10 bestDiesel Oilsof August 2026
112M consumers helped this year.
10% off
1
Castrol EDGE 5W-30 LL, Advanced Fully Synthetic Engine Oil, Meets ACEA C3 & API SQ Specifications, 4L
Castrol
9.7
21% off
2
Castrol MAGNATEC 0W-30 C2 Engine Oil 4L
Castrol
9.4
16% off
3
Castrol EDGE 5W-40, Advanced Fully Synthetic Engine Oil, Meets ACEA C3 & API SN/CF Specifications, 4L
Castrol
9.1
13% off
4
Castrol MAGNATEC 5W-30 P Engine Oil, 5 Litre
Castrol
8.8
10% off
5
Castrol MAGNATEC 5W-30 A5 Engine Oil 5L
Castrol
8.5
Other
Mobil 1 ESP 5W30 Fully Synthetic Engine Oil 5L 5 Litres
MOTUL 106377 | MOTUL 8100 X-clean + 100% Synthetic Lubricant for Petrol & Diesel Vehicles - Euro 4, 5 & 6 | Viscosity SAE J 300, 5W-30 | 5 Litres
Motul 109471 | Motul 8100 X-clean EFE 100% Synthetic Lubricant for Petrol & Diesel Vehicles - Euro 4, 5 & 6 | Viscosity SAE J 300, 5W-30 | 5 Litres
Mobil 1 FS 0W-40, 1L
25% off
6
Castrol EDGE 5W-30 M, Advanced Fully Synthetic Engine Oil, Meets ACEA C3 & API SQ Specifications, 4L
Castrol
8.2
10% off
7
Castrol MAGNATEC 5W-30 C3 Engine Oil 4L
Castrol
7.9
8
Ultra 15W-40 Engine Oil Petrol & Diesel Mixed Fleet 20 Litre 20L
Smith & Allan
7.6
14% off
9
LIQUI MOLY Top Tec 4100 5W-40 | 5 L | Synthesis technology motor oil | SKU: 9511
Liqui Moly
7.3
10
MOTORWORLD Fully Synthetic C3 Engine Oil 5W-30 – Advanced Full Synthetic Motor Oil for Petrol & Diesel Engines, Low SAPS, ACEA C3 & API SP Approved – 5L
Motor World
7.0
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