevated oil temperatures, and lower volatility. Backed by the AMSOIL Limited Warranty and Magnuson-Moss federal warranty protection for your Harley factory warranty.

    V-Twin Oil for Florida, Tampa Bay & the United States

    1stSynthetic.com is your independent AMSOIL Dealer based in Dade City, Florida, serving Harley, Indian, and Victory riders across Tampa, Lakeland, Wesley Chapel, Zephyrhills, Brooksville, Brandon, Sarasota, Orlando, and the entire United States. Order online and ship direct from the AMSOIL distribution center, or join the Preferred Customer program to save 25% on every V-Twin order, every time.

    V-Twin Motorcycle Oil FAQ

    What is the best synthetic oil for a Harley-Davidson?▾
    AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil (product code MCVQT-EA) is the most widely recommended synthetic for Harley-Davidson engines. It meets JASO MA2 and Harley-Davidson HD 360 requirements, runs cooler than petroleum oils, and is approved for use in the engine, transmission, and primary chaincase of three-hole Harleys.
    What oil should I use in my Indian or Victory motorcycle?▾
    Indian and Victory motorcycles require a 20W-40 motorcycle oil. AMSOIL 20W-40 Synthetic V-Twin Motorcycle Oil (MVIQT-EA) is engineered specifically for Indian Thunderstroke, PowerPlus, and Victory engines and meets the factory viscosity recommendation.
    Do I need separate oils for my Harley engine, transmission, and primary?▾
    Most modern Harley-Davidson motorcycles have three separate sumps. AMSOIL recommends V-Twin 20W-50 (MCV) for the engine, V-Twin Transmission Fluid (MVT) for the transmission, and V-Twin Primary Fluid (MVP) for the primary chaincase — each formulated for its specific job. MCV 20W-50 is also approved for all three sumps if you prefer a single-bottle service.
    When should I use AMSOIL 15W-60 V-Twin instead of 20W-50?▾
    Choose 15W-60 (MSVQT-EA) if you ride in extreme heat, run a big-bore or high-compression engine, tow a trailer, or routinely operate at high RPM for long distances. The heavier viscosity maintains film strength when oil temperatures climb past 250 °F.
    What is AMSOIL SAE 60 V-Twin oil for?▾
    AMSOIL SAE 60 Synthetic V-Twin Oil (MCSQT-EA) is a straight 60-weight oil for vintage Harley-Davidson engines that originally specified single-grade oil — Shovelhead, Panhead, Knucklehead, and Ironhead Sportster. It delivers modern synthetic protection in the viscosity those engines were designed around.
    Which Shock Therapy suspension fluid should I run?▾
    Use Shock Therapy #5 Light (STLQT-EA) for plusher front fork action, lighter rider weights, or cooler riding conditions. Use Shock Therapy #10 Medium (STMQT-EA) for heavier riders, aggressive street riding, or warmer climates where higher damping resistance is preferred. Always follow your shock or fork manufacturer's spec.
    How often should I change the oil in my V-Twin?▾
    AMSOIL synthetic V-Twin oils are formulated for extended service. Most riders change engine oil every 5,000 to 7,500 miles, and primary and transmission fluid every 10,000 to 15,000 miles. Always follow your owner's manual for warranty compliance.
    Is AMSOIL V-Twin oil approved for my Harley warranty?▾
    Yes. AMSOIL synthetic V-Twin oils meet or exceed Harley-Davidson HD 360 specifications. Federal Magnuson-Moss law protects you — using a qualifying aftermarket oil cannot void your factory warranty.
    Do AMSOIL V-Twin oil change kits include the filter?▾
    Yes. The HDBK-EA and HDMB-EA kits include an AMSOIL EaOM black premium oil filter; the HDCK-EA and HDMC-EA kits include a polished chrome filter. All kits include a drain-plug O-ring and four (HDBK / HDCK) or five (HDMB / HDMC) quarts of MCV 20W-50.
    Where can I buy AMSOIL V-Twin oil in Florida?▾
    1stSynthetic.com is your independent AMSOIL Dealer based in Dade City, Florida — serving Tampa, Lakeland, Wesley Chapel, Zephyrhills, Brooksville, and customers throughout the United States. Order online, ship direct from the AMSOIL distribution center, or join the Preferred Customer program to save 25% on every V-Twin order.

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