Buy wisely
Buy wiselyBuy wisely
For RetailersFor developers
  1. Home
  2. Health & Beauty
  3. Hair Care
  4. Conditioner
  5. Castrol 15W-40 Ci-4/E7 RX Diesel Engine Oil 7 L
Buy wisely

BuyWisely is your one stop price comparison platform, delivering the best deals from over 20,000 online shops. We empower shoppers to make smart, cost-effective choices by offering transparent pricing, price history, and the latest deals across a broad range of products. With BuyWisely, your money goes further.

Popular Shops
JB Hi-Fi
The Good Guys
Harvey Norman
Appliances Online
Bing Lee
Kogan
Amazon
Officeworks
Contact Us
[email protected]
Affiliate Disclosure
Legal Information
Privacy Policy
Logos provided by Logo.dev
© 2026 BuyWisely•Price data powered by pricesAPI.io•Retailers: SellWisely.io
- 38%
Castrol 15W-40 Ci-4/E7 RX Diesel Engine Oil 7 L
Castrol 15W-40 Ci-4/E7 RX Diesel Engine Oil 7 L
Castrol 15W-40 Ci-4/E7 RX Diesel Engine Oil 7 L

Castrol 15W-40 Ci-4/E7 RX Diesel Engine Oil 7 L

(105 reviews)

Castrol 15W-40 Ci-4/E7 RX Diesel Engine Oil 7 L

$62.40

(105 reviews)

Castrol Diesel Rx 15W-40 Ci-4 E7 Engine Oil 7LCastrol is here to serve every driver, every motorcyclist and every industry on Earth. That means creating high performance oils, lubricants, fluids and greases for every application you can imagine.

Castrol Diesel Rx 15W-40 Ci-4 E7 Engine Oil 7LCastrol is here to serve every driver, every motorcyclist and every industry on Earth. That means creating high performance oils, lubricants, fluids and greases for every application you can imagine.

Castrol Diesel Rx 15W-40 Ci-4 E7 Engine Oil 7LCastrol is here to serve every driver, every motorcyclist and every industry on Earth. That means creating high performance oils, lubricants, fluids and greases for every application you can imagine.

Castrol Diesel Rx 15W-40 Ci-4 E7 Engine Oil 7LCastrol is here to serve every driver, every motorcyclist and every industry on Earth. That means creating high performance oils, lubricants, fluids and greases for every application you can imagine.

$62.40 - $111.68

in 9 offers

The lowest price for Castrol 15W-40 Ci-4/E7 RX Diesel Engine Oil 7 L right now is $62.40 at Eyre Trading, compared across 9 retailers.

The all-time low was $38.99 on 19 Nov 2025 — today's price is 60% above the lowest ever. It has been notably cheaper before — worth setting a price alert.

Prices last updated 3 Nov 2026.

Size:

5 L
7 L

Volume:

5.28 US gal
54.16 US gal

Price comparison

Price data powered by pricesAPI.io

Last updated at 03/11/2026 23:25:29

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
https://www.google.com/s2/favicons?domain=eyretrading.com.au&sz=64Eyre Trading

$62.40

RX DIESEL 15W/40 7L

Free delivery by 16 Nov

https://www.google.com/s2/favicons?domain=thebossshop.com.au&sz=64The Boss Shop

$69.91

RX DIESEL 15W-40 CI-4/E7 7L

Delivery between 9–17 Nov $25

https://www.google.com/s2/favicons?domain=micksgonebush.com.au&sz=64Micks Gone Bush

$84.24

Castrol Diesel Rx 15W-40 Ci-4 E7 Engine Oil 7L 3420724

Delivery $20

https://www.google.com/s2/favicons?domain=checkout.4wd247.com&sz=644wd247.com

$91.00

Castrol RX Diesel Engine Oil 15W-40 7L - 3420724

Delivery $9

https://www.google.com/s2/favicons?domain=universalautospares.com.au&sz=64Universal Auto Spares

$97.99

RX Diesel 15W-40 CI-4/E7 7L - Castrol

Delivery between 5–13 Nov $15.39

https://www.google.com/s2/favicons?domain=autobarn.com.au&sz=64Autobarn

$106.99

Castrol Rx Diesel 15W-40 Ci-4 Diesel Engine Oil 7L, 3420724

Delivery between 9–12 Nov $15

https://www.google.com/s2/favicons?domain=autopro.com.au&sz=64autopro.com.au

$106.99

Castrol Rx Diesel 15W-40 Ci-4 Diesel Engine Oil 7L, 3420724

https://www.google.com/s2/favicons?domain=autoone.com.au&sz=64Auto One Australia

$107.00

Castrol Mineral RX Diesel Engine Oil 15W-40 CI-4 E7 Heavy Duty 7L 3420724 Multi Purpose Diesel Oil

Delivery $14

https://www.google.com/s2/favicons?domain=rolan.com.au&sz=64Rolan Australia

$111.68

Castrol Diesel Rx 15W-40 Ci-4 E7 Engine Oil 7L

Delivery $8.80

Price history

Price history

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.

Reviews

All good
1 February 2020Mick

originally posted on supercheapauto.com.au

Happy days for the amount of litres for service Considering most details take 6 or 7 Litres not five Perfect for a service

Great features
14 April 2020kel

originally posted on supercheapauto.com.au

I have used is oil in my mercedes benz vito van and have found it has eliminated sooting up the engine completely

Specification

Form ConfigurationOil
FormLiquid
MaterialMineral Oil
Viscosity15W-40
Operating TemperatureHigh-temperature conditions

Price comparison

Updated 3 days ago
Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
https://www.google.com/s2/favicons?domain=eyretrading.com.au&sz=64
Eyre Trading

$62.40

RX DIESEL 15W/40 7L

Free delivery by 16 Nov

https://www.google.com/s2/favicons?domain=thebossshop.com.au&sz=64
The Boss Shop

$69.91

RX DIESEL 15W-40 CI-4/E7 7L

Delivery between 9–17 Nov $25

https://www.google.com/s2/favicons?domain=micksgonebush.com.au&sz=64
Micks Gone Bush

$84.24

Castrol Diesel Rx 15W-40 Ci-4 E7 Engine Oil 7L 3420724

Delivery $20

https://www.google.com/s2/favicons?domain=checkout.4wd247.com&sz=64
4wd247.com

$91.00

Out of stock

Castrol RX Diesel Engine Oil 15W-40 7L - 3420724

Delivery $9

https://www.google.com/s2/favicons?domain=universalautospares.com.au&sz=64
Universal Auto Spares

$97.99

RX Diesel 15W-40 CI-4/E7 7L - Castrol

Delivery between 5–13 Nov $15.39

Price history

Price history

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.

Reviews

All good
1 February 2020

Happy days for the amount of litres for service Considering most details take 6 or 7 Litres not five Perfect for a service

Mick originally posted on supercheapauto.com.au
Great features
14 April 2020

I have used is oil in my mercedes benz vito van and have found it has eliminated sooting up the engine completely

kel originally posted on supercheapauto.com.au

Specification

Form ConfigurationOil
FormLiquid
MaterialMineral Oil
Viscosity15W-40
Operating TemperatureHigh-temperature conditions

You may also like

Castrol Magnatec Diesel 15W-40 Engine Oil 5 L
Castrol Magnatec Diesel 15W-40 Engine Oil 5 L$60.74 - $224.13
★★★★★★★★★★
309
Compare 11 offers
- 9%
Castrol GTX 15W-40 Diesel Engine Oil 10 L
Castrol GTX 15W-40 Diesel Engine Oil 10 L$89.90 - $175.00
Compare 10 offers
Castrol 15W-40 CJ-4 E9 RX Super Engine Oil 5 L
Castrol 15W-40 CJ-4 E9 RX Super Engine Oil 5 L$57.00 - $105.11
★★★★★★★★★★
165
Compare 9 offers
Valvoline Super Diesel 15W-40 Engine Oil 5 L
Valvoline Super Diesel 15W-40 Engine Oil 5 L$48.05 - $86.95
★★★★★★★★★★
962
Compare 14 offers
Castrol Magnatec DX 5W-40 Diesel Engine Oil 5 L
Castrol Magnatec DX 5W-40 Diesel Engine Oil 5 L$61.20 - $163.16
★★★★★★★★★★
128
Compare 16 offers