Pakistan's roads are demanding on engines. Summer temperatures routinely exceed 45°C, while dusty conditions accelerate oil contamination. Choosing the wrong oil grade can lead to accelerated engine wear, poor fuel economy, and overheating.
Engine oil viscosity is described by two numbers separated by a 'W' for Winter. A 5W-30 oil flows like a thin 5-weight oil in cold starts and thickens to a 30-weight when hot. For Pakistani summers, the second number matters most — the higher it is, the better it protects at high temperatures.
For small-displacement engines (660cc–1000cc), 10W-40 mineral oil generally works well since these engines run hot and a slightly thicker grade helps maintain oil pressure. If budget allows, a 5W-40 semi-synthetic gives better protection in summer.
Most mid-size Japanese-spec engines call for 5W-30 or 5W-40. Semi-synthetic or fully synthetic oil is worth the premium if you want to extend drain intervals to 10,000 km.
Diesel engines typically need 15W-40 mineral oil, or 10W-40 semi-synthetic in summer — always verify with your owner's manual, as diesel oil specifications differ from petrol.
As a general interval guide: mineral oil every 5,000 km or 3 months, semi-synthetic every 7,500 km or 4 months, and fully synthetic every 10,000 km or 6 months. Given dusty local conditions, we recommend erring on the shorter side of these intervals.