I am doing them in my 99 turbo diesel. I bought one just to be safe, but 2 have come out easy. The other 4, after a little in/out and lots of PB Blaster and giving them time, are coming out little by little. I'd spend a little more on one but you can use them for so much more. If yours have been in for years, it's probably worth the peace of mind to be able to heat them up, spray some penetrant, and work them a little at a time.