2mpg is worth it to me since I will be commuting a hell lot more this time around. My l-tuned springs aren't really comfortable anyways so the ride quality is minimal when I increased the pressure to 36psi. Not to mention, There is less of that boat feel around sharp turns. I flip my tires anyways so the inside and outside wear out about the same amount.

 

i would but my HRi's are unidirectional, theyre marked left and right, inside and out haha.

 

I've never came across tires that are specified for left and right mounting

 

Will do. I'll have to grab me some of these. $75 a piece isn't bad at all.

Versados are the same way I believe.

 

Theres a big thread in the LS400 forum right, with members getting ~25% mileage improvement from replacing their ECT sensor (engine coolant temp).

 

haha i know, i thought they messed up because on the rears the left side tread goes forward and the right side goes toward the rear, i was all confused

 

Man my mpg has been horrible ever since i bought the car a year ago (GS430 btw). Even before when the car was stock I never got over 15 mpg in the city and that's driving under 3k rpm 95% of the time. On the highway though my best mpg avg. was 23. Now with my mods and system I'm getting about 13 - 14 mpg city and I'll figure my highway mpg this weekend when I go on my long vacation ... Maybe I seriously need a tb cleaning lol

 

or you could be pedaling the **** out of her to hear the srt+tanabe mt

 

mmmmmmm sometimes ... no but seriously I did a test once and for a full tank i did not go over 2500 rpm even once !! and in the city i only got 15 mpg, and with highway city mix, only 17 mpg

 

Really? I think all of my tires have been unidirectional. I actually mounted them incorrectly one time and drove in the rain, kinda scary, LOL.

 

extra weight/current draw from the system could do it as well...

 

Do you have aftermarket +1 or 2 wheels on your car ? Installing 20" tire/wheel combo's generally are around 1" taller than stock, which will throw your "displayed" odometer mileage off around 6 % or so...your true mileage covered after 200 odometer miles would be 212 miles actual.

EPA ratings for this car was 17 mpg city.

Another thing, if you have a serious electrical load on your system because of a large current draw of a big stereo system, the alternator "drag" produced by the big amperage draw may be sufficient to drag your mileage down 1 mpg or so.

 

Also......does your state change the fuel blends it sells based on the seasonal climate change ? Seems more and more post about poor fuel economy are coming from the east coast regions.

 

I was just thinking the same thing after seeing all the posts recently about random drops in fuel economy.

 

Well I have about 800 watts of current running through my system, but I've noticed much more than a 1mpg drop. TB cleaning sounds good.