richy350

Weather finally warmed up in Canada. This is my first summer with the is350 (65,000miles)

Today I noticed on the have cluster bar graph when I was the highway on cruise control it was showing 30+mpg on the graph.

My city has lots of long roads so I was constantly turning on/off cruise control to coast to redlights.
Is it because the weather finally warmed up?
When I used cruise control on the highway in winter I would get like 20-23mpg.

Or is the computer lying to me?
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flowrider

iTrader: (9)

I never use the computer - I check manually

Lou

mcomer

Trip computers are generally a bit "optimistic" and flowrider is correct if you want precise MPG records.
Seems a little early in the season but perhaps fuel stations in your area have already switched over to
Summer Blend fuel. Winter Blend evaporates more quickly to aid cold weather starting, Summer Blend
less so to minimize pollution. Generally no signs or obvious price but you might ask your station operator.
The summer stuff might return better MPG's. Controversial topic.. might you have been using Regular
Grade fuel and recently splurged and fed her the good stuff? Theory is that Premium advances the
ignition timing and improves power and MPG.