Fuel is the single largest expense for matatu businesses. Keeping a HiAce efficient requires proper tyre pressure, smooth acceleration, and scheduled servicing. Avoid unnecessary idling, as it burns fuel without generating revenue. Drivers should maintain steady speeds rather than aggressive stop-and-go driving common in city routes. High-quality fuel from reliable stations prevents injector clogging and maintains power output. Simple upgrades like clean air filters and proper wheel alignment also improve mileage. With fuel prices constantly fluctuating, efficiency determines profitability—and disciplined driving makes all the difference.