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Loss of fuel economy

14K views 83 replies 18 participants last post by  silvertank 
#1 ·
Lost about 4 to 5 mpg since last oil change . Started off about 2mpg average and has been increasing slowly since, brought it up to the dealer and they told me nothing they can really do about it as its super hard to diagnose but to test the oil when i change it again and let them know if anything abnormal shows up. gonna change he oil this week and up date to see whats going on my average mpg stays pegged around 30 now instead of around 39 to 42. Im averaging 37 to 39 where i was averaging 41 to 42 calculated by each fill up. Anyone got any idea it should have went up not down
 
#78 ·
Very interesting. i assume that was covered under powertrain warranty? have you noticed a difference in fuel economy since the replacement?
 
#80 ·
i am glad to hear it was covered. Keep us posted on the results!
 
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#83 ·
Ouch! Tell your car "that's enough!" Hopefully there's a light at the end of this tunnel
 
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