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10W-40 Engine Oil

10W-40 Engine Oil

10K Boost: Premium Engine Additives for Power & Longevity

10K Boost offers a high-performance range of engine additives, cleaners, and treatments, including top-rated product like the 10K Boost Mass Air Flow (MAF) Sensor Cleaner. Known for its reliable engine protection, deposit removal, and performance restoration, 10K Boost is trusted by car enthusiasts and mechanics who demand long-term engine health and fuel efficiency. With Granville Oil & Chemicals precision formulation and quality assurance, you’re guaranteed top-tier lubricant additive innovation. Enjoy fast next-day delivery (on qualifying orders) and a satisfaction guarantee that makes 10K Boost both affordable and dependable. Every application delivers smoother running, reduced wear, and consistent power.

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10W-40 engine oil remains one of the most widely used grades on UK roads, particularly for older and higher-mileage vehicles. At FIXRA, we stock 10W-40 oil from Shell, Mobil, Comma, Granville, and Valvoline, as well as Castrol 10W-40 engine oil, covering semi-synthetic and fully synthetic options for cars, vans, light commercials and motorcycles.

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Granville Hypalube Engine Oil 10W-40 5L
Granville
Granville Hypalube Engine Oil 10W-40 5L

Item number: 0123

£23.59
£23.59
£23.59
Silverhook Oil 10W-40 Excel Semi Sm/ch-4 1L
Silverhook
Silverhook Oil 10W-40 Excel Semi Synthetic Engine Oil Sm/ch-4 1L

Item number: SHLK2

£5.49
£5.49
£5.49
Comma PMO Eurolite 10W-40 5L
Comma
Comma PMO Eurolite Semi Synthetic Engine Oil 10W-40 5L

Item number: EUL5L

£32.09
£32.09
£32.09
Comma PMO Eurolite 10W-40 1L
Comma
Comma PMO Eurolite Semi Synthetic Engine Oil 10W-40 1L

Item number: EUL1L

£7.99
£7.99
£7.99
Castrol Power 1 4T Engine Oil 10W-40 1L
Castrol
Castrol Power 1 4T Engine Oil 10W-40 1L

Item number: 15043E

£16.29
£16.29
£16.29
Castrol Power 1 Racing 4T Engine Oil 10W-40 1L
Castrol
Castrol Power 1 Racing 4T Engine Oil 10W-40 1L

Item number: 14E94A

£21.69
£21.69
£21.69
Fuchs Titan Syn Mc 10w-40 5L
Fuchs Titan Syn Mc 10w-40 5L
FUCHS
Fuchs Titan Syn Mc Engine Oil 10w-40 5L

Item number: 602193186

£44.09
£44.09
£44.09
Castrol Magnatec Engine Oil 10W-40 A3/B4 4L
Castrol
Castrol Magnatec Engine Oil 10W-40 A3/B4 4L

Item number: 15F7CE

£54.19
£54.19
£54.19
Castrol Power 1 4T Engine Oil 10W-40 4L
Castrol
Castrol Power 1 4T Engine Oil 10W-40 4L

Item number: 15043F

£60.09
£60.09
£60.09
Castrol MAGNATEC 10W-40 A/B Engine Oil 1L
Castrol
Castrol MAGNATEC 10W-40 A/B Engine Oil 1L

Item number: 15F7CA

£11.09
£11.09
£11.09
Castrol GTX 10W-40 A3/B4 Engine Oil 1L
Castrol
Castrol GTX 10W-40 A3/B4 Engine Oil 1L

Item number: 15F8FE

£8.49
£8.49
£8.49
Castrol Vecton Long Drain 10W-40 E6/E9 Truck Oil 5L
Castrol
Castrol Vecton Long Drain 10W-40 E6/E9 Truck Oil 5L

Item number: 15F3D1

£57.99
£57.99
£57.99
Comma X-Flow Type XS 10W-40 5L
Comma
Comma X-Flow Semi Synthetic Engine Oil Type XS 10W-40 5L

Item number: XFXS5L

£36.49
£36.49
£36.49
Shell Engine Oil 10W-40 Helix HX7 1L
Shell
Shell Engine Oil 10W-40 Helix HX7 1L

Item number: 550053736

£10.39
£10.39
£10.39
Shell Helix Engine Oil HX7 10W-40 5L
Shell
Shell Helix Engine Oil HX7 10W-40 5L

Item number: 550053738

£45.19
£45.19
£45.19
Castrol Engine Oil GTX Ultraclean 10W-40 A3/B4 4L
Castrol
Castrol Engine Oil GTX Ultraclean 10W-40 A3/B4 4L

Item number: 15F8FD

£48.19
£48.19
£48.19
Valvoline Synpower Engine Oil SAE 10W-40 5L
Valvoline
Valvoline Synpower Engine Oil SAE 10W-40 5L

Item number: 872259

£31.89
£31.89
£31.89
Mobil Super 2000 X1 Engine Oil 10W-40 EU-SW 5L
Mobil Super 2000 X1 Engine Oil 10W-40 EU-SW 5L
Mobil
Mobil Super 2000 X1 Engine Oil 10W-40 EU-SW 5L

Item number: 202211

£28.89
£28.89
£28.89
Mobil Super 2000 X1 Engine Oil 10W-40 1L
Mobil
Mobil Super 2000 X1 Engine Oil 10W-40 1L

Item number: 151188

£9.19
£9.19
£9.19

A slightly thicker oil at operating temperature, 10W-40 engine oil helps maintain oil pressure and reduce consumption in older petrol and diesel engines, and for higher-mileage vehicles where a thicker oil helps maintain pressure. Newer cars generally call for thinner grades such as 5W-30 or 0W-20, so check your owner's handbook or use our registration lookup before ordering.

This grade is also common in four-stroke motorcycles, where a single oil lubricates the engine, gearbox and wet clutch. Our range includes dedicated 4T 10W-40 motorcycle oil formulated to a JASO MA specification, alongside our car and light commercial options.

Most 10W-40 on the market is semi-synthetic, blending mineral and synthetic base oils to give dependable everyday protection at a sensible price. We also stock fully synthetic 10W-40 for engines that benefit from improved thermal stability and longer intervals between changes. You can compare the fully synthetic and semi-synthetic engine oil range if you are weighing up formulations.

Shop 10W-40 engine oil at FIXRA with free delivery on orders over £20 and next-day delivery options available. With a 60-day returns policy and Click & Collect options, keeping your vehicle serviced is straightforward.