I dont know but shi* it must be nice to see 300+ miles a tank...
I am lucky if I get 240 before I have to fill up an dI run my car past when the light comes on.
You saying you got 380-400 before makes me think somthing is wrong with my car too... I mean I live in a city, Orlando, and I could understand like 50miles diffrent but damn over 100, lol I feel like my car is BROKE...
I use 93 oct.