my 1995 Civic has 210K miles. The original recommendation in manual is 5W-30 or 10W-30. I am in northern CA which never gets below 40 degrees. Should I go with 10W-30 or move up to 10W-40 due to engine age?
If the engine is not burning oil or having any noises, I would stick to 5w-30 or 5w-40. 10w-30 is fine for the summer months but pointless otherwise. SuperTech has a 5w-40 semi-synthetic which is cheap.
For very cold ambient temps possibly.. The problem is, the other video I posted shows the loud clatter at startup. It was significantly louder at startup on a warmer day too. Thinner oil at startup for a warm engine with tolerances now worn, has less of a cushion with a thinner weight. This vehicle is in a very warm climate, especially coming up. A lot of variables to take into account.
