Poor fuel mileage Nissan Moco 2007

 Auto Repair Questions, Nissan  Comments Off on Poor fuel mileage Nissan Moco 2007
Sep 082019


I’m getting low gas mileage. We recently changed the air filter. Then cleaned o2 sensor, throttle body, spark plugs, and catalytic converter. The engine is in good condition. Average mileage is near 9.7

First Step

The first thing to do would be to see if there are any check engine light codes present. Next post the codes below and we can determine which codes may be effecting your fuel mileage.

What kind of mileage were you used to getting? Is this why you started throwing new parts at it and cleaning everything?

Have you tried fuel from a different station to see if there was a difference?

Possible causes

If you are letting the car warm up before driving it will decrease. Low tire pressure will also decrease fuel mileage. A clogged air filter or dragging brake caliper will also decrease fuel mileage.

Source: https://www.freeautomechanic.com/mechanic/forum/tag/fuel-mileage

Acura TSX 2005

 Acura, Auto Repair Questions  Comments Off on Acura TSX 2005
Dec 202016

2005 Acura TSXMy car is getting very poor gas mileage, about 10 mpg.
What could be causing this?
I have had it serviced at a few places, but there has been no resolution for this issue.


Is your check engine light on? You can get the codes pulled at just about any local auto parts store for free. The codes will give you a good indication on where to start with the issue. Post them below for more information on each code. A faulty engine sensor can have a drastic affect on fuel mileage.

According to fueleconomy.gov the in city fuel mileage on this vehicle is normally around 20 mpg. If you are letting the car warm up before driving it will decrease. Low tire pressure will also decrease fuel mileage. A clogged air filter or dragging brake caliper will also decrease fuel mileage.



Fuel Mileage 2007 Honda Odyssey EXL

 Auto Repair Questions, Honda  Comments Off on Fuel Mileage 2007 Honda Odyssey EXL
Aug 312016

2007 Honda OdessyI bought a 2007 Honda Odyssey which its fuel mileage is rated at 26 MPG on the highway, but I am only getting 20 MPG. I was able to get 24 to 26 MPG with my former car, a 2004 Honda Odyssey….. So I took my newer Honda to a mechanic and he replaced the 2 Oxygen Sensors, because he said the old ones were not opening, replaced coil on plug boot, replaced spark plugs, did a fuel system tune up, put on brand new tires, did a 4 wheel alignment and balanced the tires, and did an oil change. All at a cost of $1700. So I took the Honda on some trips on the highway and got the same… 20 MPG. I really thought that Big O Tires ripped me off, but my wife suggested that our new Honda was just sensitive to higher speeds so instead of going 65 miles per hour, I toned it down to 60 MPH and used the cruise control. Then my MPG went up to 22.5 MPG, but I still think that something is wrong. Thanks for any help on this issue. -Arnie


The air filter wasn’t replaced? Is the check engine light on? Any existing codes would be helpful to know. The fuel you put in the tank can also have a big impact on fuel mileage. Once this tank of fuel is run out try switching to a different fueling station. A problem I see often is the same fuel tanker that transports diesel fuel will transport a batch of unleaded without flushing the remnants. This causes the octane level to drop and will cause the engine to reduce ignition timing to avoid engine knock and damage to the engine. When this occurs your fuel mileage and performance suffer.


Easy on the juice: top tips for economical driving

 Auto Repair Articles  Comments Off on Easy on the juice: top tips for economical driving
Mar 062013

For almost every motorist, the rising cost of fuel is an annoying bugbear that refuses to go away. Whingeing about prices at the pumps may be a human right, but there are also steps everyone can take to cut fuel bills for themselves. Here are a few of the main points to remember for economical driving.

1 It’s the economy, stupid!
Have fuel economy as the key factor in mind when choosing a vehicle, whatever kind you’re looking at. In the SUV segment that could mean a Ford Escape Hybrid at 34 miles to the gallon, while for van drivers, the diesel-engine Fiat Ducato is a good choice with an impressive 39 miles to the gallon. Both cars are very resistant, something which makes them a reliable choice even when bought used. Then there is the electric option too, but for most people the fact that roadside chargers are about as common as white rhinos remains a dissuading factor.

2 Become a smoothie
When driving, avoid sudden acceleration and deceleration. Smoothness is the key to maximizing fuel economy, so brake steadily, change to a high gear as soon as you can, and switch the engine off if you’re going to be stopped for a long time. If necessary imagine you have a really pernickety driving instructor in the passenger seat, telling you to do all this.

3 No need for speed
Remember cruising speed (the most efficient speed for fuel consumption) is around 60mph in fifth gear for most cars. Yes it’s tempting to put your foot down, especially if you have an open road and an engine with horsepower to spare, but be aware this will cost you at the pump (around 6% of fuel economy is lost for each 5mph speed increase after 60). So on motorways make the slow lane your natural home and If possible, develop a Zen like approach to other motorists whizzing past you. Chances are they’ll be stopped by road works up ahead anyway.

4 Lighten up
Cars consume fuel when they have to do extra work. Don’t drive around with a boot full of stuff you don’t need to be carrying, or an unnecessary roof rack attached. Also, be very aware that operations like defrosting and air conditioning do consume fuel, so don’t use them more than you need to.

5 Don’t forget the TLC
Maintain your car well. It can’t be stressed enough that a poorly tuned engine nosedives in efficiency. You may think you’re saving money by never visiting the garage for a service, but you’re probably losing it not only in faster depreciation of the car’s value, but at the pump as well.

Why is my gas mileage worse in the winter?

 Auto Repair Articles  Comments Off on Why is my gas mileage worse in the winter?
Jan 212013

With fluctuating fuel costs we are all effected when it comes to fuel mileage. As we move into the colder winter months it can be anticipated that our fuel mileage will be worse. There are several reasons your fuel mileage is worse in the winter beyond obvious reasons such as letting the car warm up at idle for longer periods in the morning. Some would argue the tire pressure, but with tire pressure monitors on just about every car since 2005 we all stay on top of that for the most part. Some would argue the road conditions, but they get cleared pretty fast on the highways these days. So what other reasons?
The basic mechanics of how the engine operates is the largest factor. Engines today use electronic sensors to run the engine. It relies on these sensors to tell the engines computer how much fuel to inject into it and at what temperature. It also uses sensors to tell it how good a job its doing so it can make changes for you at different temperatures. So the Engines computer is set with a base parameter when it comes to the Air/Fuel ratio it needs to maintain the best possible fuel mileage it can deliver. When the Air temperature is colder you can fit more air into the same space and in order to keep the same air/fuel ratio the engine must have more fuel added. Once the engine warms up the outside temperature doesn’t change much even when it gets closer to the engine so you will continue to keep getting worse fuel mileage.
You can expect that once the outside temperature returns to warmer summer days that your fuel mileage will return.

Here is a great example:

How much worse?

Have a gander at these calculations for a Honda Civic hybrid at 60 MPH in varying ambient temperatures:



Look at the extremes: the coldest MPG is 28% lower than the warmest. (Source: hybridcars.com.)

Author: John Helton

Oct 062011

I have a 1999 camry with a 2.2 liter engine. This car has been running great but lately the fuel mileage has dropped way off. Like 15 miles to the gallon only. And i don’t see any leaks. What could be the problem? Thanks to anyone that helps

Apr 142011

What might cause my 1998 pontiac trans sport to suddenly be going through more fuel under the same driving conditions and gas quality?  The oil was just changed recently and this has not helped.

Feb 032011

recently my mother had a tune up done to her 98 oldsmobile, new plugs, new wires,oil change,and new O2 sensor and even had new tires put on. But now after that her gas millage has dropped from about 28mpg to about 18mpg. Is there anything that could be causing the poor gas millage. She is still using the same type of gas and isn’t driving more agressively. Kind of at a loss to why it would be getting such poor millage after everything that was done to improve the running condition. And she had the gas lines and tank checked for leaks and there were none. I have been trying to think of another reason but im at a complete loss as to what it might be.


Jul 302010

1989 Ford Ranger 6 cyl Two Wheel Drive Automatic 

I need a new FUEL SENDING UNIT but when I talked to a local auto supplier they asked if the sending unit was on the passenger or driver side. Is there anyway I can tell which sending unit I need to purchase without dropping the fuel tank?

Apparently, the sending unit for the “drivers side” is twice the price of the passenger side but when I searched EBAY to purchase a sending unit it never indicated whether it was for the drivers or passenger  side.