10 bestSynthetic Oilsof December 2025
112M consumers helped this year.
1
Shell Helix HX8 5W-30 API SN Plus Fully Synthetic Engine Oil for Petrol, Diesel & CNG Cars (3.5 L), medium
Shell
9.9
2
Castrol MAGNATEC STOP-START 5W-30 Full Synthetic Engine Oil for Petrol, Diesel and CNG Cars 3.5L
Castrol
9.8
3
Shell Helix Ultra 5W-40 Fully Synthetic Motor Oil for Diesel and Gasoline Engines (4 L)
Shell
9.7
4
Castrol Activ 20W-40 4T Synthetic Engine Oil for Bikes 1L |3X Protection | with Actibond Technology | Engine Protection for Bikes | JASO MA2
Castrol
9.5
5
Motul 104103 7100 4T Fully Synthetic 20W-50 Petrol Engine Oil for Bikes (1 L)
Motul
9.3
6
Shell Helix HX8 5W-30 API SN/CF, ACEA A3/B4 Fully Synthetic Engine Oil for Cars (5 L)
Shell
9.1
7
Castrol Activ 20W-40 4T Synthetic Engine Oil for Bikes 900ML |3X Protection | With Actibond Technology | Engine Protection for bikes | JASO MA2
Castrol
8.9
8
Mobil 1 0W-40 Advanced Full Synthetic Engine Oil (4L)
Mobil
8.7
9
Motul 8100 X-Cess 5W-40 API SN/CF Fully SynThetic Gasoline and Diesel Engine Oil (4 L) (104256)
Motul
8.5
10
Castrol MAGNATEC SUV 5W-40 A3/B4 Full Synthetic Engine Oil for Petrol, CNG and Diesel SUV 3.5L
Castrol
8.2
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