AMSOIL 10W-30 100% Synthetic Metric Motorcycle Oil

Precision-Engineered for Four-Stroke Metric Bikes

AMSOIL 10W-30 Synthetic Metric Motorcycle Oil delivers superior performance for sport bikes, cruisers, touring, and adventure motorcycles.
It’s formulated to protect both engines and transmissions under demanding conditions.
Fully compatible with wet-clutch systems for smooth, reliable gear engagement.

Excellent Heat and Wear Protection

Outstanding High-Temperature Film Strength

This oil outperforms standard benchmarks for heat-resistant film strength, ensuring durable engine protection.

Heavy-Duty Anti-Wear Chemistry

Contains potent anti-wear additives to minimize engine wear across all riding styles.
Designed to resist volatility and prevent sludge and carbon buildup for cleaner engine internals.

Smooth Shifting and Clutch Reliability

Free from Friction Modifiers

Formulated without friction modifiers to promote smooth clutch engagement and gear shifts.
Controls clutch heat and prevents slippage and glazing for longer clutch life.

Enhanced Clutch Longevity

Supports consistent clutch performance, even in high-stress riding conditions.

Superior Foam Control

Advanced anti-foam agents prevent oil foaming at high engine speeds.
Ensures steady lubrication and reliable wear protection, allowing riders to push their bikes hard.

Additional Details

Refer to the product data sheet for complete technical specifications and usage recommendations.

AMSOIL 10W-30 100% Synthetic Metric Motorcycle Oil – Deep Dive For Modern Metric Riders

AMSOIL 10W-30 100% Synthetic Metric Motorcycle Oil is precision-engineered for four-stroke metric motorcycles that see real-world riding: commuting, touring, aggressive canyon runs, and weekend adventures.

It’s built for bikes where the engine, transmission, and wet clutch all share the same oil, and it’s designed to keep all three happy under heat, load, and high RPM.

This 10W-30 formula:

• Protects engines and transmissions under demanding conditions
• Delivers smooth, reliable wet-clutch operation
• Controls heat, wear, deposits, and foam so you can ride with confidence

Below is a deeper dive you can drop right onto your Metric Motorcycle Oil page.

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What 10W-30 Really Does For Your Metric Motorcycle

Balanced Viscosity For Real Riding

10W-30 might look “light” compared to 15W-50, but on modern metric bikes it’s often exactly what the engineers wanted.

• “10W” = Flows quickly during cold starts, reducing wear when you first hit the starter.
• “30” = Provides the correct thickness at operating temperature for tight, high-revving engines.

For many sport bikes, naked bikes, and lighter touring machines, 10W-30 offers:

• Faster oil flow at startup
• Less drag and slightly better fuel efficiency
• Enough film strength for spirited riding when fully hot

Always check the owner’s manual, but if your bike calls for 10W-30 or lists it as a primary recommendation, this oil is tuned to be an ideal match.

Made For Shared-Sump Engine + Gearbox + Clutch

Most metric motorcycles use a shared sump, meaning one oil must:

• Lubricate the crank, pistons, cams, and bearings
• Cushion and protect transmission gears
• Deliver the right friction behavior for a wet clutch

That is a tougher job than most automotive oils ever see. AMSOIL 10W-30 Metric Motorcycle Oil is built specifically for this environment, with:

• Shear-stable synthetic base oils
• Motorcycle-specific additive chemistry
• Carefully tuned clutch friction characteristics

You’re not putting a car oil into a bike and “hoping for the best” — this is bike-first engineering.

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Heat And Wear Protection You Can Trust

High-Temperature Film Strength

Sport and metric motorcycles run hot:

• Compact, high-revving engines
• Fairings and bodywork that trap heat
• Traffic, slow urban riding, and long summer rides

AMSOIL 10W-30 is formulated for outstanding high-temperature film strength. In plain language:

• The oil stays thick enough to keep metal surfaces separated
• It doesn’t thin out excessively when fully hot
• Bearings, cams, rings, and gears stay protected even when you ride aggressively

This is especially important if you spend a lot of time:

• Above mid-range RPM
• In hot weather
• With a passenger or luggage on board

Heavy-Duty Anti-Wear Chemistry

The oil also carries a heavy-duty anti-wear additive package designed to:

• Protect cam lobes and followers
• Guard piston rings and cylinder walls
• Reduce scuffing on transmission gear teeth

Those additives form a protective, sacrificial layer under high pressure. When loads spike, the additive “takes the hit” instead of the metal surfaces. The result is less long-term wear across a wide range of riding styles, from gentle commuting to spirited weekend rides.

Controls Sludge, Varnish, And Carbon

Heat plus cheap oil usually equals sludge. AMSOIL 10W-30 is designed to:

• Resist oxidation
• Fight thickening
• Limit varnish and carbon deposits in hot areas of the engine

This helps:

• Keep ring grooves cleaner for better sealing
• Reduce sticky deposits on pistons and valves
• Maintain free-flowing oil passages over time

Cleaner internals translate into more consistent performance, easier starting, and better long-term reliability.

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Wet-Clutch Behavior And Shift Quality

No Friction Modifiers – On Purpose

Automotive “energy-saving” oils often use friction modifiers that are great for fuel economy but terrible for wet clutches. They can cause:

• Clutch slip
• Glazing on clutch plates
• Inconsistent engagement when hot

AMSOIL 10W-30 Metric Motorcycle Oil is formulated without friction modifiers, specifically to keep your clutch working the way the factory intended.

You get:

• Strong, predictable engagement
• Less risk of slip under heavy throttle
• Better feel when easing the bike off the line or feathering the clutch in tight turns

Smooth, Reliable Shifting

Because the engine and transmission share the same oil, transmission feel is directly affected by oil quality. With this 10W-30:

• Gears see a stable, shear-resistant film
• You get smooth engagement of dogs and shift forks
• Shift quality remains more consistent across the oil change interval

If you’ve ever felt a gearbox get “notchy” or vague as oil ages, a dedicated motorcycle synthetic like this can make a noticeable difference.

Extended Clutch Life Under Stress

By controlling heat and maintaining the right friction characteristics, this oil helps:

• Reduce clutch glazing
• Limit hot-spotting on plates
• Support long-term clutch durability

This is especially important for:

• Stop-and-go city riders
• Learners who slip the clutch more
• Adventure riders who pick through rough, technical terrain at low speed

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Foam Control At High RPM

Why Foam Matters

Inside a motorcycle engine, gears and moving parts can whip oil into foam. Foam is basically air trapped in oil, and air:

• Does not carry heat well
• Does not lubricate well
• Can cause fluctuations in oil pressure

That’s the last thing you want at 9,000+ RPM.

Advanced Anti-Foam Additives

AMSOIL 10W-30 uses advanced anti-foam agents to keep bubbles under control at high engine speeds. That means:

• More stable oil pressure
• Consistent lubrication of bearings and cam journals
• Better protection during long, high-RPM highway runs or spirited rides

You can ride your bike hard knowing the oil isn’t turning into a frothy mess inside the engine.

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Engine Cleanliness, Corrosion Protection And Storage

Keeping Internals Clean Over Time

Strong detergents and dispersants in this 10W-30 help:

• Keep soot, combustion by-products, and fine metal particles suspended
• Reduce the formation of deposits on hot parts
• Minimize sludge buildup in low-flow zones

Clean engines:

• Maintain compression longer
• Run smoother
• Are easier to tune and keep in spec

Protection When The Bike Sits

Many riders park their bikes for weeks, or even the whole winter. During downtime, moisture and acids can attack internal engine parts.

This oil includes additives to:

• Resist rust and surface corrosion
• Neutralize acids formed from combustion by-products
• Protect steel and iron components while the bike is stored

If you change to fresh oil before storage, you’re giving your engine the best shot at a trouble-free spring startup.

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Where AMSOIL 10W-30 Metric Motorcycle Oil Really Shines

Modern Sport And Street Bikes

This viscosity is a natural fit for many:

• 600–1000 cc sport bikes that specify 10W-30
• Naked and standard bikes used for commuting and weekend rides
• Smaller and mid-sized metric bikes designed for efficiency and high RPM

These engines often use tighter clearances and run at higher revs than big-twin cruisers. 10W-30 supports:

• Fast oil flow on cold starts
• Low drag at speed
• Adequate film strength at full operating temperature

Daily Commuters And City Riders

If you ride every day:

• Stop-and-go traffic
• Short hops to work
• Frequent heat cycles

…you need oil that can handle constant idling and repeated warm-up/cool-down cycles. AMSOIL 10W-30:

• Gets to critical parts quickly on every start
• Resists fuel dilution and oxidation from repeated short trips
• Keeps engine internals cleaner despite lots of low-speed operation

Light Touring And Adventure Use

For riders who tour or do light adventure riding on bikes that spec 10W-30:

• High-temperature stability protects during long highway days
• Foam control and shear stability support steady high-speed cruising
• Cleanliness additives help in dusty, variable conditions

If you pack luggage, see changing weather, and put a lot of miles on in a season, having a stable, high-quality synthetic in the sump makes a big difference.

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How 10W-30 Fits Into The Metric Motorcycle Lineup

Choosing Between 10W-30, 10W-40, 5W-40, and 15W-50

Within the AMSOIL Metric Motorcycle family, each grade has a natural home:

• 10W-30 – Great for many modern metric bikes where the OEM recommends this grade for efficiency and high-revving performance.
• 10W-40 / 5W-40 – A slightly heavier hot viscosity for bikes that see more heat, load, or mixed riding.
• 15W-50 – For hot climates, big loads, track use, or bikes where the manual allows a heavier grade for severe conditions.

All use the same core ideas:

• Robust synthetic base oils
• Strong anti-wear chemistry
• Wet-clutch-friendly friction behavior
• Foam, deposit and oxidation control

10W-30 is the lighter-viscosity, high-response option tailored to bikes designed with that grade in mind.

One Oil For Engine, Gearbox And Clutch

Like the other Metric Motorcycle oils, 10W-30 replaces:

• Engine oil
• Separate gearbox oil (in integrated designs)

It is designed as a one-fluid solution for machines with a common sump. That simplifies maintenance and ensures consistent behavior across the whole powertrain.

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Practical Maintenance Tips With 10W-30 Metric Oil

Confirm OEM Specs First

Before choosing 10W-30:

• Check the viscosity chart in your owner’s manual
• Confirm the required JASO (usually MA or MA2) rating
• Make sure 10W-30 is allowed for your climate and riding style

If your book lists 10W-30 as recommended for your temperature range, this oil is designed to fit right in.

Service Interval Strategy

A solid approach for most riders:

• Follow the manufacturer’s recommended change interval for normal use
• Shorten the interval for:
  • Track days
  • Very dusty or dirty environments
  • Lots of short trips and idling
• Always change the filter with the oil

Because AMSOIL 10W-30 is a robust synthetic, it handles demanding conditions well, but good habits still matter.

Pre-Season And End-Of-Season Oil Changes

Many riders like to:

• Start the main riding season with fresh oil and a new filter
• Change again before winter storage if the oil has many miles

This ensures:

• You ride most of the season on clean oil
• The engine sits over winter with fresh, protective fluid

That simple routine pays off in easier spring starts and better long-term reliability.

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Is AMSOIL 10W-30 100% Synthetic Metric Motorcycle Oil Right For You?

You’re an ideal match for this oil if:

• You ride a four-stroke metric motorcycle that specifies 10W-30
• Your bike has an integrated engine/transmission/wet-clutch system
• You want strong protection without the drag of thicker grades
• You ride a mix of city, highway, and weekend fun
• You value smooth shifting, clean internals, and steady clutch behavior

In short, AMSOIL 10W-30 100% Synthetic Metric Motorcycle Oil is built for riders who want a modern, efficient viscosity that still delivers serious protection, clutch confidence, and long-term reliability in today’s high-revving metric motorcycles.