I know for a fact that I won't do as well at 80. I have a customer out in Phoenix and I recorded my mpg out to Blythe. I was doing 75mph the whole way there and only got a little over 21mpg.
Sean, I replaced my T5 with a T56 after breaking the T5 twice. The T56 has a .62 6th and I have 3.55 gears and 245/45/17 tires. At 60mph I'm turning right near 1800rpms.
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