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Castrol Syntrax Longlife 75W-90 Fully Synthetic Car Gearbox Oil - Formerly SAF-XO

Castrol Syntrax Longlife 75W-90 Fully Synthetic Car Gearbox Oil - Formerly SAF-XO

Castrol Syntrax Longlife 75w90 - 1 Litre

1 Litre


Castrol Syntrax Longlife 75w90 - 20 Litres

20 Litres


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  • Description
  • Benefits
  • Specifications
  • Technical Info
  • Shipping Explained

Castrol Syntrax Longlife 75W-90 Fully Synthetic Car Gearbox Oil - Formerly SAF-XO

General Details:

OilSynthetic Oil
Oil Viscosity Classification SAE75W-90
SpecificationAPI Other GL-5
Manufacturer ApprovalMAN 342 Typ S1
Manufacturer ApprovalScania STO 1:0
Manufacturer ApprovalZF TE-ML 05A
Manufacturer ApprovalZF TE-ML 12B
Manufacturer ApprovalZF TE-ML 17B
Manufacturer ApprovalZF TE-ML 19C
Manufacturer ApprovalZF TE-ML 21A
for components see parts list
Castrol Syntrax Longlife 75W-90 (Formerly SAF-XO 75w-90) is a fully synthetic multigrade final drive lubricant with excellent low temperature performance, load carrying ability and resistance to foaming at high temperatures and sustained high speeds. It also provides exceptional high temperature stability and oxidation resistance.

Castrol Syntrax Longlife 75W-90 (Formerly SAF-XO 75w-90) is Castrol's prime recommendation for a full synthetic lubricant for final drives in heavy commercial

PDF Downloads:

Download the Technical PDFDownload the Safety PDF


Castrol Syntrax Longlife 75W-90 (Formerly SAF-XO 75w-90) is specially designed and fully approved by BMW for use in all BMW final drives fitted with conventional (non limited slip) differentials. Castrol Syntrax Limited Slip 75w-140 should be used for BMW final drives fitted with limited slip differentials.

It is also fully approved to MAN 342 SL+ for back axles.

Castrol Syntrax Longlife 75W-90 (Formerly SAF-XO 75w-90) replaces Castrol G728 and is suitable for other applications where a high performance API GL5 lubricant is specified.


  • Specifications
    • API GL5
    • MAN 342 S1
    • Scania STO: 1
    • AF TE-ML 05A, 12B, 17B, 19C, 21A
    • BMW 33 01 96 (149)

Technical Information:

  • SAE Viscosity Rating 75W/90
  • Relative Density @ 20º C 0.855
  • Viscosity @ 40º C cSt 103.7
  • Viscosity @ 100º C cSt 15.7
  • Viscosity Index 162
  • Flash Point (COC) ºC 220
  • Pour Point ºC -51


SHIPPING IS FREE* for orders of £60 and over , regardless of the weight of your order.
We've tried to keep all other shipping costs as low as we can.

Carriage starts at just £0.95 (inc VAT) for small items, with our most common courier rate set at £4.99 for orders of 5kg (enough for 5 litres of oil).

  • *Free shipping is available for UK Royal Mail, UPS Access Point™ (click & collect) and standard UK courier services (not express / priority / islands).
  • Courier surcharges mean we are unable to offer free "to the door" courier shipping from us in Cornwall up to Highlands / Grampian in Scotland - and because we send a lot of liquids, not every courier option is available to us. UPS Access Point™ (click & collect) is available as a free shipping option across Scotland, Wales and England, wherever there is a UPS Access Point™ Location.
  • Carriage charges are based on weight - please see our table of carriage costs for full details (although adding an item to your cart and viewing the calculated carriage is often easier!).
  • Priority shipping is also available.

How long will it take to get my order?

We give an estimate of delivery dates as you shop and in your basket. The vast majority of items are held in stock and dispatched from our UK warehouse and we'll do all we can to get your order to you as quickly as possible.

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We say...

"Good quality synthetic 75w-90 approved for BMW open diffs and other applications."

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