Hello guys,

I read the section about oil viscosity and know that this is discussed many times since now, but a very stupid question I have never thought I would ask.

What's the lowest ambient temp. for using 10W30 oil?

My Honda manual says 20°F but found on the internet -20°F also - http://www.aa1car.com/library/oil_viscosity.htm

Usually I use 5W30 but because the engine has 130K miles on it and burn oil decide to go with 10W30.

Thanks in advance!