Looking to buy a quart Maxlife power steering fluid to replace the PS fluid in the E430, it was changed with Valvoline MaxLife Power Steering Fluid about 4 years/50k miles ago. Pep Boys and O'Reilly both price it at $8.xx a quart, I bought it at Walmart for $4-5/qt 4 years ago, now 1 local Walmart doesn't have it.