Originally posted by AznMAC007
the 10w is thicker and the 5w is thinner...
Most shops use 10w30 during the colder weather and 5w30 during warmer seasons.
I dont know what shops you use, but thats completely backwards.
If you are going to change weights, go with a thinnner oil in the winter and thicker in the summer. Personally I run 0w-30 synthetic in the winter and 5w-30 synthetic in the summer.
I would NEVER run 10w oil in any of my cars in the winter. Check your owners manual and see for yourself what oil weights are recommended based on the year round temps in your area.
My aunt had 10w oil put in her civic by accident during her last oil change. With the cold temps in the NE, the valvetrain clatter when the engine was first turned over was unbelieveable. It sounded like the engine was starving for oil til it warmed up. I took the car back and had it changed to 5w right away and you could tell the oil was getting to where it needed to be much faster.
The newer Hondas recommend 5w-20 in order to boost their fleet mpg stats a tiny bit, but Im sticking with the xw-30.