Car Engine Oil — 5W-30, 5W-40, 10W-40 & More
Compare SAE viscosity grades for diesel and petrol engines from top brands. Find the right motor oil for your vehicle with live pricing and availability.
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Engine Oil buying guide — what to know before you buy
Engine oil lubricates, cools, and protects internal engine components from wear. Using the correct viscosity and specification is critical — the wrong oil can cause premature wear, DPF clogging, or warranty issues. At CarParts247 we stock engine oils from Castrol, Mobil, Shell, and Total.
Choosing the right engine oil
Every engine has a manufacturer-specified oil grade (e.g., 5W-30) and approval (e.g., VW 504.00, MB 229.51). Using the correct specification ensures proper lubrication and emission system compatibility.
- Check your owner's manual for the exact viscosity grade and OEM approval
- Modern engines often require low-SAPS oil to protect the DPF or catalytic converter
- Fully synthetic oils provide the best protection for turbocharged and direct-injection engines
- Do not mix different oil types unless the manufacturer explicitly permits it
- Always change the oil filter at the same time as the oil
Oil change intervals and best practice
Service intervals depend on driving conditions. Short trips and city driving contaminate oil faster than motorway cruising. Many vehicles now have variable service indicators that measure oil condition.
- Typical interval: 10,000–15,000 miles or 12 months, whichever comes first
- Severe-use conditions (short trips, towing, dusty environments) shorten the interval
- Check oil level monthly — consumption of up to 0.5 L per 1,000 miles can be normal on some engines
- Run the engine warm before draining to remove more contaminants
- Dispose of used oil at a recycling centre — never pour it down the drain
Frequently Asked Questions
What happens if I use the wrong oil?
Using incorrect viscosity can cause increased wear, poor cold-start lubrication, or oil consumption. Using non-low-SAPS oil in a DPF-equipped engine can block the filter, triggering expensive repairs.
How often should I change engine oil?
Follow the manufacturer interval — typically 10,000–15,000 miles or annually. If you mostly drive short urban trips, consider changing earlier as the oil degrades faster.
Is synthetic oil worth the extra cost?
Yes, especially for modern engines. Synthetic oil flows better at low temperatures, resists breakdown at high temperatures, and generally lasts longer between changes.
Can I switch from mineral to synthetic oil?
Yes, on most modern engines you can switch to synthetic without issue. Some very high-mileage engines with worn seals may show increased consumption — monitor the level after switching.
