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Shell 550027945 Spirax S4 AT 75W-90, Gear/Transmission Oils - 20 Litre

Product Number: PRD00004055

£216.36 £212.12

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Variations

209L

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Shell Spirax S4 AT 75W-90 (formerly Shell Spirax X 75W-90) is a part-synthetic automotive gear lubricant specifically designed for use in gearboxes and axles. The product is positioned for passenger car, light commercial vehicle and 4x4 service where a synthetic-blend SAE 75W-90 multigrade gear oil meeting both API GL-4 and GL-5 specifications is required.

The SAE 75W-90 part-synthetic multigrade gear oil viscosity gives improved cold-start performance and reduced gear-train friction compared to mineral SAE 80W-90 grades.

Approvals and performance levels are positioned within the API GL-4 and GL-5 dual-purpose gear oil class — verify the specific OEM-approval set against the current product label.

Shell Spirax S4 AT 75W-90 is also available in a 209-litre drum (PRD00004057) for workshop bulk supply.

The 20-litre pack format is suited to single-machine top-up and small workshop service. Store sealed in the original packaging, in a clean, dry area away from extremes of temperature, to preserve product performance over its shelf life.

Shell Spirax S4 AT 75W-90 is a part-synthetic superior quality automotive gear lubricant specially designed for use in gearboxes and axles.

Specifications, Approvals & Recommendations:

API Service Classification : GL-4, GL-5, MT-1

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PartsForMachines is a premier e-commerce platform, founded in 2019 in Warwickshire, UK, specializing in aftermarket parts and services for construction, agriculture, and industrial machinery. We offer an extensive catalog of over 500,000 products. Standard delivery: 1–3 working days within UK mainland. We are proud to be an authorised distributor, giving customers extra confidence when purchasing genuine products from us. In addition, we provide a 30-day return policy for eligible items.

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Kinematic Viscosity@40°C	92.6 mm²/s
Kinematic Viscosity@100°C	15.4 mm²/s
Viscosity Index	177
Density@15°C	875 kg/m³
Flash Point (COC)	170°C
Pour Point	-42°C

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Engine Parts	Product Number	Product Name	Recommended Units	Product Price

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shell-spirax-s4-at-75w-90-20-litre.pdf	Open Now

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Standard Delivery: UK Mainland Free
Delivery Estimate: 3 to 5 working days
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Technical Specification
PRODUCT NUMBER	PRD00004056	PRD00004049	PRD00004629	PRD00004033	PRD00003003	PRD00003005	PRD00003009	PRD00003234	PRD00003014	PRD00003004	PRD00002308	PRD00002264	PRD00002249	PRD00004642	PRD00004026
Density, 15°C	0.869	0.908	0.899	0.847	0.892	0.009	0.909	0.085	0.868	0.892	0.8665	0.896	0.859	0.9	0.884
Flash Point (COC)	210	215	205	180	178	182	178	210		178	202	222	216	175	200
Kinematic Viscosity @40°C	172.4	358	93.9	37	145.4	172.5	431	34.8	92.8	145.4	104	134.9	35	146	36
Pour Point	-42	-15	-30	-48	-24	-27	-15	-52	-45	-24	-51	-33	-45	-27	-36
SAE	75W-140	85W-140			80W-90		85W-140		75W-90	80W-90	75w-90	80w-90		80W-90	10W
Volume	20	20	20	20	20	20	20	20	20	208	20	20	20	20	209
Viscosity Index	174	94		180	99	106	96	185	156	99	154	101	175	100
Oil Type	Synthetic Technology base fluid			Synthetic Technology base fluid							Fully Synthetic	Mineral	Part Synthetic	Mineral
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Technical

Q 1. What transmissions and axles is Shell Spirax S4 AT 75W-90 designed for?

A. Shell Spirax S4 AT 75W-90 is for passenger car, light commercial vehicle and 4x4 service in gearboxes and axles where a synthetic-blend SAE 75W-90 multigrade gear oil is required.

Q 2. Is Shell Spirax S4 AT 75W-90 the same as Shell Spirax X?

A. Yes, Shell Spirax S4 AT 75W-90 was previously named Shell Spirax X 75W-90.

Q 3. Is Shell Spirax S4 AT 75W-90 synthetic?

A. Shell Spirax S4 AT 75W-90 is a part-synthetic (synthetic-blend) gear lubricant — combining synthetic and mineral base oils.

Q 4. What is an API/ACEA classification?

A. API and ACEA are the universal lubricant performance standards every reputable oil meets. They are your baseline check — match the code your handbook specifies (e.g., API CI-4 or ACEA E7 for heavy-duty diesel) and the oil is technically suitable for your machine. Every oil on our site lists its API and ACEA classifications.

Q 5. What performance classifications does Shell Spirax S4 AT 75W-90 meet?

A. Shell Spirax S4 AT 75W-90 is positioned within the API GL-4 and GL-5 dual-purpose gear oil class. Verify the specific OEM-approval set against the current product label.

Q 6. What is the difference between Shell Spirax S2 G 80W-90 and S4 AT 75W-90?

A. Both are Shell Spirax automotive gear oils. S2 G 80W-90 is the mineral API GL-4 range for manual transmissions and gear sets. S4 AT 75W-90 (this product) is the part-synthetic API GL-4/GL-5 dual-purpose range with lighter cold-side viscosity for improved cold-start and fuel-efficiency.

Q 7. What is an OEM Specification?

A. An OEM Specification is the lubricant requirement set by a vehicle or equipment manufacturer (e.g., MB 228.3, VW 504.00). When an oil lists the code, the oil manufacturer has developed and tested it to meet the criteria the equipment manufacturer requires. Match the code in your handbook and you have a lubricant engineered for your machine.

Q 8. What is an OEM Approval?

A. An OEM Approval means the oil has been formally tested and signed off by the equipment manufacturer and listed on their official approved-products register (e.g., MB-Approval 228.3). An Approval confirms the oil is recognised by the equipment manufacturer for service use in their machines.