Quote:
Originally Posted by Triker
Now I’m curious, my owners manual calls for 10-w-30 at temp range of 10-70 degrees F and 10-w-40 for temp range of 10-110 degrees F. I am getting ready to change mine very soon and would like to know what is everyone’s choice of oil and weight?
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The number before the W describes the oil's viscosity at low temperatures. A lower number means the oil is thinner and flows better at start-up temperatures. The number after the W describes the oil's thickness at the engine's normal operating temperature. For example, 5W-30 will flow more readily than 10W-30 at start-up temperatures. In Central Florida it is safe to use 5W30 or 0W30. I would never use 40 weight oil in a small engine here. I prefer the 0W30 oil to keep start up wear to a minimum.