Oil-Oil Selector Tool
Select your brand, model, and engine — we'll tell you the exact oil specification, capacity, and best products for your car. Free, instant, and OEM-verified.
Try the Oil SelectorGuides & Reviews
Long-Life Engine Oils: Smart Investment or Marketing Hype?
Are long-life engine oils worth the premium? We cut through the marketing to explain when they make sense and when you're wasting money.
Read more → reviewsLiqui Moly Engine Flush Review
Honest review of Liqui Moly Pro-Line Engine Flush. Is it safe for modern engines? What do mechanics actually think? We investigate.
Read more → reviewsWynn's DPF Cleaner Review
Honest review of Wynn's DPF Cleaner. Does the cerium catalyst actually unblock your DPF, or is it £10 down the drain? Real results inside.
Read more → reviewsRedex DPF Cleaner Review
Honest review of Redex DPF Cleaner for diesel cars. We look at what it does, what it doesn't, and whether it's worth your money.
Read more →Why the Right Engine Oil Matters
Protect Your DPF
Wrong oil produces metallic ash that permanently clogs diesel particulate filters. A £1,500 repair that correct low-SAPS oil prevents entirely.
Turbo Bearing Life
Turbochargers spin at 200,000+ RPM on bearings lubricated solely by engine oil. Wrong viscosity or degraded oil means turbo failure — £1,200+ to replace.
Save Money
Correct oil costs the same as wrong oil. The difference is whether you spend £40/year on oil changes or £2,000 on the repair that wrong oil causes.
Keep Your Warranty
Using non-approved oil can void your manufacturer warranty. Every oil we recommend holds the exact OEM approval your engine requires.
Frequently Asked Questions
How do I find the right oil for my car?
Use our Oil Selector tool — select your brand, model, and engine, and we'll show you the exact specification, viscosity, and capacity your engine needs. Alternatively, check your owner's manual or the oil filler cap.
What do the numbers on engine oil mean (e.g., 5W-30)?
The first number (5W) indicates cold-start flow — lower is better in winter. The second number (30) indicates hot-operating thickness. Your manufacturer specifies the exact grade your engine bearings and oil pump are designed for. Using a different grade changes film strength and flow rate.
Can I use any 5W-30 oil in my car?
No. Viscosity grade is only one part of the specification. You also need the correct ACEA class (C2, C3, C5, etc.) and OEM approval (VW 504 00, BMW LL-04, etc.). A 5W-30 ACEA C3 and a 5W-30 ACEA C2 have different SAPS levels that affect DPF health and bearing protection.
How often should I change my engine oil?
Follow your manufacturer's fixed service interval — typically 10,000-12,000 miles or 12 months for European cars, 7,500-10,000 miles for American vehicles. Variable/LongLife intervals (up to 18,000+ miles) are designed for ideal conditions that real-world driving rarely provides. When in doubt, annual changes are the safest approach.
Is synthetic oil really necessary?
For any turbocharged engine, any engine with a DPF, any engine requiring 0W-20 viscosity, or any engine on extended drain intervals — yes. Turbo bearings see temperatures that mineral oil cannot survive. Read our full guide on synthetic vs mineral oil.
Are your oil recommendations reliable?
Every specification is individually verified against manufacturer documentation and cross-referenced with at least two independent sources. We only recommend oils that hold the actual OEM approval — not "suitable for" marketing claims. Read about our methodology.