I have noticed something a bit strange with the texture memory usage of lfs on my pc. Basically, when i first load up lfs and look in options>graphics, my texture memory usage is nice and low, 14.2mb.

However, if i go and race and then go back to the main menu and go options>graphics again, my texture memory usage is 58.3mb!

I have got all settings on full (and am still getting a reliable 60fps) but im just wondering, how on earth can it change !?

When you load up LFS all that's loaded are the menu's. When you race, all the textures you need are loaded, which are held in memory unless something needs to replace them.