Sludge Buildup on Engine Due to Infrequent Oil Changes on Lexus GS400

Problem overview

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.

8 people reported this problem

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Lexus GS400 vehicles with this problem

3 model years affected

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Submitted by Jim Taddei · May 29, 2025

Published by RepairPal

Sludge Buildup on Engine Due to Infrequent Oil Changes on Lexus GS400

Problem overview

Lexus GS400 vehicles with this problem

Need a diagnosis? Trust our Lexus experts.

Search for another problem

Ask our experts about your Lexus.