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.
in 9 offers
The lowest price for Castrol 20W-50 GTX Engine Oil 5 Litre (3413901) right now is $38.00 at A1 Autoparts Niddrie, compared across 9 retailers.
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.
The all-time low was $21.13 on 16 Aug 2025 — today's price is 80% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 6 Aug 2026.
Last updated at 06/08/2026 10:34:26
Castrol GTX 20W50 Engine Oil - 5 Litre
Delivery between 11–19 Aug $18.05
Castrol Gtx 20W-50 Mineral Engine Oil 5L, 3413901
Delivery between 13–15 Aug $15
Castrol Gtx 20W-50 Mineral Engine Oil 5L, 3413901
GTX 20W-50 Engine Oil 5L - Castrol
Castrol Gtx Premium Mineral 20w-50 Engine Oil 5l 3413901
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 GTX 20W50 SL Engine Oil 5L 3413901 fits Ford Bronco 4.9 AWD Petrol SUV 09/85-12/86 126kw
Delivery between 7–19 Aug $10.95
Castrol Gtx 20W-50 5L
Castrol GTX Engine Oil, 20W-50, 5 Litres
Delivery between 11–13 Aug $9.99
Castrol 20W-50 Gtx Engine Oil 5 Litre (3413901)
Delivery between 13–15 Aug $8.80
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?
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.
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.
| Oil Composition | Mineral |
| SAE | 20W-50 |
| API | SN / CF |
Castrol GTX 20W50 Engine Oil - 5 Litre
Delivery between 11–19 Aug $18.05
Castrol Gtx 20W-50 Mineral Engine Oil 5L, 3413901
Delivery between 13–15 Aug $15
Castrol Gtx 20W-50 Mineral Engine Oil 5L, 3413901
GTX 20W-50 Engine Oil 5L - Castrol
Castrol Gtx Premium Mineral 20w-50 Engine Oil 5l 3413901
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!
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?
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.
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.
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.
Excellent price for great Oil. Great discount at 50 per cent off.
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.
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.
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.
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.
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
| Oil Composition | Mineral |
| SAE | 20W-50 |
| API | SN / CF |
