Do vans with high tops get lower MPG than vans without a high top?

[magentawave]

I was wondering if anyone has noticed their MPG dropping after installing a high top on a full size van?<br /><br />Thanks<br /><br />Steve

 

[sl1966]

Seraphim can confirm this as a yes, but here it is in his own words ...&nbsp; <a href="/post/Conversion-Van-Mileage-5482817">https://vanlivingforum.com/post/Conversion-Van-Mileage-5482817<br /><br /></a>

 

[magentawave]

Thank you. &nbsp;<img src="/images/boards/smilies/smile.gif" alt="" align="absmiddle" border="0" />