Why is my MG HS showing poor fuel economy suddenly?

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Why is my MG HS showing poor fuel economy suddenly?

Worn o r dirty spark plugs lead to incomplete combustion, which directly affects fuel efficiency. This is especially noticeable in Pakistani cities with stop-and-go traffic and poor fuel quality. Bad plugs mean the engine needs more fuel to produce the same power, increasing your fuel consumption.

Talha Kyanii asked on 02 Aug 2025 17:23:19 pm

1 Answer

59 views |

Gari Master - on 02 Aug 2025 17:38:41 pm

A sudden in fuel economy is often linked to inefficient combustion, which is typically caused by degraded o r dirty spark plugs. When spark plugs fail to produce a clean and strong spark, the air-fuel mixture does not burn completely. This incomplete combustion forces the engine to consume more fuel to compensate for the power loss.

In Pakistan, where traffic congestion and frequent short trips are common, the engine often doesnt reach optimal operating temperature. Combined with dusty air and impure fuel, this increases carbon fouling on spark plugs, worsening the issue.

Symptoms of poor fuel economy:

Decreased kilometers per liter

Black smoke from exhaust in some cases

Frequent need for refueling

Solution: Replace spark plugs if they haven’t been changed in 20,000–30,000 km. Use high-quality fuel and maintain other systems like the air filter and fuel injectors to support combustion efficiency.