5.5 quarts 5w-30w
8 quarts
2003 cad deville takes 4 quarts of motor oil
11
11
total of 16 quarts
12
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It takes 5.5 Quarts with a fresh filter.
If it's the base Sedan Deville with the 4.9 liter, it's 5 quarts with the filter. For the Deville Concours with the Northstar, it's 7.5 quarts with the filter.
7.5, but you'll be good with 7.
According to my Cadillac dealer, the 98 DeVille holds 8 full quarts 7 1/2 quarts to the center of operating range only add 7 1/2 at oil and filter change!!
My 4.9L takes 7 1/2 Qts. with filter