Interstate sells good batteries but they are not all Johnson. Just as with other stores the supplier can vary. I have an Interstate battery made by US Battery. Do not assume the battery came from a certain supplier. It is flavor of the month. But make sure you get a fresh one as I said. Costco puts date stickers on theirs which is a nice touch (assuming the stickers are correct..)

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra