Whats The Best Method To Install Vinyl Tile Flooring In An Old House?
February 6th, 2010 | 
Author: My wife and I decided to redo the kitchen floor with 1 foot vinyl self-adhesive tiles. After research, it said to try a leveling compound on the old floor so the design wont show through the new tile. Well, it didnt really work that well 
And it was decided to tear out the old sheet vinyl floor. Now we have 1/4inch plywood subfloor with all kinds of bumps of glue and old pieces of sheet tile all over. After research, the options are: Rip up the subfloor and put down new plywood or install luan over the old subfloor. We arent going to be in this house for long, a couple years at most and we were looking to improve the kitchen a little bit. Now this happened 
Trying to keep cost in mind, whats the best route? The tiles were only 39 cents a piece!! Hehe. Are there other options?
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Pull up the old 1/4″ stuff and lay new down. You can use luan or if you can’t find it use any thin exterior grade plywood. It’s available at any home center. It’s only about $8 a sheet. You can nail it down or use a air powered crown stapler. Be careful when scraping or sanding old vinyl glue. Many contained asbestos.
your best choice is to scrape up the glue off of the subfloor and make the surface farily smooth( i know it will be tough to remove it all ) and then lay 1/4 inch luan down and then your new tiles
hope this helps
You can buy liquid concrete that self levels just poor it out
it will provide a smooth surface to glue the new flooring to
Home Depot has product