ADVICE Car maintenance: How to prep for another circuit-breaker NEWS Spark Car Care launches Mobil servicing packages FEATURES Engine oil: Why does it eventually turn black? ADVICE Engine rattling: Why did it happen after my oil change? FEATURES Engine oil: Why does my car need it? ADVICE What’s the difference between mineral and synthetic engine oil? FEATURES How often should I rotate my tyres? ADVICE Should I do an engine flush during servicing?