looks like an old thread, but I'm new here and considering a '97 T5 wagon. Why are all of your mpg results so low? Is it purely the T5 that gets poor mpg? I owned the 1997 850 awd sport wagon (low pressure turbo, 5speed manual) It was 3 years old when purchsed it and I drove it like I was on a rally...

I have seen an engine from a 240 in a 1800 as well as a 740 turbo engine in a 1800.
sorry I can't give you any details as to modification specifications. but yes it can be done