I have a '97 850 T-5 with 140k miles and I think the turbo is going. It's consuming oil, about a quart every 500 miles or so, and if I sit and idle for a while, it starts to smoke. I was thinking of upgrading while I was replacing it, but had a couple questions. Will a 16t be worth it? Would an 18t do me any good on a stock vehicle? I've read a bunch of posts and seen a few people running a T3. Thoughts? I was a VW guy before I bought my wife a V70 T-5, and shortly thereafter sold my Golf and bought this 850. Anyway, the T3 is a good turbo for the 4cy VW's, especially the T3/T4. I only bring it up because I'm trying to keep this all as cheap as possible. Thanks for any input.