Do Electric
Cars Use Oil?
No engine oil. Pure EVs have no engine to lubricate. There is a small amount of gear oil in the reduction gear which gets changed once around 60,000 miles. No oil filter. No regular oil top-ups. Here is the plain English explanation for UK drivers.
No engine oil. Pure electric vehicles do not have engines so they have no engine oil. EVs do use a small amount of specialist gear oil in the reduction gear which connects the motor to the wheels. This gear oil is typically changed once around 60,000 miles or never (some manufacturers specify it as 'lifetime' lubricant). No oil filter, no oil top-ups between services and no oil dipstick. Compared to petrol cars that need 5 to 7 litres of engine oil changed annually, EVs are remarkably oil-free.
EV Engine Oil Use
Pure EVs have no engine and use no engine oil at all. Zero litres needed for the life of the vehicle.
Reduction Gear Oil
EVs do use 1 to 2 litres of specialist gear oil in the reduction gear. Changed once around 60,000 miles or never.
Typical Change Interval
Most EV manufacturers specify reduction gear oil change at around 60,000 to 100,000 miles. Some specify it as lifetime fluid.
Service Cost
When the reduction gear oil change is needed, typical UK cost is £200 to £300 including labour and proper lubricant.
What this page covers
What fluids a UK electric car actually uses
The 'do EVs use oil' question deserves a clear answer because the difference between EV and petrol cars on this point is dramatic. Pure EVs have no engine to lubricate so they do not use engine oil at all. The 5 to 7 litres of engine oil that a petrol car burns through and changes annually simply does not exist in an EV's service schedule.
What EVs do have
EVs use a small amount of specialist gear oil in the reduction gear that connects the motor to the wheels. This is typically 1 to 2 litres of synthetic gear oil sealed in the gearbox housing. Most UK EV manufacturers specify a change interval of around 60,000 to 100,000 miles. Some specify the gear oil as 'lifetime' lubricant that does not need changing during normal vehicle ownership.
The motor itself often uses a different liquid for cooling and sometimes electrical insulation. Tesla and several others use oil-based motor cooling where the oil bath both lubricates the motor bearings and removes heat. This oil is typically changed at the same time as the reduction gear oil if it is changed at all.
Other EV fluids
EVs do still use several other fluids that need attention. Brake fluid (changed every 2 years like any car). Battery and motor coolant (changed every 80,000 to 120,000 miles depending on manufacturer). Cabin air conditioning refrigerant. Windscreen washer fluid (regular top-up). Tyre rotation does not require any fluid but it is the most frequent ongoing service item.
Compared to petrol cars, EVs eliminate engine oil, oil filter, fuel filter, transmission fluid (single-speed gear is sealed), differential oil (combined into the reduction gear), exhaust system maintenance and timing belt or chain. The fluid maintenance burden is genuinely much lower.
Service implications
The lack of engine oil means UK EV owners save around £150 to £250 per year vs petrol equivalents on routine servicing. No annual oil and filter change. No diesel particulate filter regeneration. No catalytic converter replacement at high mileage. The savings compound over typical 8 to 10 year ownership.
EV vs petrol fluid usage compared
EV fluid maintenance over typical ownership
Annual service
Top up windscreen washer fluid. Check brake fluid level. No oil change. Total fluid work around 5 minutes.
Year 2 / 24,000 mi
Brake fluid replacement. Same procedure as any car. Around £40 to £80 inclusive of labour.
Year 5 / 60,000 mi
Reduction gear oil change (where specified). Around £200 to £300 including specialist gear oil.
Year 7-8 / 80,000-120,000 mi
Battery and motor coolant change. Around £400 to £600 depending on system complexity.
Key fluid facts UK EV owners should know
No engine oil ever
Pure EVs use no engine oil. The £150 to £250 annual saving on oil changes alone is meaningful over typical 8 to 10 year ownership.
Gear oil changed rarely
Reduction gear oil is changed once around 60,000 miles or never depending on manufacturer. Much less frequent than petrol gearbox oil.
Brake fluid still matters
Brake fluid absorbs moisture from the air and must be changed every 2 years on EVs just like any other car.
Coolant volume similar
EVs use coolant for the battery and motor. Volume is similar to petrol coolant systems around 6 to 10 litres total.
Petrol car fluids
- Engine oil: 5-7L annually
- Oil filter: replaced annually
- Gearbox oil: 4-6L (less often)
- Brake fluid: every 2 years
- Engine coolant: 6-10L
- Power steering fluid (some)
EV fluids
- Engine oil: zero ever
- No oil filter
- Reduction gear oil: 1-2L (60,000 mi or lifetime)
- Brake fluid: every 2 years
- Battery and motor coolant: 6-10L
- Electric power steering (no fluid)
Fluid maintenance is one of the EV servicing differences from petrol. The wider EV Charger Guidance hub covers home charger install, running cost, the buying decision and the practical questions UK drivers ask about everyday EV ownership.
If you want the broader servicing picture, our guide on do electric cars need servicing covers the full schedule. The engine question is in do electric cars have engines. For running cost see are electric cars cheaper to run.
Common questions
Why don't EVs need engine oil?
Is there really nothing to top up between services?
Can I check the gear oil myself?
Do EVs use any oil for the brakes?
Will my old engine oil be missed?
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