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 GS400
Average mileage: (–)
Engine affected: 4.0L V8
4 people reported this problem
1 person shared problem details
1999 Lexus GS400- 4.0L V8Visitor
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