TheCatsDomain.Com Message Boards: MPG

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Posted by PaulCat (Member # 513) on 06-22-2020, 04:13 PM:

I drive a 204 Toyota Tundra. About 4 years ago my check engine light came on. The scan said it was catalytic convertor. I figured no big deal. When winter came my gas mileage dropped to 14 mpg (I always got over 17 mpg since I bought the truck). In the summer it went back to normal. I assumed it was “winter gas”. Next winter, same thing. But the following summer it never went back to normal – it stayed at 14 MPG. Then over the last year and a half to two years I’ve been averaging around 11-12 mpg. So a few months ago I had both cat convertors and my exhaust system replaced. MPG didn’t change. I bought a new gas cap. No change. I put new spark plugs in it. No change. Last Thursday after golf I stopped and bought a new air filter for $19. MPG is now back to normal. Can you believe that? A simple air filter caused my MPG to drop like that. Over the last winter I was getting 10 MPG. Now all is well.

Posted by Old Norm (Member # 1482) on 06-22-2020, 05:09 PM:

A dirty air filter is like having the choke partially closed. Consequently, it guzzles gasoline.

Posted by PaulCat (Member # 513) on 06-22-2020, 05:41 PM:

And I found out the hard way!

Posted by m hamilton (Member # 127) on 06-22-2020, 06:08 PM:

I don't drive my Avalanche because it only gets 14-15 MPG. I've got a '19 Equinox that gets between 34-35 MPG as a daily driver!

Posted by PaulCat (Member # 513) on 06-22-2020, 06:17 PM:

Did your Avalanche always get that MPG, or did it use to be much higher?

Posted by m hamilton (Member # 127) on 06-23-2020, 04:31 AM:

I think 17-18 was about the best I ever got out of it.

Posted by PaulCat (Member # 513) on 06-23-2020, 08:23 AM:

Check the air filter! You might get back to 17-18. [Smile]

Posted by m hamilton (Member # 127) on 06-23-2020, 07:06 PM:

Good point, PC!