If I'm doing all highway driving, I can hit 800 km at the 1/2 tank mark...that's a vented tank of course, but an otherwise stock 5spd ALH car with 300k kms on it. I get over 1200 km on every tank...and I'll get a little over 1300 km if I'm doing a lot of hwy driving.
However, I just installed new DLC520 nozzles on freshly balanced injectors last weekend, so we'll see if there's any MPG improvements with them.
My car is working pretty well as it is...I think any gains at this point will be minimal at best...but I'm always optimistic
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I did a lot of reading on the ECO Tune for the ALH...reviews are few and far between. The darn things are pretty efficient just the way they came from Germany...or Brazil...or Mexico...whatever...lol.
JMTCW,
Rem