However, precise location can vary slightly depending on the year and any modifications to the engine bay. To be absolutely certain, I recommend:
* Checking your owner's manual: This is the best source of information specific to your vehicle's year and model.
* Using an online parts diagram: Many auto parts websites (like AutoZone, Advance Auto Parts, etc.) allow you to select your car's year, make, and model to view a diagram showing the location of all components, including the power steering reservoir.
* Searching for images online: Searching for "[Your Oldsmobile 88 LSS Year] Engine Bay" on Google Images might show pictures of the engine compartment that reveal the reservoir's location.
Looking at images online is probably the quickest method after checking your owner's manual, but keep in mind slight variations could exist.