View Single Post
Old 02-04-2013, 01:59 PM   #15 (permalink)
Miller88
Master EcoModder
 
Join Date: Jul 2008
Location: NY state
Posts: 492

XJ Cherokee - '00 Jeep Cherokee Sport
90 day: 12.96 mpg (US)

FoFO - '11 Ford Focus SE
90 day: 36.78 mpg (US)
Thanks: 1
Thanked 48 Times in 36 Posts
Oil will turn black as it cleans, or just from every day usage. Is it possible your engine is hard on oil? Or did it have previous sludge problems? I really wouldn't be concerned about an engine turning the oil dark quickly.

Get a used oil analysis done ... that will let you know if you have a problem.
  Reply With Quote
The Following User Says Thank You to Miller88 For This Useful Post:
wmjinman (02-04-2013)