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2005 Dodge Ram mpg has dropped from 17.5 to 15.5

Tiny
GREGORY D
  • MEMBER
  • 2005 DODGE RAM
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 81,300 MILES
In the last 4 months my mileage has dropped from 17.5 mpg to 15.5 mpg. I change oil and filters regularly, changed spark plugs and pcv valve last month, had a diagnostic test run with no issues (catylist, O2 sensor good, not missing). The engine sounds good. Would cooler to cold weather have any influence on mileage?
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Wednesday, January 28th, 2009 AT 11:45 AM

2 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Yes the colder the richer fuel mix needs to be.
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Wednesday, January 28th, 2009 AT 11:55 AM
Tiny
SKUNK APE
  • MEMBER
  • 2 POSTS
If they recently switch to E10 gas in your area that could cause a drop in mpg. I know people noticed 10% drop here in FL when they switched.
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Thursday, January 29th, 2009 AT 2:54 PM

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