Looking to begin using Mobil 1 in my 2001 L. I live in Florida and was wondering what the difference is between 5 W30 & 10W 30 oil. I have 12K miles on it and was wondering what grade to go with.

Thanks

 

The first number in a multi weight oil represents the viscosity of the oil when it is cold and the second is the viscosity when it is hot. Therefore in a colder climate and oil is thick the lower the first number the better. In Fl. either one should work fine for you. Hope this helped some.

 

Thanks for the info.

 

Here check this out so your not just trusting me.
http://www.howstuffworks.com/question164.htm