from the factory rotaries (aka lawnmower engines) feed sump oil into the carby at a slow rate for lubrication.

when building my bridgeport we ditched the standard oil metering pump and i now run premix into the tank, rather than inject dirty sump oil. It burns cleaner and you know that your engine is recieving the lubrication it needs. its common for the factory setup to stop working or block up, and you wont know till its too late.

you get a lot of funny looks at the servo tho hehe

anyway back on topic

my ute has carpet all the way up the back panel and around the rear window which meets the roof lining. more of a felt than carpet should i say... i think thats what your question meant rather than whats sitting behind my seats ?