Reasons for High Fuel Consumption in Classic Focus

[ColinFitz]

Long idling time, etc. Below are the reasons for high fuel consumption in Classic Focus: 1. Not turning off the engine during long idling: Compared to normal driving conditions, the engine ECU controls a higher fuel injection volume during idling or right after startup. If the engine is left idling for a long time without turning it off or frequently restarted, fuel consumption will inevitably increase. If parked for more than 1 minute, it is advisable to turn off the engine to wait, which is both fuel-efficient and environmentally friendly. 2. Excessive carbon buildup: Increased carbon buildup makes the intake pipe wall surface rough, affecting the intake efficiency and leading to higher fuel consumption. 3. Poor cylinder sealing: After prolonged use, the cylinder sealing of the car deteriorates. Poor sealing affects the working efficiency of the piston, reduces the conversion rate, and naturally increases fuel consumption.

[VanLeila]

I've been repairing classic Focus models for ten years, and high fuel consumption usually stems from multiple issues. The ignition system is the most critical: aging spark plugs or faulty ignition coils lead to incomplete combustion, wasting fuel; a clogged air filter restricts airflow, making the engine work harder and consume more fuel; brake drag is the most hidden issue—if brake pads remain pressed against the rotors, driving resistance increases significantly. Low tire pressure increases friction by 10%, directly raising fuel consumption; transmission issues like a failing torque converter lockup also waste energy. Regular maintenance advice: check spark plugs and air filters every 20,000 km, and measure tire pressure monthly to maintain recommended levels. These tasks aren't difficult—doing them yourself can save a lot of money. If left unchecked, severe engine carbon buildup will make repairs more costly and damaging to the car.

[Hunter]

I have been driving a classic Ford Focus for five years, and the main reason for the high fuel consumption was poor driving habits. In the early days, I loved sudden acceleration and braking, and my speed fluctuated frequently on highways—this constant speeding up and slowing down was the most fuel-intensive. Load also had a significant impact; a trunk full of tools or rooftop travel gear increased the car's weight, causing fuel consumption to soar. In summer, I often ran the air conditioning at maximum, which burdened the engine with the cooling system. Combined with the older car's design, stop-and-go traffic in the city led to low combustion efficiency. Later, I changed my strategy: smooth starts, anticipating traffic lights, and gently pressing the accelerator; reducing unnecessary luggage; setting the air conditioning to a moderate temperature and using open windows for ventilation instead. Car maintenance also became a priority, such as timely oil changes and brake disc inspections. Now, my fuel consumption has dropped from 13L to 10L, making driving both economical and relaxed.

[LaRylee]

I've driven a classic Focus for fifteen years, and the high fuel consumption is mainly due to aging components. The original engine's efficiency was inherently low, and over time, the spark plugs oxidized, weakening ignition and leading to poor combustion. After the oxygen sensor failed, the air-fuel mixture became too rich, burning excess gasoline. Loose and worn transmission belts caused significant power loss. There were also electrical issues, such as the ECU control becoming inaccurate as the battery degraded. These problems are often overlooked, but simple regular maintenance can alleviate them: inspect and replace sensors annually, and clean fuel tank carbon deposits. Although old cars are durable, neglecting careful maintenance naturally leads to higher fuel consumption. Taking early action can extend their lifespan.

[DelPeyton]

I'm concerned about automotive environmental protection. The classic Focus has high fuel consumption, wasting resources and increasing emissions. The reasons are not just mechanical: a dirty air filter that isn't replaced reduces intake efficiency, causing the engine to burn more gasoline; bad driving habits like opening windows at high speeds increase wind resistance and fuel consumption. Long-term overloading or excessive AC use are also major factors, with AC use increasing fuel consumption by 10%-15%. Suggested optimizations: adopt eco-driving techniques for smoother speeds; use recirculated AC to reduce cooling load; maintain proper tire pressure for fuel savings. Maintenance is equally crucial—cleaning or replacing filters is economical and hassle-free, lowering fuel consumption reduces carbon footprint and benefits your wallet too.