I bought the Costco Interstate for my Sister's 2006 Corolla...she parks outside at her apartment and it has survived just fine for 2 years thus far...replaced a regular Interstate that was 6 years old (in the car when she bought it)...I priced the usual suspects and the Costco one cost less than Walmart or Menards (their AC Delco version) and the Interstate is made by the same people who made the Walmart Everstart Maxx (Calories here...at the former JCI plant in Wisconsin)
Bill
Bill