Last updated at 15/08/2026 16:53:14
Castrol Magnatec Diesel 15W-40 Semi Synthetic Engine Oil 5L
Castrol Magnatec Diesel 15W40 Engine Oil 10L - 3422638
Delivery $9
Castrol Magnatec Diesel 15W-40 Engine Oil 10L - 3422638
Delivery $12
Castrol Magnatec Diesel 15W-40 Semi Synthetic Engine Oil 10L
14-day returns
Castrol Magnatec Diesel Part Synthetic 15W-40 Engine Oil 10L 3422638 Diesel Petrol
Delivery $200
CASTROL MAGNATEC DIESEL 15W-40 10L
Delivery between 20–26 Aug $40
Magnatec Diesel 15w-40 Engine Oil 10l Powerful Lubrication Protection
Free delivery
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Castrol Magnatec 15W-40 Diesel Engine Oil 5L (3383364)
Delivery $8.80
originally posted on repco.com.au
Been using Castrol magnatec 15w40 in my 79 series for years at 5k intervals, great reasonably priced product,
originally posted on repco.com.au
It has only been 2 weeks but my car hasn’t blown up so can’t complain. Hard to review an engine oil without a lab test. Used to use Delo400 but can’t find that in QLD anymore. I have an MN Triton with a diesel that has its roots in the 80s and 90s so don’t feel I need some super duper synthetic. I replaced the oil myself along with a Ryco filter and a mechanic checked it a week later and said it looked ‘ok’. Fairly certain this is what a lot of the Mitsi dealers use for services.
originally posted on supercheapauto.com.au
I have used Castrol Diesel oil in Landcruisers for many years and have found it seems to hold its viscosity exceptionally well, I have rarely had to top up between services and never had any oil related issues. Magnatec also offers minimal wear from cold starts due to its adhesion ability.I think it’s good value for money.
| Product dimensions | 20 x 20 x 40 cm; 10 Kilograms |
| Country of origin | Thailand |
| Viscosity | 15w-40 |
| Liquid volume | 10 Litres |
| Vehicle service type | Car |
Castrol Magnatec Diesel 15W-40 Semi Synthetic Engine Oil 5L
Castrol Magnatec Diesel 15W40 Engine Oil 10L - 3422638
Delivery $9
Castrol Magnatec Diesel 15W-40 Engine Oil 10L - 3422638
Delivery $12
Castrol Magnatec Diesel 15W-40 Semi Synthetic Engine Oil 10L
14-day returns
Castrol Magnatec Diesel Part Synthetic 15W-40 Engine Oil 10L 3422638 Diesel Petrol
Delivery $200
Been using Castrol magnatec 15w40 in my 79 series for years at 5k intervals, great reasonably priced product,
It has only been 2 weeks but my car hasn’t blown up so can’t complain. Hard to review an engine oil without a lab test. Used to use Delo400 but can’t find that in QLD anymore. I have an MN Triton with a diesel that has its roots in the 80s and 90s so don’t feel I need some super duper synthetic. I replaced the oil myself along with a Ryco filter and a mechanic checked it a week later and said it looked ‘ok’. Fairly certain this is what a lot of the Mitsi dealers use for services.
I have used Castrol Diesel oil in Landcruisers for many years and have found it seems to hold its viscosity exceptionally well, I have rarely had to top up between services and never had any oil related issues. Magnatec also offers minimal wear from cold starts due to its adhesion ability.I think it’s good value for money.
Always use Castrol oils in my cars and 4x4's, have done for over 33 years. Never had any problems and the engines are still going well when I sell the vehicle.
I just rave about Castrol Magnatec Deisel. I believe that Magnetic oil of any sort for any car would be the best you can buy as it works from as soon as you turn the engine over
Disappointing! As usual took some old sump oil to exchange when I bought some new oil to do an oil change only to be told they can not take it because their oil drum is full, so had to cart it back home with me.
Castrol. Great quality Australian oil that does actually protects your engine. I won’t use anything else now. Magnatec is the oil for ALL my cars, and that’s that!! Oils ain’t Oils…
This one time I went fishing. Anyway, I needed this oil to power my vehicle. I got to the grocery store so quickly that when I got there they had run out of bananas!Anyway, great product
Seems to be a decent oil. As with all oils, they're not going to blow up your car the minute it's put in so only time will tell. Online research indicates that this is a decent oil, especially for an older diesel engine. Will likely stick to it provided all goes well.
I’ve used Castrol oils in my cars, motorcycles and lawn mowers for nearly 50 years and have never been disappointed with the engine protection they offer. This one’s no different. With just over 200k on our 2013 Prado it keeps the engine clean and in excellent condition and still returning excellent fuel economy.
| Product dimensions | 20 x 20 x 40 cm; 10 Kilograms |
| Country of origin | Thailand |
| Viscosity | 15w-40 |
| Liquid volume | 10 Litres |
| Vehicle service type | Car |
Castrol MAGNATEC Diesel 15W40 Engine Oil 10L - 3422638
Castrol Magnatec Diesel 15W-40 Engine Oil Castrol Magnatec Diesel 15W-40 Engine Oil combines dedicated diesel technology with intelligent molecules for a stronger layer of protection, reducing wear during the critical warm-up period. Metal on metal contact is the enemy of any engine and lubrication and oil coverage of internal moving parts is critical. Castrol have developed their range of Magnatec engine oil to cling tenaciously to your engine components even when the engine is off to provide that level of protection that other oils don't. Offering instant lubrication as soon as you turn the key, Castrol Magnatec's intelligent molecules are present throughout all driving conditions to dramatically reduce engine wear and provide vital protection. For as long as many of us remember, cars using Castrol products and adorned with iconic Castrol livery have dominated motorsport. Whether it be Larry Perkins winning Bathurst in '93 in his VP Commodore or Victor Bray chasing down quarter mile records in his '55 Chevy Doorslammer, Castrol have been at the forefront of oil and lubricant research and development. Forged in the heat of battle, Castrol lubricants have helped power WRC Celicas and GT series Supras to wins in some of the most competitive and gruelling motorsport competitions. It is with this knowledge and experience that you know you are using the best when you use Castrol oils and lubrication in your vehicle. Trusted by top level motorsport teams and with a presence in Australasia for over 100 years you can rely on Castrol to protect and enhance the performance of your vehicle. Browse online using our handy Rego Search tool to find the best Castrol oils for your application or come in store today and speak to one of our friendly staff. Changing your engine oil will also need you changing your oil filter to fully protect you engine and maximise the performance of your Castrol oil. When it comes to Oils and Fluids, the range doesn't just stop at Magnatec, GTX or Edge, Repco stock a range of quality Castrol Grease, Transmission Fluid, Gear Oil, Lawnmower and Motorbike Oil, Marine Oil and Additives all designed to protect and maximise the performance of any application.
Castrol Magnatec Diesel 15W-40 Engine Oil Castrol Magnatec Diesel 15W-40 Engine Oil combines dedicated diesel technology with intelligent molecules for a stronger layer of protection, reducing wear during the critical warm-up period. Metal on metal contact is the enemy of any engine and lubrication and oil coverage of internal moving parts is critical. Castrol have developed their range of Magnatec engine oil to cling tenaciously to your engine components even when the engine is off to provide that level of protection that other oils don't. Offering instant lubrication as soon as you turn the key, Castrol Magnatec's intelligent molecules are present throughout all driving conditions to dramatically reduce engine wear and provide vital protection. For as long as many of us remember, cars using Castrol products and adorned with iconic Castrol livery have dominated motorsport. Whether it be Larry Perkins winning Bathurst in '93 in his VP Commodore or Victor Bray chasing down quarter mile records in his '55 Chevy Doorslammer, Castrol have been at the forefront of oil and lubricant research and development. Forged in the heat of battle, Castrol lubricants have helped power WRC Celicas and GT series Supras to wins in some of the most competitive and gruelling motorsport competitions. It is with this knowledge and experience that you know you are using the best when you use Castrol oils and lubrication in your vehicle. Trusted by top level motorsport teams and with a presence in Australasia for over 100 years you can rely on Castrol to protect and enhance the performance of your vehicle. Browse online using our handy Rego Search tool to find the best Castrol oils for your application or come in store today and speak to one of our friendly staff. Changing your engine oil will also need you changing your oil filter to fully protect you engine and maximise the performance of your Castrol oil. When it comes to Oils and Fluids, the range doesn't just stop at Magnatec, GTX or Edge, Repco stock a range of quality Castrol Grease, Transmission Fluid, Gear Oil, Lawnmower and Motorbike Oil, Marine Oil and Additives all designed to protect and maximise the performance of any application.
Castrol Magnatec Diesel 15W-40 Engine Oil Castrol Magnatec Diesel 15W-40 Engine Oil combines dedicated diesel technology with intelligent molecules for a stronger layer of protection, reducing wear during the critical warm-up period. Metal on metal contact is the enemy of any engine and lubrication and oil coverage of internal moving parts is critical. Castrol have developed their range of Magnatec engine oil to cling tenaciously to your engine components even when the engine is off to provide that level of protection that other oils don't. Offering instant lubrication as soon as you turn the key, Castrol Magnatec's intelligent molecules are present throughout all driving conditions to dramatically reduce engine wear and provide vital protection. For as long as many of us remember, cars using Castrol products and adorned with iconic Castrol livery have dominated motorsport. Whether it be Larry Perkins winning Bathurst in '93 in his VP Commodore or Victor Bray chasing down quarter mile records in his '55 Chevy Doorslammer, Castrol have been at the forefront of oil and lubricant research and development. Forged in the heat of battle, Castrol lubricants have helped power WRC Celicas and GT series Supras to wins in some of the most competitive and gruelling motorsport competitions. It is with this knowledge and experience that you know you are using the best when you use Castrol oils and lubrication in your vehicle. Trusted by top level motorsport teams and with a presence in Australasia for over 100 years you can rely on Castrol to protect and enhance the performance of your vehicle. Browse online using our handy Rego Search tool to find the best Castrol oils for your application or come in store today and speak to one of our friendly staff. Changing your engine oil will also need you changing your oil filter to fully protect you engine and maximise the performance of your Castrol oil. When it comes to Oils and Fluids, the range doesn't just stop at Magnatec, GTX or Edge, Repco stock a range of quality Castrol Grease, Transmission Fluid, Gear Oil, Lawnmower and Motorbike Oil, Marine Oil and Additives all designed to protect and maximise the performance of any application.
Castrol Magnatec Diesel 15W-40 Engine Oil Castrol Magnatec Diesel 15W-40 Engine Oil combines dedicated diesel technology with intelligent molecules for a stronger layer of protection, reducing wear during the critical warm-up period. Metal on metal contact is the enemy of any engine and lubrication and oil coverage of internal moving parts is critical. Castrol have developed their range of Magnatec engine oil to cling tenaciously to your engine components even when the engine is off to provide that level of protection that other oils don't. Offering instant lubrication as soon as you turn the key, Castrol Magnatec's intelligent molecules are present throughout all driving conditions to dramatically reduce engine wear and provide vital protection. For as long as many of us remember, cars using Castrol products and adorned with iconic Castrol livery have dominated motorsport. Whether it be Larry Perkins winning Bathurst in '93 in his VP Commodore or Victor Bray chasing down quarter mile records in his '55 Chevy Doorslammer, Castrol have been at the forefront of oil and lubricant research and development. Forged in the heat of battle, Castrol lubricants have helped power WRC Celicas and GT series Supras to wins in some of the most competitive and gruelling motorsport competitions. It is with this knowledge and experience that you know you are using the best when you use Castrol oils and lubrication in your vehicle. Trusted by top level motorsport teams and with a presence in Australasia for over 100 years you can rely on Castrol to protect and enhance the performance of your vehicle. Browse online using our handy Rego Search tool to find the best Castrol oils for your application or come in store today and speak to one of our friendly staff. Changing your engine oil will also need you changing your oil filter to fully protect you engine and maximise the performance of your Castrol oil. When it comes to Oils and Fluids, the range doesn't just stop at Magnatec, GTX or Edge, Repco stock a range of quality Castrol Grease, Transmission Fluid, Gear Oil, Lawnmower and Motorbike Oil, Marine Oil and Additives all designed to protect and maximise the performance of any application.
in 8 offers
The lowest price for Castrol MAGNATEC Diesel 15W40 Engine Oil 10L - 3422638 right now is $72.99 at autopro.com.au, compared across 8 retailers.
The all-time low was $49.00 on 31 Dec 2025 — today's price is 49% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 15 Aug 2026.
