Best Oil For Ninja 400: Compare 10W-40 Motorcycle Oils

#1 · Best Overall

1. Motul 7100 4T

• Compatible with Vehicle Type: all-terrain-vehicles;utility-vehicles;street-s…
• Size: 4L
• Container Type: Bottle
• Weight: 3.6 kg

Best for: Bulk ester-synthetic buyer.

Why it ranks #1: The 10W-40 listing explicitly specifies API SP, JASO MA2, wet-clutch safety, and engine and gearbox protection; its 4L bottle suits planned servicing.

Motul 7100 pairs 100% synthetic ester technology with a 4-liter bottle, giving riders a larger supply of motorcycle oil in one container. Its listing identifies 10W-40 and JASO MA2 wet-clutch suitability, while the product description focuses protection on both the engine and transmission.

The ester-based synthetic formulation is described as protecting modern four-stroke engines and the transmission, so the product addresses two major systems in one oil. Motul also specifies smooth clutch engagement for motorcycles with wet clutches, a useful fit consideration for a motorcycle application. The 4-liter bottle provides a larger quantity than a one-quart container, which can suit planned maintenance when the required oil specification and service amount match. Its compatibility list includes street-sport motorcycles, but does not name the Ninja 400.

Skip it if you only need a small top-up or want a one-quart bottle; Lucas Oil 10767 comes in a one-quart container.

Motul 7100 suits a rider seeking a larger supply of ester-based 10W-40 with stated engine, transmission, and wet-clutch benefits. Its 4-liter size may be more than needed, so match quantity and specifications to the Ninja 400 service.

Listed on Amazon as: Motul 7100 4T 10W-40 Full Synthetic Motorcycle Oil – Ester Technology – API SP JASO MA2 Wet Clutch Safe – Engine and Gearbox Protection for Street Sport Adventure 4L

#2 · Best Six-Quart Supply

2. Castrol Power1 4T

• Compatible with Vehicle Type: Motorcycle
• Size: 1 Quart
• Container Type: Bottle
• Weight: 1 kg

Best for: Multi-bottle service planner.

Why it ranks #2: This 10W-40 motorcycle oil lists JASO MA-2 and protection for engine, clutch, and gearbox; the pack contains six one-quart bottles.

Castrol Power1’s Trizone technology targets the engine, clutch, and gearbox together, giving this full-synthetic 10W-40 a clearly defined three-zone protection focus. The listing also cites excellent shear stability and API SL and JASO MA-2 performance, while the six-quart pack is suited to buyers planning for multiple bottles.

Trizone technology is described as protecting the engine, clutch, and gearbox, connecting the oil to several critical motorcycle systems rather than the engine alone. Castrol also cites shear stability to help prevent viscosity breakdown, a distinct benefit alongside its stated high-temperature performance for air-cooled and water-cooled engines. The pack contains six one-quart bottles, which can simplify stocking multiple quarts but is a substantial quantity for a single service. Check the Ninja 400’s requirements and how much oil you need.

Skip it if you need just one quart rather than a six-bottle pack; Castrol Power 1 Racing 4T is listed as a single quart.

This Castrol pack fits riders who want stated engine, clutch, and gearbox protection and expect to use multiple quarts over time. The six-bottle quantity is less suitable for a one-off service; verify the Ninja 400’s oil requirements.

Listed on Amazon as: Castrol Power1 4T 10W-40 Full Synthetic Motorcycle Oil, 1 Quart, Pack of 6

#3 · Best Ester Formula

3. TRIAX XTerra 4T

• Compatible with Vehicle Type: 4 Cycle Gasoline Engine, Motorcycle, ATV…
• Size: 1 Quart
• Container Type: Bottle
• Weight: 2 lb

Best for: Multi-vehicle synthetic user.

Why it ranks #3: The 10W-40 full-synthetic ester formula is stated to exceed JASO MA-2 and targets wet-clutch engagement, making it a specification-rich option.

TRIAX XTerra names Kawasaki among its compatible makes, giving Ninja 400 shoppers a brand-specific compatibility signal alongside its 10W-40 grade. Its 100% synthetic ester formulation and stated JASO MA2 and API performance claims make this one-quart oil a focused option for motorcycle use.

The listing names Kawasaki among a broad set of compatible makes, which gives buyers a relevant brand-level signal, though it does not identify the Ninja 400 specifically. TRIAX says its synthetic ester formulation supports clutch engagement, stable viscosity, and performance under high thermal stress and high RPMs, linking the formulation to demanding operation. Its stated JASO MA-2 performance claim is relevant to wet-clutch motorcycle use. A one-quart bottle is convenient for a smaller quantity, but may not cover a larger service requirement.

Skip it if you want a larger single container for planned maintenance; Motul 7100 4T is listed in a 4-liter bottle.

TRIAX XTerra suits riders wanting a one-quart synthetic 10W-40 with Kawasaki named in its compatibility list and stated wet-clutch claims. That listing does not name the Ninja 400, so check its exact oil requirements.

Listed on Amazon as: TRIAX XTerra 4T 10W-40 Full Synthetic 4 Stroke Engine Oil | For Motorcycles, ATVs, Quads & Snowmobiles | Exceeds JASO MA2 & API SL/SM/SN | True All Season | Race Ready (1 Quart)

#4 · Best Four-Liter Alternative

4. Liqui Moly 4T Street

• Compatible with Vehicle Type: Car
• Size: 4 liters
• Container Type: Jug
• Weight: 8 lb

Best for: Broad-condition street rider.

Why it ranks #4: This 4-liter 10W-40 oil is designed for four-stroke engines and is listed as suitable for engines with or without a wet clutch.

Liqui Moly lists suitability for air- and water-cooled four-stroke engines under normal to extreme operating conditions, making operating range its clearest differentiator. This synthetic-technology 10W-40 also supports use with or without a wet clutch, which gives buyers flexibility across the engine types named in its description.

The stated compatibility with air- and water-cooled four-stroke engines connects the oil to a broad range of operating setups, including the cooling types specified in the listing. Suitability for engines with or without a wet clutch adds another practical compatibility point. Liqui Moly also cites optimum lubrication, engine cleanliness, friction behavior, and minimal wear, while its description mentions smooth gear shifting. The 4-liter jug provides a substantial quantity, so check the Ninja 400’s required grade and service amount.

Skip it if you need only a small amount for topping up; Valvoline 4-Stroke Full Synthetic 10W-40 is listed in a one-quart bottle.

This Liqui Moly option fits riders looking for 10W-40 with stated air- and water-cooled four-stroke and wet-clutch flexibility. The 4-liter jug suits buyers needing more oil, but verify the Ninja 400’s specification and service quantity.

Listed on Amazon as: Liqui Moly 4T 10w-40 Street 4-Liter

#5 · Best Wet-Clutch Claim

5. Valvoline 4-Stroke Full Synthetic

• Compatible with Vehicle Type: Scooter
• Size: 1 QT
• Container Type: Bottle
• Weight: 1.8 lb

Best for: Wet-clutch protection seeker.

Why it ranks #5: The 10W-40 full-synthetic motorcycle oil specifically claims wet-clutch protection and smooth shifting, though its vehicle-type field says scooter.

Up to 10X better friction protection versus the cited JASO T903:2016 friction standard gives Valvoline’s full-synthetic 10W-40 a specific wet-clutch focus. Its listed clutch protection helps address slippage while supporting smooth shifting, making this one-quart bottle a candidate for riders prioritizing clutch behavior alongside engine protection.

Valvoline says its advanced additives provide enhanced wet-clutch protection, which helps prevent slippage and supports smooth shifting. The product also claims up to 5X better wear protection versus industry standards in IVA engine tests, offering a concrete engine-protection point alongside its friction claim. Deposit and sludge protection addresses engine cleanliness over use. The one-quart bottle is a manageable quantity for a top-up or smaller oil change, though the supplied details do not specify Ninja 400 fitment.

Skip it if you need a multi-liter container for an oil change; this listing is one quart, unlike Motul 7100 4T’s 4L bottle.

A rider seeking a one-quart full-synthetic 10W-40 with stated wet-clutch and deposit protection may find this a practical option. Check the Ninja 400’s required oil specification and service quantity before choosing it.

Listed on Amazon as: Valvoline 4-Stroke Motorcycle Full Synthetic 10W-40 Motor Oil 1 Quart

#6

6. Lucas Oil High Performance

• Compatible with Vehicle Type: Motorcycle
• Size: 1 Quart
• Container Type: Bottle
• Weight: 16 oz

Best for: Conventional-oil preference.

Why it ranks #6: Its title identifies conventional 10W-40 motorcycle oil and the listing says Lucas motorcycle oils meet JASO specifications, but it gives no specific JASO grade.

Lucas Oil’s conventional SAE 10W-40 motorcycle oil emphasizes lower operating temperatures and longer oil life, giving riders a straightforward grade and maintenance-oriented claim in a one-quart bottle. Its listed benefits also include quieter operation and fewer leaks, offering practical priorities beyond the basic viscosity designation.

The product lists lower oil temperatures and longer oil life, claims that may appeal to riders focused on operating conditions and service intervals. Lucas also lists less noise and fewer leaks, making those specific concerns part of its pitch. Its motorcycle-oil description says Lucas motorcycle oils meet JASO specifications, while the title identifies this item as conventional 10W-40. The one-quart bottle suits buying a smaller quantity, but the supplied details do not establish Ninja 400-specific approval.

Skip it if you specifically want full synthetic oil; Valvoline 4-Stroke Full Synthetic 10W-40 offers that formulation in a one-quart bottle.

This is a relevant option for a Ninja 400 owner who prefers conventional 10W-40 and values Lucas’s stated temperature, longevity, noise, and leak benefits. Confirm the motorcycle’s oil requirements before selecting this grade and formulation.

Listed on Amazon as: Lucas Oil 10767 High Performance Conventional SAE 10W-40 Motorcycle Oil – 1 Quart

#7

7. Castrol Power 1 Racing 4T

• Compatible with Vehicle Type: Motorcycle
• Size: 1 qt"
• Container Type: Bottle
• Weight: 0.27 g

Best for: 5W-40 grade shopper.

Why it ranks #7: This is a motorcycle oil with shear-stability and high-temperature claims, but its listed 5W-40 viscosity differs from the 10W-40 choices.

Castrol Power 1 Racing is listed as 5W-40, distinguishing it from the 10W-40 oils elsewhere in this roundup. Its race-derived technology targets acceleration, while the listing also cites high-temperature performance for air- and water-cooled engines and shear stability to help prevent viscosity breakdown.

The race-derived technology is described as supporting maximum engine acceleration, giving the oil a performance-oriented claim rather than only a protection focus. Castrol also lists high-temperature performance for both air-cooled and water-cooled engines, which connects the product to two cooling setups. Its shear-stability claim addresses viscosity breakdown, while the additional description cites high-speed engine protection. The bottle is one quart. Because the grade is 5W-40 rather than 10W-40, compare it with the Ninja 400’s specified grade before choosing it.

Skip it if you specifically need 10W-40; Castrol Power1 4T is listed as 10W-40 and comes in a six-bottle pack.

This Castrol option fits a rider whose motorcycle specification calls for 5W-40 and who values the listed acceleration and high-temperature claims. Its grade differs from the 10W-40 focus here, so check the Ninja 400 requirements first.

Listed on Amazon as: Castrol Power 1 Racing 4T Motorcycle Oil – 5W40-1qt. 06113