Motor mounts

Buick Ownership
2007 Lucerne CXL. and 1995 Lesabre currently, past 1973 Riviera, 1968 Riviera
Both V8 an V6 mounts are known to have to be replaced as it's a oil filled mount to isolate engine vibration from the rest of the car. Milage in the 50 to 60k range have had them needed to be replaced so it's something that each car can be different. You may want to also check out the Cadillac DTS forum as it's primarily the same car with the same mount design.
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