I have noticed the DIC is about 1 MPG under too. Getting about 15.8 on the first tank.

Makes me wonder how far off the speedo is to start?

Just got the Diablo and did the 65 HP tune with corrected tire dia of 33 inches. On the freeway it said I was going 40 when it was really about 65. Then got a brake warning for gosh sakes!!

But I could really feel the diff

Going to reset tonite using tire size vs dia and see if it takes and the code goes away.

FB