Sludge can build up in the engine because Lexus did not recommend frequent enough oil changes. Lexus will sometimes offer a discount on cleaning the engine if necessary. Owners who changed their oil every 3,000 miles did not experience these problems. This sludge build up can lead to excessive oil consumption.
Excess Engine Oil Consumption on Lexus GS300
Average mileage: 150,000 (150,000–150,000)
Engine affected: 3.0L V6
8 people reported this problem
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Excessive oil consumption requiring me to add about a quart of oil every 2 -4 weeks
3,000 - 4,000 miles After an oil change, the low engine oil light turns on. Now it's as if I have a leak. Need to take the car in for inspection.