So I have a TD42 with 168k kms and it's been using about a liter of oil to every 2000km. Some say it's too young to use oil and maybe I should switch to Delo400 and it will revive the oil springs.. is this true? One more problem is everytime it's cold it starts in one go and idles ok for about a minute then idle drops and eventually it stalls and takes time to start.. when it starts there's some smoke and it seems to be missing but when that phase of about 3 minutes is over its fine all day... what could be the problem I have fitted new original primer pump and filter.. should I have my injector serviced or do I have to touch my pump? Thanks in advance.