compression?

[FUBAR]

So the final figure was $7200. They rebuilt the thing, and to my amazement, the insurance covered it! I got the mechanic to do compression tests on all 5cylinders, and the results are 162 plus or minus 3. Is that good compression for a T5 engine? I understand that it's good that none of the cylinders deviate very much from eachother. The car gets 14mpg average now, as opposed to 18.8 before the cylinder head was replaced. What could be causing this? Bad sensor(s)? How to find out? The dealer says to wait until 2 tanks of gas have gone through the system to get long-term mpg results. 200 miles in, and it's not looking good.