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5 Best Car Engine Oils of 2026

Last Updated - 26/05/2026

1
Best Choice
25% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Castrol
25% Off

Castrol MAGNATEC 5W-30 P Engine Oil, 5 Litre

Castrol

£37.35

£49.95
(25% Off)

More Details
Main highlights
- 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.
- Performance PSA Approval B71 2290 PSA Approval B71 2297 STELLANTIS FPW9.55535/03
- Description Castrol MAGNATEC has been developed to meet the unique demands of modern driving. 75% of engine wear can happen when we start the ignition. And acceleration, slowing down, and idling journeys in city driving only increase this strain. That means every congested commute, weekend getaway, and shopping trip may increase engine wear.
- Advantages Castrol MAGNATEC clings, locks, and protects to deliver 50% better engine wear protection*. Helping to safeguard your engine’s vital components by: Forming a resistive barrier between metal contact points in the valvetrain Managing abrasive piston deposits, guarding against cylinder liner wear Maintaining timing chain tension and engine synchronicity by minimising chain damage and elongation
£37.35
£49.95 (25% Off)
2
42% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Castrol
42% Off

Castrol EDGE 5W-30 LL Engine Oil 5L

Castrol

£35.78

£61.43
(42% Off)

More Details
Main highlights
- Suitable for ACEA/VW/BMW/Porsche/Mercedes
- Specifications: ACEA C3 - BMW - Longlife-04 - MB-Approval 229.31/ 229.51 - Porsche C30 - VW 504 00/ 507 00
- Recommended by world-leading car manufacturers
- Protects the engine for the entire drain interval even under extreme pressure
- Castrol EDGE lowers friction and maximises engine performance
£35.78
£61.43 (42% Off)
3
43% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Castrol
43% Off

Castrol EDGE 5W-30 LL Engine Oil 4L

Castrol

£27.99

£49.15
(43% Off)

More Details
Main highlights
- Suitable for ACEA/VW/BMW/Porsche/Mercedes
- Specifications: ACEA C3 - BMW - Longlife-04 - MB-Approval 229.31/ 229.51 - Porsche C30 - VW 504 00/ 507 00
- Independently proven to improve engine efficiency
- Castrol EDGE lowers friction and maximises engine performance
- Castrol EDGE boosted with Titanium FST sustains maximum performance even when under pressure
£27.99
£49.15 (43% Off)
4
Best Value
49% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Castrol
49% Off

Castrol EDGE 5W-30 LL Engine Oil 4L

Castrol

£25.19

£49.15
(49% Off)

More Details
Main highlights
- Suitable for ACEA/VW/BMW/Porsche/Mercedes
- Specifications: ACEA C3 - BMW - Longlife-04 - MB-Approval 229.31/ 229.51 - Porsche C30 - VW 504 00/ 507 00
- Independently proven to improve engine efficiency
- Castrol EDGE lowers friction and maximises engine performance
- Castrol EDGE boosted with Titanium FST sustains maximum performance even when under pressure
£25.19
£49.15 (49% Off)
5
48% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Castrol
48% Off

Castrol MAGNATEC 5W-30 A5 Engine Oil 5L

Castrol

£28.42

£54.88
(48% Off)

More Details
Main highlights
- combining patented DUALOCK molecule technology with Castrol’s most efficient full synthetic base oils. Forms a powerful force-field of wear protection
- Suitable for use in automotive gasoline and diesel engines where the manufacturer recommends an ACEA A1/B1, A5/B5, API SN, ILSAC GF-5 or earlier specification 5W-30 lubricant
- Specifications: ACEA A1/B1, A5/B5 - API SN - ILSAC GF-5 - Meets - Ford WSS-M2C913-C/ WSS-M2C913-D
- Provides superior performance under extreme cold start up conditions
- Proven to reduce wear in stop-start situations- remove this statement
£28.42
£54.88 (48% Off)

5 Best Car Engine Oils of 2026

Castrol MAGNATEC 5W-30 P Engine Oil, 5 Litre

Castrol EDGE 5W-30 LL Engine Oil 5L

Castrol EDGE 5W-30 LL Engine Oil 4L

Castrol EDGE 5W-30 LL Engine Oil 4L

Castrol MAGNATEC 5W-30 A5 Engine Oil 5L

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