Free oil change reminder timer. Set a 3-month or 6-month countdown for your next service. Conventional oil: 3,000–5,000 miles. Synthetic: 7,500–10,000 miles.
Conventional oil: every 3,000–5,000 miles or 3 months. Full synthetic oil: every 7,500–10,000 miles or 6–12 months. Semi-synthetic: every 5,000–7,500 miles. Always follow your vehicle manufacturer's recommendation in the owner's manual — modern engines with synthetic oil often specify 10,000–15,000 mile intervals.
Oil degrades with heat, oxidation, and contamination over time. Old oil loses viscosity, accumulates sludge, and provides progressively worse lubrication. Extended oil change intervals cause: increased engine wear, sludge buildup in oil galleries, overheating, and in extreme cases, catastrophic engine failure.
Park on level ground, wait 5 minutes after turning off the engine. Remove the dipstick, wipe clean, reinsert fully, remove again. Oil level should be between the minimum and maximum marks. Dark brown-black colour is normal. Milky appearance (oil mixed with coolant) requires immediate professional inspection.
Conventional oil is refined from crude oil with natural molecular variation. Synthetic oil is engineered with uniform molecules for superior performance at temperature extremes, better oxidation resistance, longer service life, and improved fuel economy. The cost difference is typically offset by less frequent changes.
Yes — full synthetic oil can extend intervals to 7,500–15,000 miles depending on driving conditions. However, frequent short trips, towing, dusty environments, or track driving require shorter intervals regardless of oil type. An oil analysis test (£15–30) can scientifically determine when your specific oil needs changing.