Has there been a new patch since Y, because LFS seems to be lagging very bad for me now. It isn't lag where I get disconnected from a server though, merely everything slows down and I cant control the car. If there has been an update, I think it might be time for me to get a new PC.

It has nothing to do with LFS and everything to do with your PC. It could be any number of things, including adware/spyware, overheating, or some background program which is hogging resources. Or maybe something else entirely.

Maybe you are playing on a laptop (like myself) and you have some battery saving profile on (slows down the processor etc.).