View Single Post
Old 10-16-2009, 11:15 PM   #3 (permalink)
MetroMPG
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,882

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

MPGiata - '90 Mazda Miata
90 day: 53.56 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 57.23 mpg (US)
Thanks: 3,563
Thanked 6,366 Times in 3,295 Posts
The secondary advantage of synthetics is more stable viscosity at low temperatures. Which in a cold climate translates into easier starts & better efficiency but only while the engine is coming up to normal operating temps. The actual fuel economy gain in that scenario would be tiny, though.

It's worth noting that no major motor oil company (that I know of) claims "improved fuel economy" as one of the benefits of its synth motor oils relative to the same weight non-synth.
__________________
Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now in progress...
Ecodriving test:
Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote