View Single Post
Old 03-29-2008, 09:09 AM   #5 (permalink)
Batman Junior
MetroMPG's Avatar
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,472

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 55.97 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car - '14 Mitsubishi Mirage ES (base)
90 day: 72.89 mpg (US)
Thanks: 4,017
Thanked 6,904 Times in 3,581 Posts
Originally Posted by Chris D. View Post
can someone define what driving with load means?
DWL is essentially keeping the vacuum needle stationary, and adjusting your throttle to accomplish this. That means you'd be letting up going up hill and permitting your speed to drop & gradually regaining it on the down grade as you give it more pedal. It's the exact opposite of what your cruise control was doing, which is why you can outperform it.

yes, I want a sg, but money permitting..
You spent more on your new tonneau than a used SG would cost. Guess which one I would have recommended as the best way to improve your overall MPG?

Just buggin' ya. The vac gauge will help with your DWL.

Originally Posted by LostCause View Post
High vacuum indicates low throttle load which should mean low fuel consumption, but engine's operate at their lowest efficiency under low load...trying for high vacuum seems like rooting for the bad guy.
That's a mixed up perception that I see often. High vacuum at cruise is definitely the good guy.

There's a difference between lowest fuel consumption and best engine efficiency. With a typical engine at light loads, you'll probably get your best MPG well outside of your engine's best efficiency (BSFC) area.
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown

has launched a forum for the efficient new Mitsubishi Mirage - fuel efficiency info for Geo Metro owners - electric car conversion on a beer budget
  Reply With Quote
The Following User Says Thank You to MetroMPG For This Useful Post:
j12piprius (02-26-2011)