A new oil by Shell aims to solve this issue by offering a 5W-30 full-synthetic heavy-duty oil ... “Then we had to introduce non-phosphorous chemicals to boost the oil to give the diesel side ...

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 ...

Automakers usually specify a 5W-20 or 5W-30 oil for colder temperatures, with a 10W-30 oil as optional for higher ambient temperatures. These three ratings cover most light-duty vehicles on the road.