When lubrication under the most torturous conditions matters choose Castrol. Forged from over 100 years of product development and testing enables Castrol to offer you a complete range of oils, greases and speciality fluids for whatever you drive or rideFeatures Castrol Magnatec’s Intelligent Molecules also: Are combined with synthetic technology to provide increased protection in high and low temperature applications Provide continuous protection for all driving conditions, styles and temperatures Castrol Magnatec 5W-20 delivers superior performance under extreme cold start up conditions relative to thicker grades Whether punished under intense engine conditions, subjected to heat, pressure or varied environments, the range of Castrol quality engine oils, lubricants and greases have all been developed to stand up when needed. Utilising only the finest base oils and additives mean you get a premium product designed for its specific application and backed by decades of engineering and development.
When lubrication under the most torturous conditions matters choose Castrol. Forged from over 100 years of product development and testing enables Castrol to offer you a complete range of oils, greases and speciality fluids for whatever you drive or rideFeatures Castrol Magnatec’s Intelligent Molecules also: Are combined with synthetic technology to provide increased protection in high and low temperature applications Provide continuous protection for all driving conditions, styles and temperatures Castrol Magnatec 5W-20 delivers superior performance under extreme cold start up conditions relative to thicker grades Whether punished under intense engine conditions, subjected to heat, pressure or varied environments, the range of Castrol quality engine oils, lubricants and greases have all been developed to stand up when needed. Utilising only the finest base oils and additives mean you get a premium product designed for its specific application and backed by decades of engineering and development.
Castrol 20L MAGNATEC SP GF-6 5W-20 (3429066)
When lubrication under the most torturous conditions matters choose Castrol. Forged from over 100 years of product development and testing enables Castrol to offer you a complete range of oils, greases and speciality fluids for whatever you drive or rideFeatures Castrol Magnatec’s Intelligent Molecules also: Are combined with synthetic technology to provide increased protection in high and low temperature applications Provide continuous protection for all driving conditions, styles and temperatures Castrol Magnatec 5W-20 delivers superior performance under extreme cold start up conditions relative to thicker grades Whether punished under intense engine conditions, subjected to heat, pressure or varied environments, the range of Castrol quality engine oils, lubricants and greases have all been developed to stand up when needed. Utilising only the finest base oils and additives mean you get a premium product designed for its specific application and backed by decades of engineering and development.
When lubrication under the most torturous conditions matters choose Castrol. Forged from over 100 years of product development and testing enables Castrol to offer you a complete range of oils, greases and speciality fluids for whatever you drive or rideFeatures Castrol Magnatec’s Intelligent Molecules also: Are combined with synthetic technology to provide increased protection in high and low temperature applications Provide continuous protection for all driving conditions, styles and temperatures Castrol Magnatec 5W-20 delivers superior performance under extreme cold start up conditions relative to thicker grades Whether punished under intense engine conditions, subjected to heat, pressure or varied environments, the range of Castrol quality engine oils, lubricants and greases have all been developed to stand up when needed. Utilising only the finest base oils and additives mean you get a premium product designed for its specific application and backed by decades of engineering and development.
in 7 offers
The lowest price for Castrol 20L MAGNATEC SP GF-6 5W-20 (3429066) right now is $279.77 at Oila - Oil and Grease Centre, compared across 7 retailers.
The all-time low was $195.92 on 13 Oct 2024 — today's price is 43% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 5 Nov 2026.
Last updated at 05/11/2026 14:15:42
Castrol Magnatec 5W20_20L
Delivery between 6–13 Nov $22
MAGNATEC 5W-20 20L - Castrol
Delivery between 7–16 Nov $16.30
MAGNATEC 5W-20 20L - Shoalhaven Oil Supplies
Castrol Magnatec 5w-20 Engine Oil 20l 3429066
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Castrol Magnatec 5W-20 Engine Oil 20L - 3429066
Delivery $12
Castrol Magnatec 5W-20 Engine Oil 20L - 3429066
Free delivery
Castrol 20L Magnatec Sp Gf-6 5W-20
Delivery $8.80
| SAE viscosity class | 5W-20 |
| viscosity class | 5W-20 |
| Warranty | MD |
Castrol Magnatec 5W20_20L
Delivery between 6–13 Nov $22
MAGNATEC 5W-20 20L - Castrol
Delivery between 7–16 Nov $16.30
MAGNATEC 5W-20 20L - Shoalhaven Oil Supplies
Castrol Magnatec 5w-20 Engine Oil 20l 3429066
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Castrol Magnatec 5W-20 Engine Oil 20L - 3429066
Delivery $12
| SAE viscosity class | 5W-20 |
| viscosity class | 5W-20 |
| Warranty | MD |
