Ill have to check to see what the burner is, do i have to take it apart and pull out the little burner that the nozzle hooks to or the model of the whole unit,
As for asking the service tech i have asked before and they just put in whatever was in there before. So if someone made a mistake years ago it would have just carried over.
The burner usually has an ID tag on it on the outside of the blower housing.
Unless you know what you are doing, I would leave it alone and not take anything apart yourself. Try another tech. I know how difficult it is to get a good tech from an oil supply company, especially. There are HVAC companies that have good techs, and know and care how to do the job correctly.
I never had one tech from an oil company do a good job in over 40 years! It is pathetic, but you get what you pay for.
A pro company that does installation and service, and no interest in selling you more oil, will charge me about 250 bucks to clean and tune my heating system. Maybe in 10 more years when I'm to old and lazy, I'll spend that, if I have any money.
So, I have to take back what I said in my post #4; you get what you pay for. an oil company is interesting in selling you oil, and their service contracts and techs they send out, from my experiences anyway are a poor value at whatever they charge. Maybe OK for an emergency "no heat" job, but for getting it set up correctly: Feh! Cleaned well? Are you watching?
Hey, its my opinion anyway. And I am no pro; just in a chatty mood at the moment
I still think you need to get a new tech there at least once to get it checked out and see if it can be made to run more efficiently. The nozzle in there now may just be the right one for you.