10 Best 10w40 Motorcycle Oil Fully Synthetic in The UK

Last updated on 04/07/2025
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Best Choice
1
9.8
Exceptional
Motul Oil & Lubricant 7100 10w40 4T 100% Synthetic (4L+1L Free)
Motul
Motul Oil & Lubricant 7100 10w40 4T 100% Synthetic (4L+1L Free)
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Main Highlights
  • Motul Oil & Lubricant 7100 10w40 4T 100% Synthetic (4L+1L Free)
9.8
Exceptional
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Best Value
2
9.7
Exceptional
Castrol POWER1 ULTIMATE 4T 10W-40 Motorcycle Oil 4L, Gold
Castrol
Castrol POWER1 ULTIMATE 4T 10W-40 Motorcycle Oil 4L, Gold
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Why We Love It
  • Engineered for outstanding performance.
  • 5-in-1 formula for maximum efficiency.
  • Excellent protection and smooth riding.
Main Highlights
  • Performance API SN JASO MA2
  • Description With so many engine oils available in the market, don’t you want to know which one offers uncompromising performance? Castrol POWER1 ULTIMATE is engineered for outstanding performance across 5 critical areas. Castrol POWER1 ULTIMATE’s 5-in-1 formula delivers outstanding performance and protection.
  • Application Castrol POWER1 ULTIMATE is suitable for all makes of 4-stroke bikes, both carburetor or fuel injected where JASO MA or MA2 are recommended.
  • Advantages Castrol POWER1 ULTIMATE’s 5-in-1 formula delivers: 1. Excellent acceleration* 2. Excellent protection 3. Smooth riding 4. Keeps the engine cool on long rides 5. Enduring performance Complies with requirements of catalyst equipped engines *Acceleration benefits will be subject to riding style and oil viscosity grade
  • Storage All packages should be stored under cover. Where outside storage is unavoidable drums should be laid horizontally to avoid the possible ingress of water and damage to drum markings. Products should not be stored above 60°C, exposed to hot sun or freezing conditions.
9.7
Exceptional
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3
9.5
Superb
Motul 10W-40 4L 300V 4T Factory Line Ester Core Motorcycle Oil
Motul
Motul 10W-40 4L 300V 4T Factory Line Ester Core Motorcycle Oil
Why We Love It
  • Fully synthetic for racing.
  • Optimal adhesion and stability.
  • Superior high-temperature resistance.
Main Highlights
  • Fully synthetic 4-stroke motorcycle engine oil.
  • Designed for the racing use of the factory teams.
  • Maximum oil film stability.
  • Optimal adhesion.
  • High temperature resistance for optimal wear protection.
9.5
Superb
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4
9.4
Superb
Castrol POWER1 4T 10W-40 Motorcycle Oil 4L, White
Castrol
Castrol POWER1 4T 10W-40 Motorcycle Oil 4L, White
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Why We Love It
  • Optimized for latest motorcycle engines.
  • Features Power Release Technology.
  • Premium part-synthetic formulation.
Main Highlights
  • Suitable for API/JASO
  • Specifications: API SN, JASO MA2
  • Castrol POWER1 4T 10W-40 (Formerly Castrol POWER1 GPS 4T 10W-30) is an advanced, premium quality engine oil developed for the latest generation 4 stroke motorcycle engines.
  • Type: Part Synthetic
  • Power Release Technology reduces loss of friction and optimises motorcycle performance and acceleration
9.4
Superb
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5
9.3
Superb
Motul 107693 3000 4T 10W-40 4L
Motul
Motul 107693 3000 4T 10W-40 4L
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Why We Love It
  • Premium quality you can trust.
  • Meets demanding industry standards.
  • Experience from over 150 years.
Main Highlights
  • - Motul stands for premium quality lubricants
  • - Meets the most demanding requirements on the market
  • - Products with international approvals and certifications
  • - Specialist in lubricants for over 150 years
9.3
Superb
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6
9.1
Superb
10w40 Motorcycle Oil Fully Synthetic API: SN 5L 5 Litres
Westway Lubricants
10w40 Motorcycle Oil Fully Synthetic API: SN 5L 5 Litres
Why We Love It
  • Superior quality ensures excellent performance.
  • Versatile with wide motorcycle compatibility.
  • Maintains wet clutch compatibility.
Main Highlights
  • High Quality Fully Synthetic 10w40 Motorcyle Oil
  • Suitable for use in a wide range of Motorcycles
  • Fully Compatible with Wet / Oil Immersed Clutches
  • Meets JASO MA2 Specifications
  • Made in the UK API: SN, SM, SL, SJ
9.1
Superb
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7
9.0
Superb
Elf Moto 4T Road 10W40 Motorcycle Oil 4 Stroke Engine Oil 4L
ELF
Elf Moto 4T Road 10W40 Motorcycle Oil 4 Stroke Engine Oil 4L
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Why We Love It
  • Ensures easy cold start-ups.
  • Prevents clutch slippage.
  • Reduces piston ring fouling.
Main Highlights
  • Specifications: API SN, JASO MA2
  • ELF MOTO 4 ROAD 10W-40 is synthetic based 4-stroke motorcycle engine oil for modern high-performance sports bikes
  • Elf Motorcycle engine oil ensures easy cold start-ups, fast oil pressure rises and low friction between moving engine components
  • Reduces piston ring groove fouling for optimum sealing during combustion
  • Preventing clutch slippage and premature disk wear
9.0
Superb
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8
8.8
Excellent
Shell Advance 4T Ultra 10W-40, 4 Litre
Shell
Shell Advance 4T Ultra 10W-40, 4 Litre
Why We Love It
  • PurePlus technology ensures top-tier performance.
  • Active cleansing prolongs engine life.
  • Endorsed by leading motorcycle manufacturers.
Main Highlights
  • Shell Advance 4T ultra with PurePlus technology, is a top-tier 4 stroke motorcycle engine oil
  • The 100 Percent synthetic Shell Advance 4T Ultra is made from this pure and clear base oil, combined with a motorcycle-specific additive pack with unique active cleansing technology
  • Specifications, Approvals and Recommendations: API SN, JASO MA2
  • Protects and prolongs engine life / Keeps engine cleaner / Reduces engine noise and vibration
  • Shell Advance 4T Ultra has been race proven and endorsed by leading motorcycle manufacturers
8.8
Excellent
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9
8.7
Excellent
Save 11%
OIL CASTROL MAGNA A3/B4 10W40
Castrol
OIL CASTROL MAGNA A3/B4 10W40
11% Off
8.7
Excellent
Save 11%
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10
8.7
Excellent
Castrol MAGNATEC 10W-40 A/B Engine Oil 5L
Castrol
Castrol MAGNATEC 10W-40 A/B Engine Oil 5L
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Why We Love It
  • Recommended for various engines.
  • Dramatically reduces wear severity.
  • Offers patented unique protection.
Main Highlights
  • Suitable for use in automotive gasoline and diesel engines where the manufacturer recommends an ACEA A3/B4, API SP 10W-40 lubricant
  • Specifications: ACEA A3/B4 API SP Meets - Fiat 9.55535-D2 MB-Approval 229.3 VW 501 01/ 505 00
  • Castrol MAGNATEC 10W-40 A/B is suitable for use in automotive gasoline and diesel engines where the manufacturer recommends an ACEA A3/B4, API SP 10W-40 lubricant.
  • Dramatically reduce both warm-up2 and stop-start3 wear by 50%
  • Deliver unique patented protection designed specifically for modern driving
8.7
Excellent
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