It is suitable for use in high speed 4-stroke diesel engines that use a broad range of fuel qualities. It is compatible with diesel engines fitted with EGR and the latest exhaust after treatment systems such as; DPF, DOC and/or SCR. Recommended for use in all naturally aspirated and turbocharged diesel engines fitted in trucks, tractors, buses, LCV’s and off-highway equipment, agricultural and fixed plant machinery. One of the main causes of damage in modern engines is abrasive wear. Castrol RX Super 15W-40 CJ-4/E9 with DuraShield Boosters is proven in industry testing to provide protection to your engine in two ways: Under severe engine operating conditions soot can agglomerate to form large particles which displace oil on moving metal surfaces and results in metal to metal contact. DuraShieldTM Boosters helps to prevent the agglomeration of soot as well as protecting surfaces from wear. Provides a protective layer on the moving metal surfaces which resists break down even under difficult conditions.
It is suitable for use in high speed 4-stroke diesel engines that use a broad range of fuel qualities. It is compatible with diesel engines fitted with EGR and the latest exhaust after treatment systems such as; DPF, DOC and/or SCR. Recommended for use in all naturally aspirated and turbocharged diesel engines fitted in trucks, tractors, buses, LCV’s and off-highway equipment, agricultural and fixed plant machinery. One of the main causes of damage in modern engines is abrasive wear. Castrol RX Super 15W-40 CJ-4/E9 with DuraShield Boosters is proven in industry testing to provide protection to your engine in two ways: Under severe engine operating conditions soot can agglomerate to form large particles which displace oil on moving metal surfaces and results in metal to metal contact. DuraShieldTM Boosters helps to prevent the agglomeration of soot as well as protecting surfaces from wear. Provides a protective layer on the moving metal surfaces which resists break down even under difficult conditions.
in 14 offers
last seen 27 Oct 2026
The lowest price we last saw for Castrol 15W-40 CJ-4 E9 RX Super Engine Oil 7 L was $71.40 at A1 Autoparts Niddrie, compared across 13 retailers (last seen 27 Oct 2026). Prices may have changed since.
The all-time low we recorded was $49.91 on 9 Sept 2024.
Prices last updated 27 Oct 2026.
Castrol 15W-40 CJ-4 E9 RX Super Engine Oil 7 L
It is suitable for use in high speed 4-stroke diesel engines that use a broad range of fuel qualities. It is compatible with diesel engines fitted with EGR and the latest exhaust after treatment systems such as; DPF, DOC and/or SCR. Recommended for use in all naturally aspirated and turbocharged diesel engines fitted in trucks, tractors, buses, LCV’s and off-highway equipment, agricultural and fixed plant machinery. One of the main causes of damage in modern engines is abrasive wear. Castrol RX Super 15W-40 CJ-4/E9 with DuraShield Boosters is proven in industry testing to provide protection to your engine in two ways: Under severe engine operating conditions soot can agglomerate to form large particles which displace oil on moving metal surfaces and results in metal to metal contact. DuraShieldTM Boosters helps to prevent the agglomeration of soot as well as protecting surfaces from wear. Provides a protective layer on the moving metal surfaces which resists break down even under difficult conditions.
It is suitable for use in high speed 4-stroke diesel engines that use a broad range of fuel qualities. It is compatible with diesel engines fitted with EGR and the latest exhaust after treatment systems such as; DPF, DOC and/or SCR. Recommended for use in all naturally aspirated and turbocharged diesel engines fitted in trucks, tractors, buses, LCV’s and off-highway equipment, agricultural and fixed plant machinery. One of the main causes of damage in modern engines is abrasive wear. Castrol RX Super 15W-40 CJ-4/E9 with DuraShield Boosters is proven in industry testing to provide protection to your engine in two ways: Under severe engine operating conditions soot can agglomerate to form large particles which displace oil on moving metal surfaces and results in metal to metal contact. DuraShieldTM Boosters helps to prevent the agglomeration of soot as well as protecting surfaces from wear. Provides a protective layer on the moving metal surfaces which resists break down even under difficult conditions.
Last updated at 27/10/2026 04:07:58
Castrol RX Super 15W40 Engine Oil - 7 Litre
Delivery between 30 Oct – 9 Nov $22.10
RX SUPER 15W-40 CJ-4/E9 7L
Delivery between 2–10 Nov $25
Castrol Rx Super 15W-40 7L
CASTROL RX SUPER 15W-40 CJ-4/E9 7L
Delivery between 30 Oct – 5 Nov $40
Castrol RX Super Engine Oil 15W40 CJ4/E9 7L 3420723 fits Iveco Daily III 40 C 13 8140.43S RWD Diesel Cab Chassis 05/99-04/06 92kw
Delivery between 28 Oct – 9 Nov $10.95
Castrol RX Super Engine Oil 15W40 CJ4/E9 7L 3420723 | 15W-40 | Diesel | 7L | 3420723
Delivery $8.95
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Castrol 15W-40 CJ-4 E9 RX Super Engine Oil 7 Litre 3420723
Delivery $20
RX Super 15W-40 CJ-4/E9 7L - Castrol
Delivery between 28 Oct – 5 Nov $15.39
Castrol RX Super CJ-4/E9 15W-40 Engine Oil 7L - 3420723
Delivery $12
Castrol Rx Super 15W-40 Cj-4 Diesel Engine Oil 7L, 3420723
Delivery between 31 Oct – 3 Nov $15
originally posted on supercheapauto.com.au
Great oil for older turbo diesel. Have been using this oil for 20 years
originally posted on repco.com.au
Oils ain’t oils, I chose this product because it is a name I trust in engine oils, and have used Castrol for over 30 years.
originally posted on autobarn.com.au
Always use castrol in my LN106. Afterpay available on their website makes doing services easy and affordable. Castrol oil at Autobarn is always cheaper than other well known autostores. Also bought an oilfilter to go with and autobarn always stock and cater parts for older vehicles like mine. One stop shop always when i go here.
| Viscosity | 15W-40 |
| Form Configuration | Oil |
| Form | Liquid |
| Intended Use | Automotive, Lubrication |
| Specific Application | Engine parts |
Castrol RX Super 15W40 Engine Oil - 7 Litre
Delivery between 30 Oct – 9 Nov $22.10
RX SUPER 15W-40 CJ-4/E9 7L
Delivery between 2–10 Nov $25
Castrol Rx Super 15W-40 7L
CASTROL RX SUPER 15W-40 CJ-4/E9 7L
Delivery between 30 Oct – 5 Nov $40
Castrol RX Super Engine Oil 15W40 CJ4/E9 7L 3420723 fits Iveco Daily III 40 C 13 8140.43S RWD Diesel Cab Chassis 05/99-04/06 92kw
Delivery between 28 Oct – 9 Nov $10.95
Great oil for older turbo diesel. Have been using this oil for 20 years
Oils ain’t oils, I chose this product because it is a name I trust in engine oils, and have used Castrol for over 30 years.
Always use castrol in my LN106. Afterpay available on their website makes doing services easy and affordable. Castrol oil at Autobarn is always cheaper than other well known autostores. Also bought an oilfilter to go with and autobarn always stock and cater parts for older vehicles like mine. One stop shop always when i go here.
The 5t litre containers of Castrol RX super were better buy, 7 litre too big quantity. Also don’t think much of plastic seal on inside cap, when u open seal bits plastic can drop in oil then motor which not good for engine, especially if pouring oil from container into motor, piece plastic drops into motor, imagine damage if didn’t know that happened, used extensively super for years but no more. Very bad design of cap, what wrong with 5 litre with plastic cap seal
I have used Castrol RX Super 15W-40 in my Toyota. It has 300,0000 klm on the odometer. I have always specified this oil at every service
I have used this product for 27 years of owning my Daihatsu tipper and is original engine without a rebuild. Oils just ain’t oils.
Worked fantastic to cook my Chicken Schnitzels.. a little bit thicker than what I am used to using but all in all a nice even cook
Great oil but the price in not justified especially since this is just a good quality mineral oil not a synthetic oil. Does a good job for the old sooty engine but will not last past 6000kms if you not a common rail engine so a bit expensive.
Its Diesel Engine Oil as recommended by Cummins Australia
A high quality product at a competitive price and commendable service from staff.
| Viscosity | 15W-40 |
| Form Configuration | Oil |
| Form | Liquid |
| Intended Use | Automotive, Lubrication |
| Specific Application | Engine parts |
