Lubricants and Additives

Lubricants and Additives – Engine and Drivetrain Fluids in One Place

Oil film: this overview category groups the oils used for vehicle lubrication together with the additive-related decision points behind them. The right fluid can help separate loaded surfaces, support temperature management, carry contamination towards service intervals and keep related components behaving more consistently in use.

Technical background and system integration

System role: engine oil and gear oil serve different mechanical environments, so they should not be treated as interchangeable. Engine oil works around combustion heat, contamination control and moving valvetrain and bearing surfaces, while gear oil is chosen around loaded gear meshes, bearings and differential behaviour.

Additive package: beyond the base oil, the chemistry influences viscosity stability, anti-wear behaviour, foaming control and oxidation resistance, which is why one product may suit regular road use better while another may make more sense for repeated high-load operation.

• Engine oil: use this route when you are matching the engine’s lubrication needs, start-up behaviour and operating-temperature characteristics to the manufacturer guidance and your real-world use.
• Gear oil: choose within this group when the target component is a manual gearbox, differential or another drivetrain unit where tooth loading and friction behaviour matter more than the label alone.
• LSD: with a limited-slip differential, the product card should be checked carefully because locking behaviour and friction characteristics can react poorly to the wrong specification.

How to choose the right one

Quick selection guide: if you want to narrow the engine side first, the Engine Oils subcategory is the clean decision path; from there, use the product card to confirm viscosity grade, intended use and pack size before ordering.

• Application: separate daily road use, mixed road-and-track driving and heavier motorsport use, because load profile and service interval planning shape the right choice together.
• Viscosity: start with the manufacturer’s recommended range, then consider whether ambient conditions, start-up temperatures or sustained heat load justify a different option within that guidance.
• Use case: a short-trip road car may need a different compromise from a track-biased build or a performance car that spends long periods fully warmed through.
• Pack size: compare not just price, but how much fluid the service actually requires, so you are less likely to leave opened containers sitting for uncertain storage periods.

Installation and failure-prevention tips

Clean filling: before topping up or changing oil, keep the filler area, funnel, container and nearby surfaces clean so contamination does not enter the system. If your focus is on the drivetrain side, the Gear oils subcategory is where to confirm whether the application is for a manual gearbox, an open differential or an LSD unit.

Common mistake: the issue is often not the oil itself but the application mismatch: gear oil in the wrong place, an LSD unit filled with an unsuitable specification, or a viscosity choice that does not line up with the vehicle guidance; symptoms can include noisier operation, notchier shifting or changed oil consumption patterns, and these are best prevented by comparing the handbook with the product card before filling.

PRO TIP: if the car alternates between road mileage and track work, assess the intended drain interval, operating heat load and start-up conditions together rather than choosing on branding alone, because that combination usually defines the better compromise.

FAQ

What is the difference between engine oil and gear oil?
They are designed for different operating environments. Engine oil works around engine lubrication and heat load, while gear oil is selected for the gearbox or differential where loaded gears and specific friction behaviour are part of the job.

Which option suits road use and which suits track use?
Begin with the vehicle manufacturer recommendation, then compare it with how the car is actually used. A mixed road-and-track build often needs a different compromise from a daily driver or a project that mostly runs fully warmed up.

What is the most common failure or installation mistake?
Start by checking the product card against the handbook, then confirm viscosity grade, application and whether the unit requires a special specification. After that, verify fill quantity, inspect the condition of the old oil, look around the drain plug and sealing area, and confirm LSD compatibility where relevant.

Can I mix different brands or specifications?
Top-ups can sometimes make that unavoidable, but for planned maintenance it is usually better to stay within one clear product logic. If there is doubt, a full change back to the correct specification is often the more predictable route.

When should I choose an LSD-compatible gear oil?
Choose it when the car runs a limited-slip differential and the unit documentation or builder guidance calls for it. An open differential or a different drivetrain layout may require a different approach, so the component documentation should lead the decision.