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Discussion Starter · #1 ·
Just did a 1900+ mile round trip in my 2008 IS-F and noted the ETA on the navigation screen was off by about +2 hours ... until the last 20 miles.

For example, on the return leg with 250 miles remaining to "home" at a steady 80 mph the ETA was 5hrs 20mins! The remaining travel distance to destination is calculated correctly.

The system has the 2011 DVD installed.

Anyone else experiencing this issue?

BTW ... for those interested, the return trip of 951 miles was done in 13 hours with an average speed of 79 mph at 28.1 mpg. The three fuel stops were all Chevron 91 octane. Quite impressive fuel consumption, I thought.
 
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