- wipers will fit & work as long as you buy correct sizes but won't have upward curve of OEM.
- hit or miss on Optima at Costco. You can pick up Optima at most natl parts stores (Pep Boys, AutoZone, Advance Auto, etc.). Advance always has a 15-20% off promotion on their website - so order online and pick up in store. In fact, right now they have a 25% off one using code BATX.
That said I've been a big fan of Optima batteries for a while. However, I'm finding it harder and harder to go w/ them. The reduced warranty (now just 36 month vs 84 previously) and price premium (typically 50% or more) make it harder to justify particularly when national brands and even some store brands now offer 48mo or more warranty. If I can pick them up on sale and w/in 25% price of comp brand I'll go w/ them. Otherwise, I'll just move on.
As for size, quick use of the forum
search function on pretty much every page would have yielded results for you days ago as it's been covered ad nauseam . . .
Group 48