Thanks for the tips,
4kRPM is in 3rd gear at 50-55mph..
Car is usually at 190 degrees.. and in traffic it heats up to 200-210...
I tried my firends 2009 solstice, his clutch is much softer and smoother (he told me something about hidraulic clutch?)...
btw 10 year old base boxster feels soooooo much better on the road that a brand new Solstice

his clutch and shifting though is much nicer and more responsive
Thanks again for tips!
Sasha
PS: I'm getting around 18mpg (but previous owner changed stock 16 wheels to 18's and I'm not sure he updated speedometer)