Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - New lower air dam for 2017 Chevy Full size van

EcoVan · 07-03-2022, 06:26 PM

was heavy traffic, which seems to help MPG on the van. I needed to get the alignment corrected and that was taken care of. AT 62 MPH in 7th gear ( of 8) was getting about 33 to 34. At 55MPH was getting an incredible 35 to 36mpg. I picked up 2 mpg at 62 MPH and I never checked it before at 55, but I never saw this kind of MPG.

I haven't been able to check MPG at 68MPH, which used to be the best MPG speed because I couldn't duplicate the conditions.

The van does seem to roll much easier at highway speeds and my employee that drives it regularly said it seemed to be doing better too.

I'd say the deeper air dam was a definite improvement. Its depth matches most on road SUVs. Front belly pan is next, maybe with front tire spats. Might be able to hit 40 MPG with this full size van with 2500 lbs in the back. Gotta love this 2.8 Diesel!

07-03-2022, 06:26 PM	#36 (permalink)
EcoVan EcoModding Lurker Join Date: Dec 2020 Location: Illinois Posts: 35 Thanks: 0 Thanked 30 Times in 19 Posts	Did some testing last night.... was heavy traffic, which seems to help MPG on the van. I needed to get the alignment corrected and that was taken care of. AT 62 MPH in 7th gear ( of 8) was getting about 33 to 34. At 55MPH was getting an incredible 35 to 36mpg. I picked up 2 mpg at 62 MPH and I never checked it before at 55, but I never saw this kind of MPG. I haven't been able to check MPG at 68MPH, which used to be the best MPG speed because I couldn't duplicate the conditions. The van does seem to roll much easier at highway speeds and my employee that drives it regularly said it seemed to be doing better too. I'd say the deeper air dam was a definite improvement. Its depth matches most on road SUVs. Front belly pan is next, maybe with front tire spats. Might be able to hit 40 MPG with this full size van with 2500 lbs in the back. Gotta love this 2.8 Diesel!