I was looking in the manual and on the Autozone web site for oil types. In the book it indicates either 10w-30 or 10w-40. On the autozone site the ratings are broken down by temp range. the -15 to 85 deg F type is 10W-30. However, the range for above -15F is 10w-40 or 10w-50. Would it be better to just use 10W-40 since it seems to show up in both lists. What are the pros and cons between 10W-30 and 10W-40 or 50. What weight would keep the lifters from clicking?

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