Can you use it for What?
5w30
The 1993 Oldsmobile Ciera with the 3300 V6 (code 'N') is specified for 10W30. 5W30 can be used is severe service/winter conditions. The service fill capacity for the Ciera is 4.5-quarts with the filter.
Probably. Generally it's either 5w30 or 10w30. If they have the same engine, even more likely.
You can, but I would not recommended. Due to it's not a new truck and high mileage. You can put 10W30 or 10W40 instead. I think the 5W30 may hurt your engine.
SAE 5w30 weight unless the engine is very high mileage which in that case use SAE 10w30.
SAE 5w30 any major brand. Use High Mileage oil if you have over 100,000 miles on the odometer.
NO, stick with 5w20 or 5w30 if the mileage is over 100,000.
Any SAE approved 5w30 motor oil will work just fine in your Towncar. If you have a lot of miles on it you may want to consider one of the new high mileage blends.
5w30
SAE 5w30 any major brand of High Mileage oil.
No, not if the recommended weight is 5w30. Only use the weight recommended by the manufacture.
It requires 4.5 quarts of SAE 5W30 oil with filter change.