Buy wisely
Buy wiselyBuy wisely
For RetailersFor developers
  1. Home
  2. Grocery
  3. Pantry
  4. Oils & Vinegars
  5. Castrol 20W-50 GTX Engine Oil 5 Litre (3413901)
Buy wisely

BuyWisely is your one stop price comparison platform, delivering the best deals from over 5,000 online stores. 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
Best Buy
Amazon
Walmart
Target
Home Depot
Costco
Newegg
Lowe's
Contact Us
andrew@buywisely.com.au
Affiliate Disclosure
Legal Information
Privacy Policy
Logos provided by Logo.dev
Β© 2026 BuyWiselyβ€’Price data powered by pricesAPI.ioβ€’Retailers: SellWisely.io
Castrol 20W-50 GTX Engine Oil 5 Litre (3413901)
Castrol 20W-50 GTX Engine Oil 5 Litre (3413901)
Castrol 20W-50 GTX Engine Oil 5 Litre (3413901)
Castrol 20W-50 GTX Engine Oil 5 Litre (3413901)

Castrol 20W-50 GTX Engine Oil 5 Litre (3413901)

Castrol 20W-50 Gtx Engine Oil 5 LitreCastrol 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 20W-50 Gtx Engine Oil 5 LitreCastrol 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 20W-50 GTX Engine Oil 5 Litre (3413901)

Castrol 20W-50 Gtx Engine Oil 5 LitreCastrol 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 20W-50 Gtx Engine Oil 5 LitreCastrol 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.

Price comparison

Price data powered by pricesAPI.io

Last updated at 06/10/2026 12:37:59

Amazon.com.au

$40.85

Castrol GTX 20W-50 Engine Oil 5 Litre

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!

Automotive Superstore

$51.93

Castrol GTX 20W50 SL Engine Oil 5L 3413901 fits Mercedes-Benz E-Class E 300 T 4-matic (124.290) M 103.985 AWD Petrol Wagon 06/93-06/96 132kw

Delivery between 11–23 June $10.95

Supercheap Auto AU

$59.99

Castrol GTX Engine Oil, 20W-50, 5 Litres

Delivery between 15–18 June $9.99

Price history

Price history

Reviews

Bargains Always at Repco
27 November 2022Bargainmaster

originally posted on repco.com.au

I'm always looking for great prices for my XF Ford ute. The Castrol 20W50 oil and Z9 filter are the ideal package , and at a great price too. Why go anywhere else?

Best oil available for older engines
18 October 2020Max

originally posted on supercheapauto.com.au

GTX 20W-50 is the only high viscosity mineral oil with high zinc and high detergent qualities ideal for older low tolerance engines prone to sludging. It has fantastic anti-wear properties and maintains oil pressure under very high temperatures.I have found in reduces tappet/lifter noise in many engines I have used it in. My 3.9 Rover V8 has 459,000Km and has used this oil almost since new, it runs very smoothly and burns minimal oil. No sludge is visible on on the valve train either.

Do your own oil change
10 April 2023Pete

originally posted on supercheapauto.com.au

Perfect to change oil in my Lotus. Car had not started for 4 years so wanted to replace oil and build pressure on starter prior to firing engine.

Specification

Oil CompositionMineral
SAE20W-50
APISN / CF

Price comparison

Updated 1 day ago
Amazon.com.au

$40.85

Castrol GTX 20W-50 Engine Oil 5 Litre

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!

Automotive Superstore

$51.93

Castrol GTX 20W50 SL Engine Oil 5L 3413901 fits Mercedes-Benz E-Class E 300 T 4-matic (124.290) M 103.985 AWD Petrol Wagon 06/93-06/96 132kw

Delivery between 11–23 June $10.95

Supercheap Auto AU

$59.99

Castrol GTX Engine Oil, 20W-50, 5 Litres

Delivery between 15–18 June $9.99

Price history

Price history

Reviews

Bargains Always at Repco
27 November 2022

I'm always looking for great prices for my XF Ford ute. The Castrol 20W50 oil and Z9 filter are the ideal package , and at a great price too. Why go anywhere else?

Bargainmaster originally posted on repco.com.au
Best oil available for older engines
18 October 2020

GTX 20W-50 is the only high viscosity mineral oil with high zinc and high detergent qualities ideal for older low tolerance engines prone to sludging. It has fantastic anti-wear properties and maintains oil pressure under very high temperatures.I have found in reduces tappet/lifter noise in many engines I have used it in. My 3.9 Rover V8 has 459,000Km and has used this oil almost since new, it runs very smoothly and burns minimal oil. No sludge is visible on on the valve train either.

Max originally posted on supercheapauto.com.au
Do your own oil change
10 April 2023

Perfect to change oil in my Lotus. Car had not started for 4 years so wanted to replace oil and build pressure on starter prior to firing engine.

Pete originally posted on supercheapauto.com.au
GTX = Getting Too X
18 May 2023

Been using Castrol GTX since I first had a car, it's never failed to protect my old clunkers little thumpers right into their final resting place!40 years I've only owned 3 cars.

Von originally posted on supercheapauto.com.au
GTX Castrol Engine Oil. Special discount 50 % off.
2 March 2023

Excellent price for great Oil. Great discount at 50 per cent off.

Don Dimi originally posted on supercheapauto.com.au
GTX Engine Oil
1 September 2022

Great oil for all my cars. I have been using Castrol 20W-50 oils for over 20 years. I would recommend this oil to anyone looking for a high quality oil without the high price.

Milan originally posted on supercheapauto.com.au
Good mineral oil
19 November 2022

I have been using this oil for many years. It is good for old engines it is top quality and does not break down in rarely used engines. It has a anti sludge additive and mixes well with mineral based anti wear additives that are often used in rebuilding old engines.

miniskaff originally posted on ebay.com
Great Oil
9 September 2021

Did an oil change with penrite 20w60 as it stated it was an alternative to 20w50. My ute instantly ran like a pig and the idle was awful.Changed to Castrol 20w50 and the rough idle disappeared straight away and ute runs smooth again. Will keep using it.

Fontana originally posted on repco.com.au
Helped the Service
12 October 2020

Hi I had someone service my car and gave him bonus tin sigh for his Garage. The car is running great and I have 2 litres left for top ups.Used sticker with Castrol logo fornext service. I like Castrol the best and got in on sale at Super Cheap Auto.

Candice originally posted on supercheapauto.com.au
V2 motor oil brilliance
4 April 2023

Great oil for my V2 Harley-Davidson street 500 XG500. I won't use anything else.The team at Ballina Auto Barn are amazingly knowledgeable, friendly, & helpful staff

Luke W originally posted on autobarn.com.au

Specification

Oil CompositionMineral
SAE20W-50
APISN / CF