What is the best engine oil to put in my 2006 Honda Accord Ex 4 cylnider?
It’s a Honda so don’t put any oil in it at all. Just kidding. Use the manufacturer’s recommended weight (which is probably 5W-30) but next time use synthetic oil. You will free up a couple of horses and you won’t have to change the oil as often as with standard oil. Synthetic motor oil can now go up to 15,000 miles!