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Old 07-27-2016, 10:25 PM   #1 (permalink)
19bonestock88
Master EcoModder
 
Join Date: Jun 2016
Location: KY
Posts: 1,352

IGL - '04 Saturn Ion
Team Saturn
90 day: 56.19 mpg (US)
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Thanked 366 Times in 269 Posts
Ditching cruise control, big FE gain!

So I did some highway driving today, and decided to not use cruise control on the interstate, because on hills it kicks the transmission into 3rd gear and the engine is running 4500RPM... Instead, I would cruise at 80mph and gradually feed in max throttle(without a downshift) as I start uphill... Even on hills, my lowest speed, unless influenced by traffic was around 70mph with 100% engine load at around 53% throttle position... FE was way up though; I averaged 37.8mpg over 90 miles there and 36.3mpg on the 90 miles back, with similar temperatures(around 90F ambient)... Only difference is that on the return trip, traffic was gridlocked for about five miles...

Previously,my best highway average was around 33.5 combined, with cruise set...

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