Ravenol RHP 75W-90 USVO Racing Differential Oil – 1L
Ravenol RHP Racing High Performance 75W-90 is our premium full-synthetic differential oil for traditional Defender, Discovery 1 and Discovery 2 axles, combining high-load protection with exceptional cold flow. Its PAO base oils and Ravenol USVO technology give RHP unusually stable viscosity across temperature: 92.6 mm²/s at 40°C, 16.1 mm²/s at 100°C and a viscosity index of 188.
- PAO-based fully synthetic 75W-90 gear oil with Ravenol USVO technology
- High load-carrying capacity, excellent EP protection and outstanding shear stability
- Limited-slip characteristics for compatible locking and limited-slip differentials
- Supplied in a 1L bottle with easy-pour spout
RHP sits at the top of our differential-oil range for hard-used Land Rovers, particularly where towing, higher engine output, sustained motorway use, expedition work, off-road driving or competition places greater demands on the axle oil.
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Description
Ravenol RHP Racing High Performance Gear SAE 75W-90 sits at the top of our differential-oil range for traditional Land Rover axles. Developed as a PAO-based fully synthetic racing gear oil with Ravenol USVO technology, RHP combines exceptional viscosity stability with high load-carrying capacity, excellent EP wear protection, outstanding shear stability and low foaming. Ravenol specifically formulates RHP with limited-slip properties and recommends it for highly loaded rear axles with integrated locking differentials; Twinwoods stocks it as a premium differential oil for Defender, Discovery 1 and Discovery 2 axles, including standard open differentials and compatible locking or limited-slip units.
Why RHP Works So Well in a Land Rover Differential
75W-90 can sound like a thinner modern oil compared with the traditional 80W-90 normally associated with Land Rover axles, but the actual viscosity data tells a very different story. RHP measures 92.6 mm²/s at 40°C and 16.1 mm²/s at 100°C, with a viscosity index of 188. Ravenol EPX mineral 80W-90 measures 130.3 mm²/s at 40°C but 14.3 mm²/s at 100°C, with a viscosity index of 108.
RHP is considerably less viscous while the axle is warming up, yet is actually more viscous at 100°C. That is probably the clearest demonstration of what its PAO and USVO formulation achieves. The oil does not need to be extremely heavy at lower temperatures simply to retain substantial SAE 90 viscosity once the differential becomes hot.
A viscosity index of 188 is exceptionally high for a gear oil and explains how RHP can combine much better cold flow with substantial SAE 90 viscosity when hot. RHP remains more viscous than EPX at 100°C, while Ravenol separately specifies high load-carrying capacity and a high-pressure-stable lubricating film under high oil temperatures and loads. Those are related advantages, but they are not the same claim: viscosity-temperature stability comes from the measurable viscosity data, while load and film performance are part of Ravenol’s stated formulation characteristics.
| Property | Ravenol RHP 75W-90 | Ravenol EPX 80W-90 GL-5 |
|---|---|---|
| Oil type | PAO-based fully synthetic, USVO | Mineral |
| Viscosity at 40°C | 92.6 mm²/s | 130.3 mm²/s |
| Viscosity at 100°C | 16.1 mm²/s | 14.3 mm²/s |
| Viscosity Index | 188 | 108 |
| Brookfield viscosity | 33,800 mPa·s at -40°C | 60,100 mPa·s at -26°C |
| Pour point | -57°C | -33°C |
The Brookfield figures are measured at different temperatures, so they are not a direct numerical comparison. What they do show is the exceptional low-temperature behaviour of RHP: it remains highly fluid even at a test temperature 14°C lower than that used for the conventional mineral 80W-90.
High-Load Protection Without Sacrificing Cold Flow
A Land Rover differential needs far more than the correct nominal viscosity. The hypoid gears operate under high sliding loads, while the crownwheel constantly churns the oil and the complete axle can become very hot during prolonged hard use. Ravenol specifies RHP for a high-pressure-stable lubricating film at high oil temperatures and loads, together with outstanding shear stability, excellent thermal stability, excellent EP properties, high load-carrying capacity and very good wear protection.
That combination is what makes RHP particularly interesting for a Land Rover. It flows far more readily at low temperatures than a conventional mineral 80W-90, maintains exceptional viscosity stability as temperature rises, and is separately formulated to cope with the pressure, shear and heat generated inside highly loaded differentials.
The foam-control data is equally strong. ASTM D892 results are 0/0, 10/0 and 0/0 through the three test sequences, with no foam remaining after settling. That matters in a differential where the rotating crownwheel is continuously agitating the lubricant and the oil needs to remain consistent rather than becoming heavily aerated.
RHP also records a 1b copper-strip corrosion result at 121°C. Ravenol states good compatibility with non-ferrous metals and sealing materials, alongside strong ageing and oxidation resistance. The result is a racing-derived oil whose advantages for a Land Rover differential can be seen in the published engineering data rather than relying on motorsport branding alone.
Land Rover Differential Use
- Defender front and rear differentials
- Discovery 1 front and rear differentials
- Discovery 2 front and rear differentials
- Other traditional Land Rover hypoid axles requiring this viscosity and type of differential lubricant
- Standard open differentials
- Compatible locking and limited-slip differentials
- Hard-used vehicles including towing, higher engine output, sustained motorway use, expedition and off-road work
- Competition and other high-load axle use
Conventional mineral EP gear oil remains entirely suitable for routine Land Rover differential servicing. RHP goes considerably further: a PAO full-synthetic oil with markedly better viscosity-temperature stability, exceptional cold-flow behaviour and a formulation developed specifically around high loads, shear stability, EP protection and temperature control.
Product Specification
| Specification | Details |
|---|---|
| Product | Ravenol RHP Racing High Performance Gear SAE 75W-90 |
| Viscosity | SAE 75W-90 |
| Oil type | PAO-based fully synthetic |
| Technology | Ravenol USVO |
| Differential characteristics | Limited-slip properties, high load-carrying capacity, EP wear protection and low foaming |
| Pack size | 1L |
| Container | Easy-pour spout |
| Manufacturer article number | 1145100-001 |
Technical Product Data
| Property | Unit | Data | Audit |
|---|---|---|---|
| Colour | Gold | VISUELL | |
| Foaming tendency | . | DIN 51757 | |
| Seq. I at 24 °C | ml/ml | 0/0 | ASTM D892 |
| Seq. II at 93,5 °C | ml/ml | 10/0 | ASTM D892 |
| Seq. III at 24 °C after 93,5 °C | ml/ml | 0/0 | ASTM D892 |
| Viscosity at 100 °C | mm²/s | 16,1 | DIN 51659-2 |
| Viscosity at 40 °C | mm²/s | 92,6 | DIN 51659-2 |
| Viscosity Index VI | 188 | DIN ISO 2909 | |
| Brookfield Viscosity at -40 °C | mPa*s | 33.800 | ASTM D2983 |
| Copper Strip Test at 121 °C | 1b | ASTM D130 | |
| Density at 20 °C | kg/m³ | 868,0 | EN ISO 12185 |
| Flashpoint | °C | 200 | DIN EN ISO 2592 |
| Pourpoint | °C | -57 | DIN ISO 3016 |
Related Gear Oils
See our wider Land Rover gear oil section for differential, gearbox and transfer box lubricants. Oils for compatible locking and limited-slip differentials are grouped in our ATB & Limited Slip Differential Oil section.
Additional information
| Weight | 1 kg |
|---|---|
| Dimensions | 25 × 10 × 10 cm |
Brand
Brand
Ravenol
Ravenol is our main lubricant brand for Land Rover servicing, covering engine oils, manual and automatic gearboxes, transfer boxes, differentials, ACE and power steering, brake fluid, coolant, grease and specialist workshop fluids.
We use Ravenol because the range lets us select the lubricant around the actual engine, gearbox, axle or hydraulic system rather than relying on viscosity alone. The result is a deliberately selected Land Rover range in which every product has a defined job, from TD5 engine oil and R380 MTF-94 to specialist ZF ATF, LT230 oil, limited-slip differential oil and later transfer-box fluids.
Why Twinwoods partners with Ravenol
Ravenol is a genuine German lubricant manufacturer, developing and producing its oils, fluids and greases in Germany. The range is backed by unusually detailed technical data, which matters to us because lubricant choice should be based on much more than the viscosity printed on the bottle.
We use Ravenol in our service kits, recommend it for the Land Rovers we specialise in and use it in vehicles we work on ourselves. More importantly, the range gives us properly specialised products for different engines, gearboxes, transfer boxes, axles and hydraulic systems rather than trying to make one generic lubricant cover everything.
Ravenol oils and fluids for Land Rover
| System | Ravenol products | What matters |
|---|---|---|
| Engine oil | VMO, RUP, Turbo-C HDC, TSi, FO, FLJ, VMP, SFE and Formel Extra | Engine, viscosity, specification, emissions equipment and how the vehicle is used |
| Manual gearboxes | MTF-2 / MTF-94 for the R380 and VSG 75W-90 for the Defender Puma MT82 | Gearbox type and complete lubricant specification rather than viscosity alone |
| Automatic gearboxes | ATF 5/4 HP and ATF Dexron III H | ATF 5/4 HP is our specialist choice for the Discovery 2 ZF 4HP gearbox, while Dexron III H covers compatible general ATF duties |
| Transfer boxes | MZG 80W-90 and VSG 75W-90 for the LT230, plus DTF-1 for compatible later active transfer boxes | Transfer box design and the fluid specification required by that particular unit |
| Axles and differentials | EPX 80W-90, VSG 75W-90, RHP 75W-90, LS 75W-90 and LS 80W-90 | Standard, ATB or limited-slip differential design together with the required viscosity and friction characteristics |
| ACE and power steering | SSF and ATF Dexron III H | Hydraulic system and the correct fluid specification |
| Brakes and clutch | DOT 4 LV and DOT 4 | DOT 4 LV is our main brake and clutch fluid, with conventional DOT 4 retained where appropriate |
| Cooling systems | C12+ OAT and C12evo Si-OAT coolant concentrates | Coolant technology, engine and the fluid already in the cooling system |
| Grease | MoS2 Multi-Purpose Grease, LI-86 Bearing & Propshaft Grease and HRG 2 Hot Red Grease | MoS2 for broad workshop and driveline use, LI-86 for bearings and universal joints, and HRG 2 for high-temperature grease duties |
| Workshop fluids | Professional Engine Cleaner and Winter Screenwash Concentrate | Purpose-specific maintenance products alongside the main lubricant range |
More than the correct number on the bottle
Two oils carrying the same viscosity grade can be very different products. Base oil, additive chemistry, volatility, viscosity stability, friction characteristics and manufacturer specifications all affect how a lubricant behaves once it is hot and working inside the component.
That is particularly important with Land Rovers. An R380 gearbox, LT230 transfer box, Rover differential, ZF automatic gearbox and electronically controlled later transfer box all place different demands on their lubricant. We select the Ravenol product around the component itself rather than simply finding the nearest familiar viscosity.
Identify the component
Start with the engine, gearbox, transfer box, differential or hydraulic system being serviced.
Match the specification
Check the complete ACEA, API, GL, manufacturer or transmission-fluid requirement rather than viscosity alone.
Consider vehicle use
Standard servicing, towing, off-road use and highly tuned engines can place very different demands on the lubricant.
Check existing fluid
Coolant, hydraulic fluids and specialist transmission oils should not be mixed simply because their colour or general description appears similar.
Ravenol engine oil
Our Ravenol engine-oil range runs from traditional oils for 200TDI, 300TDI and classic petrol engines through to specialist oils for TD5, Defender Puma TDCI and later Land Rover engines. Ravenol VMO 5W-40 remains our main TD5 recommendation, RUP 5W-40 covers very highly tuned TD5 engines, Turbo-C HDC 15W-40 is our preferred oil for standard 200TDI and 300TDI engines, while FO, FLJ, VMP and SFE cover the relevant later engine and emissions-system requirements.
Related Ravenol and oil sections
| Section | Use it for |
|---|---|
| Oils, Grease & Fluids | The complete Twinwoods lubricant, coolant and service-fluid range |
| Engine Oil | Engine oils selected around Land Rover engines, viscosity and specification |
| Gear Oil | R380, MT82, LT230, differential and specialist transfer-box oils |
| ATF & Steering Fluid | Automatic transmission and power-steering fluids |
| ACE Fluid | Discovery 2 Active Cornering Enhancement hydraulic fluid |
| Antifreeze & Coolant | OAT and Si-OAT coolant for different generations of Land Rover |
| Brake Fluid | DOT 4 and DOT 4 LV brake and clutch fluids |
| Land Rover Grease | Grease for propshafts, universal joints, bearings, high-temperature use and general workshop lubrication |
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Twinwoods 4x4 ships Land Rover parts across the UK and around the world. We regularly send parts overseas and use trusted tracked courier services so UK and international customers can order with confidence.
Standard UK shipments are normally sent with DPD. UK orders containing oils or fluids are normally sent with DHL where required, because some carriers restrict liquid shipments.
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Returns
14-day returns
Unopened & unused
Faulty? We cover postage
- Return within 14 days of delivery of your order.
- Items must be unused, unopened and in original packaging.
- Faulty items: we’ll cover return postage—keep your receipt.
- Refunds & Replacements are dealt with once the original item is received and inspected.
Non-returnable: non-stock/order in/special orders and genuine Land Rover parts (unless faulty).
Returns – quick FAQs
How long do I have to return an item?
14 days from receipt of your order.
Who pays return postage?
We cover it if the item is faulty—please keep your postage receipt.
What items are non-returnable?
Non-stock/special orders and genuine Land Rover parts (unless faulty).
How do I start a return?
Contact us
Please include your order number and a brief reason for the return.
Warranty
Buy with confidence: all new parts sold by Twinwoods 4x4 include at least 12 months manufacturer warranty against defects in materials and workmanship under normal use.
Some products and brands may include a longer warranty period where this is provided by the manufacturer. Where applicable, this will normally be stated on the individual product page or covered by the manufacturer’s own warranty terms.
Warranty cover applies to manufacturing defects. It does not cover misuse, incorrect fitting, competition use unless stated, contamination, modification, damage during installation, normal wear and tear, or failure caused by an unrelated vehicle fault. For certain components, proof of professional fitment may be required.
Warranty claims may require the part to be returned for inspection and/or supplier testing before the claim is accepted. Any advance replacement is discretionary.
Warranty remedies relate to the part itself, meaning repair or replacement, or refund if those are not possible. Warranty does not cover labour, removal or refitting, diagnostics, consumables, travel or other incidental costs.
This warranty is in addition to your legal rights and does not reduce those rights.
For full details, please see our Terms and Conditions.
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