the only motor oil you have available is 5W-30, and you must drive it, it's better to add the 5W-30 than it is to drive your car with extremely low engine oil. However, I would advise against ...

Yes, you can mix conventional and synthetic oil — doing so will not harm your engine, but it may remove ... An oil type, like 5W-30, should be embossed on the cap's surface.

Synthetic oil used to be something only performance cars needed, but not anymore. Now it’s the manufacturer-recommended engine lubricant ... on a quart of oil—5W-30, 0W-20, etc.— ...

“Conventional means the engine oil uses only standard mineral-type base ... heavy-duty engine oil grades such as 10W-30, 5W-40, 5W-30 and 0W-40; hold potential for higher temperature performance ...