I get about 390-410 miles on the trip meter when the light comes on. That is with mostly highway driving though, everyone drives differently and drives in different conditions and areas, so everyone's answers will vary.

 

i'm usually getting about 15-18 mpg per tank average. I only drive about 10-15 miles a day. i was getting about 22 mpg in traffic driving 70 miles round trip for work. this is an 06 is350. just had my spark plugs changed too.

 

I drive 80% city so I'm my getting maybe 21.5 mpg so a full tank only gets me around 310 miles

 

If you drive at 60 with cruise control you should have no problem getting great MPG on the highway. Just make sure you go in the slow lane!

 

I've found that since I went with a 265/30-19 tire that it is almost DEAD on. I stopped taking manual calculations when the in-dash readout was within .1 on five fill-ups in a row.

 

Exactly. The cars calculations is inaccurate for me.

 

I just made This Thread, not realizing that this topic has been done to death.

 

my gas tank average is less than 1 mpg compared to manual calculation