* The year of your Buick Riviera: This will narrow down the possible engine and supercharger types.
* The specific engine: Knowing the engine displacement (e.g., 3.8L, 4.5L, etc.) is crucial.
* The type of supercharger (if equipped): Was it a Roots-type, Eaton M90, Eaton M112, or something else? This is often specified in your owner's manual or on a sticker under the hood.
Once you have this information, you can:
* Consult your owner's manual: This is the best source for the recommended supercharger oil type and specifications.
* Check online resources: Websites like the Buick owner's forum, or parts websites that specialize in Buick parts (like RockAuto) can provide information based on your year and model.
* Contact a Buick specialist mechanic or dealership: They can definitively tell you the correct oil.
Do not attempt to guess the correct supercharger oil. Using the wrong oil can severely damage your supercharger.
