Bob,
You can avoid most of the what weight, etc by using the closest synthetic to whatever is called for in your owner's manual. I assume for FL temps it could be anything from a 30W to 10-40 as a function of whether you change from cool time of year to hot time of year.
Personally, I would use Mobil 1 10W-30 in winter and Mobil 1 20-50 in summer - i.e. change in between. I used to live in FL and know that it can get so hot, many can't imagine using a 20-50, but I think it is logical.
Another point - since synthetic flows better in the winter than non-synthetic, I suspect 20-50 would be OK for most of the year.
Bottom line point from me that you will hear consistently is to USE SYNTHETIC LUBRICANTS - THEY ARE BETTER IN EVERY RESPECT.
George
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