Lexus IS 350/IS 250 Real World MPG Numbers

41 messages, Last post on Jan 14, 2008 at 2:02 PM

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#40 of 41 MPG by jzalkin Jul 28, 2007 (9:01 pm)
I am at 28mpg with 70-80% hwy. I have found that it drops if using cruise control and dips at and above 80 mph.
#41 of 41 Observation by ar39 Jan 14, 2008 (2:02 pm)
I've observed Sunoco premium gives me a better mpg over other brands of gasoline, with 75% hwy 25% city driving in my 2006 IS250 AWD. Sunoco 91 - 28.4 Exxon/Shell 93 - 27.7 BP 93 - 26+ Measurements were taken in similar driving conditions. Also, these are not dash monitor reading but, miles/distance calculation. The car monitor shows variance of +1.3 miles.