Why do some Toyota Camry models in Pakistan experience excessive engine oil consumption?

Causes of High Oil Consumption:

Piston Ring Wear: In older Toyota Camry models particularly from 2007-2011, excessive oil consumption is often due to worn piston rings. As these rings wear down, they fail to properly seal the combustion chamber, allowing oil to leak into the cylinders, where it is burned along with fuel. This causes the engine to consume more oil.

Valve Seal Issues: Valve seals can deteriorate over time, especially in vehicles with high mileage, allowing oil to seep into the combustion chamber, causing oil burning and subsequent oil consumption.

Engine Sludge Buildup: In Pakistan’s hot climate, engine oil degrades more quickly, leading to sludge buildup. Sludge can clog the oil passages, reducing oil flow and contributing to increased oil consumption.

Effect of Pakistan’s Fuel Quality:

Low-Quality Fuel: Many fuel stations in Pakistan sell fuel with higher levels of impurities. Low-grade petrol can contribute to carbon buildup in the engine, including around the piston rings and valve seals, exacerbating oil consumption problems.

Best Oil Brands and Viscosity:

Oil Brand: Recommended synthetic oils for the Toyota Camry in Pakistan include brands like Castrol EDGE, Mobil 1, o r Shell Helix Ultra. These high-quality synthetic oils offer better protection against degradation in extreme heat.

Viscosity: The recommended oil viscosity for most Camry models is 5W-30 o r 10W-30, depending on the model year and local climate. In hotter areas like Karachi o r southern Punjab, a slightly thicker oil such as 10W-40 can be beneficial.