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Old 04-08-2012, 08:15 AM   #16 (permalink)
Master EcoModder
JasonG's Avatar
Join Date: May 2009
Location: Charlotte NC / York SC
Posts: 728

05 DMax - '05 Chevrolet 2500HD
90 day: 18.48 mpg (US)
Thanks: 119
Thanked 55 Times in 51 Posts
I drop about 1 MPG with bio-D but the engine runs much smoother.
I've been told by mechanics it cleans deposits out as well.
Ancedotally I've read on the internet it can swell pump head seals, stopping small leaks.
I accept the MPG loss for the overall enviromental benefit. I think they process it from soy around here.locally grown is always better :-)

I can't understand why my MPG's are so low..........
21,000lb, 41' Toy Haulers are rough on FE!

Last edited by JasonG; 04-09-2012 at 09:56 PM..
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