i live in southern florida, it is never cold here. what weight of oil do i use for my 1984 diesel car? thank you so much for any help.

Both mechanics in my household advise 30 SAE, but suggest looking in your owner's manual for the fluid specs.
Also, when you ask car questions, it is really helpful to include the make and model of the vehicle in question....after looking at some of your past questions, I'm guessing this is the Mercedes?

Sorry, I should have used the model ect. And your right it is the mercedes 1984 300 td.
thanks for all your help.