car wash soap

I'm about to run out of car wash soap. I am now using turtle wax car wash concentrate.

I looked at the products available and several state they have wax in the soap.

My question is: Is it worth the extra money to get a car wash soap with wax or just find the cheapest wash available.

Does anyone have a consensus of opinion? Kinda like a poll.

Any suggestions would be appreciated.

how much of a price differance is it? buy the good stuff http://www.meguiars.com/store_meguiars/product_detailpage.cfm?sku=G-104&store=meg
5 bucks and it should last at least 6 months

i second using megs, thier nxt is top quality and like 5/6 bucks for a half gallon i think it is, that lasts me several summers

Thanks, I'll go with Megs.