2005 Dodge Ram mpg has dropped from 17.5 to 15.5

2005 DODGE RAM
81,300 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
GREGORY D
  • MEMBER
  • 1 POST
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?
Jan 28, 2009 at 3:45 AM
Advertisement
Avatar
DOCFIXIT
  • ✓Experienced Mechanic
  • 18,828 POSTS
Yes the colder the richer fuel mix needs to be.
Jan 28, 2009 at 3:55 AM
Avatar
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.
Jan 29, 2009 at 6:54 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.