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  #1  
Old 01-07-2019, 02:27 PM
Sailmike Sailmike is offline
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Default Why is Truck MPG so Low?

The mileage on my Ranger is only 10 MPG. What are the possible reasons for this? I'm going to be taking an auto shop class this spring and I thought it'd be a good idea to know in advance what to learn at the college to see what I can do to solve this problem.
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Old 01-07-2019, 02:53 PM
Dirtman Dirtman is offline
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Default Re: Why is Truck MPG so Low?

About 10 million reasons... one thing you'll learn in shop class is diagnosing automotive problems is a very very very annoying process when the customer only gives you vauge useless info. Yes I'm mocking you but dont take it personally lol. Diagnostic work is 90% of modern auto repair, and gathering info is key to diagnosing.

Gather info. When did the issue start? Progressively over time or suddenly? Whats the maintenance record on the vehicle? Has anything been repaired recently before the issue? Is the check engine light on? Does the check engine light work? Are there any codes if so? Are there any other symptoms? Do you just drive like a crazy person with a bed full of junk?

Reasons include everything from a literally just worn out engine to bad tires and millions of things in between.
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Last edited by Dirtman; 01-07-2019 at 02:55 PM.
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  #3  
Old 01-07-2019, 03:01 PM
Sailmike Sailmike is offline
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Default Re: Why is Truck MPG so Low?

I think the problem is probably progressive, but I really have no idea. It's not like the mileage was checked periodically. The check engine light comes on periodically, but I haven't seen that light in awhile. Can you give me a general system to look in? Something to keep an eye on? A drop from 20 mpg to 10 mpg is a huge drop, so I don't think something like bald tires will give that big a drop.
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Old 01-07-2019, 04:23 PM
e.fisher26 e.fisher26 is offline
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Default Re: Why is Truck MPG so Low?

Plugs, wires, sea foam treatments in air intake, gas and oil.. (refer to you tube for sea foam treatments) all that brought my gas mileage up


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Old 01-07-2019, 08:21 PM
Dirtman Dirtman is offline
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Default Re: Why is Truck MPG so Low?

Quote:
Originally Posted by Sailmike View Post
Can you give me a general system to look in?.
The system that uses burning fuel and air to create rotational force would be the main one.
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Old 01-08-2019, 04:07 AM
crowdpleazer crowdpleazer is offline
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Default Re: Why is Truck MPG so Low?

Air filter, fuel filter, spark plugs and wires, a caliper that is dragging, bad or wrong oil, locked up fan clutch, dirty O2 sensors, dirty MAF sensor, all are simple things that can can cause bad fuel mileage and poor performance. You just have to get your hands dirty and start checking things out.
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