I found this article
Quote:
Finally, to share some data: The National Research Council of Canada has done some testing in a wind tunnel on commercial trucks to see the effect that bug deflectors have on fuel economy. According to their study, bug deflectors decrease fuel economy 1.5% (or so). That’s not a heck of a lot of change. Another study of commercial trucks pegged the fuel economy decrease at about 3%. So the data suggests that the fuel economy impact of a bug deflector is minimal (1.5-3%).
Bug Deflectors Purpose and Gas Mileage - DualLiner Bedliner Blog
|
It is referring to big rigs.
__________________
1st gen cummins 91.5 dodge d250 ,HX35W/12/6 QSV
ehxsost manafulld wrap, Aero Tonto
best tank: distance 649gps mi 24.04 mpg 27.011usg
Best mpg : 31.32mpg 100mi 3.193 USG 5/2/20
Former
'83 GMC S-15 Jimmy 2door 2wd O/D auto 3.73R&P
'79 Chevy K20 4X4 350ci 400hp msd custom th400 /np205. 7.5-new 14mpg modded befor modding was a thing
87' Hyundai Excel
83 ranger w/87 2.9 L FI2wd auto 18mpg on the floor
04 Mitsubishi Gallant 2.4L auto 26mpg
06 Subaru Forrester XT(WRX PACKAGE) MT AWD Turbocharged 18 plying dirty best of 26mpg@70mph
95Chevy Blazer 4x4 auto 14-18mpg
04 Chevy Blazer 4x4 auto 16-22mpg
|