Hot Deals 
Cashback on everything
Filter Results
Car Engine Oils
Buy performance for your car at a great price with OnBuy's mineral, semi-synthetic, and fully synthetic car engine oil. Discover an innovative range that blends affordable engine maintenance with top-quality formulas to keep your car running smoothly with better energy efficiency and fuel economy. Shop OnBuy for free delivery on the best brands in car engine oil like Mannol, Castrol, Mobil, Carlube, and more!
Showing 1-60 of 600 results
Sort By:
- Popularity
- Average Rating
- Price (highest)
- Price (lowest)
- Newest
Ads
Hot
Price After Cashback£20.42
5% £1.07 cashback
Price After Cashback£24.04
5% £1.26 cashback
Price After Cashback£24.80
5% £1.31 cashback
Price After Cashback£103.53
5% £5.45 cashback
Price After Cashback£58.89
5% £3.10 cashbackPrice After Cashback£46.54
5% £2.45 cashbackPrice After Cashback£20.42
5% £1.07 cashbackPrice After Cashback£30.23
5% £1.59 cashbackPrice After Cashback£35.69
5% £1.88 cashbackPrice After Cashback£31.34
5% £1.65 cashbackPrice After Cashback£28.49
5% £1.50 cashbackPrice After Cashback£24.30
5% £1.28 cashbackPrice After Cashback£38.34
5% £2.02 cashbackPrice After Cashback£51.29
5% £2.70 cashbackPrice After Cashback£87.40
5% £4.60 cashbackPrice After Cashback£45.36
5% £2.39 cashbackPrice After Cashback£146.10
5% £7.69 cashbackPrice After Cashback£34.19
5% £1.80 cashbackPrice After Cashback£32.96
5% £1.73 cashbackPrice After Cashback£20.42
5% £1.07 cashbackPrice After Cashback£66.43
5% £3.50 cashbackPrice After Cashback£73.95
5% £3.89 cashbackPrice After Cashback£38.57
5% £2.03 cashbackPrice After Cashback£21.83
5% £1.15 cashbackPrice After Cashback£43.22
5% £2.27 cashbackPrice After Cashback£54.15
5% £2.85 cashbackPrice After Cashback£42.23
5% £2.22 cashbackPrice After Cashback£41.77
5% £2.20 cashbackPrice After Cashback£64.37
5% £3.39 cashbackPrice After Cashback£12.35
5% £0.65 cashbackPrice After Cashback£23.75
5% £1.25 cashbackPrice After Cashback£10.91
5% £0.57 cashbackPrice After Cashback£47.50
5% £2.50 cashbackPrice After Cashback£25.83
5% £1.36 cashbackPrice After Cashback£30.87
5% £1.62 cashbackPrice After Cashback£43.69
5% £2.30 cashbackPrice After Cashback£32.55
5% £1.71 cashbackPrice After Cashback£9.49
5% £0.50 cashbackPrice After Cashback£64.58
5% £3.40 cashbackPrice After Cashback£66.68
5% £3.51 cashbackPrice After Cashback£10.44
5% £0.55 cashbackPrice After Cashback£68.38
5% £3.60 cashbackPrice After Cashback£26.77
5% £1.41 cashbackPrice After Cashback£8.17
5% £0.43 cashbackPrice After Cashback£142.02
5% £7.47 cashbackPrice After Cashback£26.59
5% £1.40 cashbackPrice After Cashback£10.44
5% £0.55 cashbackPrice After Cashback£10.89
5% £0.57 cashbackPrice After Cashback£37.82
5% £1.99 cashbackPrice After Cashback£32.29
5% £1.70 cashbackPrice After Cashback£17.20
5% £0.91 cashbackPrice After Cashback£92.06
5% £4.85 cashbackPrice After Cashback£28.49
5% £1.50 cashbackPrice After Cashback£11.87
5% £0.62 cashbackPrice After Cashback£61.71
5% £3.25 cashbackPrice After Cashback£23.30
5% £1.23 cashbackPrice After Cashback£26.32
5% £1.39 cashbackPrice After Cashback£10.92
5% £0.57 cashbackPrice After Cashback£69.34
5% £3.65 cashbackPrice After Cashback£43.22
5% £2.27 cashbackOur highest rated car engine oils
![CASTROL Edge 5W-30 M - 4 Litre [15BF69]](https://cdn.onbuy.com/product/65aa4a5a559bf/500-500/castrol-edge-5w-30-m-4-litre-15bf69.jpg)
![CASTROL Edge 0W-30 - 4 Litre [1533EB]](https://cdn.onbuy.com/product/65aa4a66c9ce8/500-500/castrol-edge-0w-30-4-litre-1533eb.jpg)
![MOBIL Super 2000 X1 10W-40 - 5 Litre [151187]](https://cdn.onbuy.com/product/65aa4a65171b0/500-500/mobil-super-2000-x1-10w-40-5-litre-151187.jpg)
Looking to buy Car Engine Oils?
Whatever make and model you own, keep your car running smoothly on the road with OnBuy's range of car engine oil that will support a healthy motor and stave off any surprise trips to the garage.
Whether you've got a slightly older motor or a speedy sports car, it needs car engine oil to keep turning over day in, day out. You can turn to affordable options that still keep everything nicely lubricated while saving your bank balance, or prioritise performance with innovative formulas that prevent engine wear and deposits on slick and speedy motors.
What are the best brands of car engine oil?
It's hard to find a car engine oil that would let you down in the OnBuy range, but for superior fuel economy and maintenance for your motor you can't go wrong with the likes of Castrol engine oil. Whether it's their top-of-the-range Castrol EDGE, or the non-stop protection of Castrol MAGNATEC for cars that are on the go all day, every day, you'll get a premium product in every bottle.
Then there's the unbeatable value of Carlube, or the leading anti-friction properties of Mannol engine oils that will give you the peace of mind that your car will start every time, even in cold weather.
How do I choose the right car engine oil for my vehicle?
First things first, check your car owner's manual. It's vital that you get the right specification of car engine oil, otherwise you can end up causing serious problems that will result in an expensive trip to the garage.
Once you know that, it's then down to price vs performance - shop brands like Castrol for premium performance or get the protection your car needs at an affordable price with the likes of Mannol, Mobil, and Comma engine oil.
Customers love our best-selling Car Engine Oils
Price After Cashback£24.80
5% £1.31 cashbackPrice After Cashback£66.43
5% £3.50 cashbackPrice After Cashback£103.53
5% £5.45 cashbackPrice After Cashback£20.42
5% £1.07 cashbackPrice After Cashback£66.68
5% £3.51 cashbackPrice After Cashback£75.04
5% £3.95 cashbackPopular Brands in Car Engine Oils
