Pro Gear GL-4 75W-90 is a premium Full Synthetic, Gear Oil manufactured from a blend of carefully selected Synthetic Base Oils. Formulated with the latest technology, purpose designed additives for long service Life and excellent load carrying capacity. It meets the performance requirements of API GL-4 Plus as well as many manufacturer requirements.
Pro Gear GL-4 75W-90 is a premium Full Synthetic, Gear Oil manufactured from a blend of carefully selected Synthetic Base Oils. Formulated with the latest technology, purpose designed additives for long service Life and excellent load carrying capacity. It meets the performance requirements of API GL-4 Plus as well as many manufacturer requirements.
Penrite Pro Gear Oil 75W-90 GL-4 2.5 Litre
Pro Gear GL-4 75W-90 is a premium Full Synthetic, Gear Oil manufactured from a blend of carefully selected Synthetic Base Oils. Formulated with the latest technology, purpose designed additives for long service Life and excellent load carrying capacity. It meets the performance requirements of API GL-4 Plus as well as many manufacturer requirements.
Pro Gear GL-4 75W-90 is a premium Full Synthetic, Gear Oil manufactured from a blend of carefully selected Synthetic Base Oils. Formulated with the latest technology, purpose designed additives for long service Life and excellent load carrying capacity. It meets the performance requirements of API GL-4 Plus as well as many manufacturer requirements.
in 13 offers
The lowest price for Penrite Pro Gear Oil 75W-90 GL-4 2.5 Litre right now is $73.50 at Sunbury Auto Parts, compared across 13 retailers.
The all-time low was $27.43 on 5 July 2025 — today's price is 168% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 29 Sept 2026.
Last updated at 29/09/2026 15:37:07
Penrite Pro Gear Oil GL-4 75W90 - 2.5Ltr
Free delivery between 6–14 Oct
Penrite Pro Gear GL-4 75W90 Full Synthetic Manual Transmission Oil 2.5L PROGL40025 fits Hyundai Accent II 1.5 G4EC-G FWD Petrol Hatchback 06/00-03/03
Delivery between 30 Sept – 13 Oct $10.95
Penrite Pro Gear GL4 75W-90 Gear Oil 2.5L - PROGL40025
Free delivery
Penrite Pro Gear GL4 75W-90 Gear Oil 2.5L - PROGL40025
Delivery $15
Penrite Full SYN Pro Gear GL-4 75W-90 Gear Differential Oil 2.5L - PROGL40025
Delivery between 6–8 Oct $15
Penrite Pro Gear GL4 75W-90 Gear Oil 2.5L fits TOYOTA COROLLA LEVIN 1.6 GT (AE101), 1.6 GT-Z (AE101), 1.6 (AE92)
Delivery between 6–14 Oct $9.90
Penrite Pro Gear Gl4 75w-90 Gear Oil 2.5l - Progl40025
Free delivery
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Penrite Pro Gear Oil GL-4 75W-90 2.5 Litre
Delivery between 2–8 Oct $9.99
Penrite Pro Gear GL-4 75W-90 Gear Oil 2.5L - PROGL40025
Delivery $12
Penrite Full Syn PRO GEAR GL-4 75W-90 Gear Differential Oil 2.5L PROGL40025
Free delivery between 6–14 Oct
originally posted on supercheapauto.com.au
I did a drain and fill 6 months ago at only 80,000km (I know, well before the scheduled maintenance period). Initially I noticed the shifting felt smooth however over the weeks shifting into first and second has gotten significantly harder, and sometimes second gear syncros have a very slow grind before pulling into gear, but only when cold which never happened. Get's better after 15 minutes of driving. I don't think Penrite makes bad oils, but some transmission can be picky about using OEM fluids so I will be buying OEM for next service.
originally posted on repco.com.au
There are many GL-5 gear oils but they are not suitable for my transmission. It is very small selection for 100% synthetic GL4 75w-90 Gear Oil. I use this oil and redline MT-90 which is also the same grade 100% synthetic GL4 75w-90. Both are very good for transmission.
originally posted on repco.com.au
This is good oil for a manual transmission gear which needs GL4 grade gear oil. This gear oil is 100% synthetic 75w-90 GL4. It is very hard to find the GL4 100% synthetic 75w-90 grade gear oil because most of gear oils are GL5 grade which suits for gears with LSD but it doesn't suit for a gear non LSD.
| Density at 15°C, kg/L | 0.887 |
| Viscosity, Kinematic, cSt at 40°C | 105 |
| Viscosity, Kinematic, cSt at 100°C | 17.4 |
| Viscosity Index | 180 |
| Viscosity, Brookfield, cSt @ -40° | 100,800 |
Penrite Pro Gear Oil GL-4 75W90 - 2.5Ltr
Free delivery between 6–14 Oct
Penrite Pro Gear GL-4 75W90 Full Synthetic Manual Transmission Oil 2.5L PROGL40025 fits Hyundai Accent II 1.5 G4EC-G FWD Petrol Hatchback 06/00-03/03
Delivery between 30 Sept – 13 Oct $10.95
Penrite Pro Gear GL4 75W-90 Gear Oil 2.5L - PROGL40025
Free delivery
Penrite Pro Gear GL4 75W-90 Gear Oil 2.5L - PROGL40025
Delivery $15
Penrite Full SYN Pro Gear GL-4 75W-90 Gear Differential Oil 2.5L - PROGL40025
Delivery between 6–8 Oct $15
I did a drain and fill 6 months ago at only 80,000km (I know, well before the scheduled maintenance period). Initially I noticed the shifting felt smooth however over the weeks shifting into first and second has gotten significantly harder, and sometimes second gear syncros have a very slow grind before pulling into gear, but only when cold which never happened. Get's better after 15 minutes of driving. I don't think Penrite makes bad oils, but some transmission can be picky about using OEM fluids so I will be buying OEM for next service.
There are many GL-5 gear oils but they are not suitable for my transmission. It is very small selection for 100% synthetic GL4 75w-90 Gear Oil. I use this oil and redline MT-90 which is also the same grade 100% synthetic GL4 75w-90. Both are very good for transmission.
This is good oil for a manual transmission gear which needs GL4 grade gear oil. This gear oil is 100% synthetic 75w-90 GL4. It is very hard to find the GL4 100% synthetic 75w-90 grade gear oil because most of gear oils are GL5 grade which suits for gears with LSD but it doesn't suit for a gear non LSD.
Fantastic oil for gear box and transfer case.After using i noticed a huge difference with the ease of changing gears and the over all smoother operation of the car.Great oil that made a noticeable difference to my landcruiser.
Gl-4 is exactly what I wanted for the gearbox of my vintage car. Mainly. it will not attack bronze or copper based components, as GL-5 is said to do.
Seems like a good product/brand based on other reviews. The pouring spout has a very thin threaded plastic cap which doesn't tighten that well because it's so thin and therefore leaks.Gearbox has developed a faint noise in neutral with clutch out, but owners manual does say that non-OEM fluids can produce different sounds so not necessarily a defect.
Used for my 3 gen Suzuki Jimny (2007), oh so smooth gear changes. Worth the money
This stuff is the only one you want for a front wheel drive gearbox. Yellow metal safe and it doesn't damage synchro's. Own a Mitsubishi manual transmission then is the stuff you want..mets or exceeds OEM for the triple diamond cog swapper specs. Pricey..YES..worth it...YES
Initially the transmission was quite rough and refused to shift without a fight. Although after 3months of casual driving (occasional pull) she shifts like butter and I could not be happier.
Went to Repco with the intention to buy the semi synthetic Penrite 75w90 but they had no stock so I went with the ProGear GL-4 instead, and im glad I did!Entirely changed the feel of my vehicle for the better and made the C60 box shift effortlessly.Gears with worn synchros almost never grind anymore either. Cannot recommend enough
| Density at 15°C, kg/L | 0.887 |
| Viscosity, Kinematic, cSt at 40°C | 105 |
| Viscosity, Kinematic, cSt at 100°C | 17.4 |
| Viscosity Index | 180 |
| Viscosity, Brookfield, cSt @ -40° | 100,800 |
