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MPG - After Doing Mods?

Tek74

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Tek74 Enthusiast

Tek74

Posted
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So, the only mods I've done to my 5.3L 4WD are an Airaid MIT, a Borla/GM Exhaust, and an Elite Engineering Catch Can. I also switched to Amsoil synthetic. Over the last 50-75 miles, I've only driven in the city. When I pulled into my garage today, I checked the computer and it was at 18.3 MPG. Once per day, I also give it a really quick Italian Tune-Up to about 3k-4k RPM after warming up the engine.

 

When I first bought the truck, I was averaging about 16.5 to 17.0 MPG. Excluding tire/wheel/suspension mods, has anyone else seen a post-mod MPG change?

tnchevy Senior Enthusiast

tnchevy

Posted
Posted

Vehicles also tend to get better gas mileage after they get broke in so your mods may or may not have anything to do with increase in mpg's.

ChevyMan2015 Enthusiast

ChevyMan2015

Posted
Posted

Vehicles also tend to get better gas mileage after they get broke in so your mods may or may not have anything to do with increase in mpg's.

 

What is considered broke in with these trucks?

FishinJ Enthusiast

FishinJ

Posted
Posted

With the GM Borla I've seen zero increase but have seen it go down due to my ears wanting to hear the exhaust more. If I drive conservative it goes up to where it shpuld be. I'm always between 18-21 depending where I'm going or if I'm pulling the boat.

Txjose Senior Enthusiast

Txjose

Posted
Posted

With the GM Borla I've seen zero increase but have seen it go down due to my ears wanting to hear the exhaust more. If I drive conservative it goes up to where it shpuld be. I'm always between 18-21 depending where I'm going or if I'm pulling the boat.

Same here.... I just have the Airaid CAI and because I want to hear the sound i mash the gas and my MPG suffers lol

 

This winter gas doenst help either.

 

Sent from my Note 4 on Tapashit

Tek74 Enthusiast

Tek74

Posted
  • Author
Posted

Vehicles also tend to get better gas mileage after they get broke in so your mods may or may not have anything to do with increase in mpg's.

 

Assuming there have been enough heating and cooling cycles, a car/truck engine is broken in by 1k miles.

All the mods I mentioned were done well after 1k miles.

Tek74 Enthusiast

Tek74

Posted
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Posted

This winter gas doenst help either.

 

Yeah, I hear that winter blend fuel makes a slight difference, but I've filled up at the same place all winter.

Txjose Senior Enthusiast

Txjose

Posted
Posted

 

Yeah, I hear that winter blend fuel makes a slight difference, but I've filled up at the same place all winter.

Slight????

 

Not for me. The best mpg was when i got the truck and used gas in Texas. This North Dakota gas is killn me lol

 

Good thing its cheap. post-143469-145537605667_thumb.jpg

 

Sent from my Note 4 on Tapashit

post-143469-145537605667_thumb.jpg

post-143469-145537605667_thumb.jpg

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Tek74 Enthusiast

Tek74

Posted
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Posted

I will admit that I drive for MPG most of the time.....anticipating traffic ahead and coating to a stop when possible. If I didn't, I'm sure it would drop down about 1 mpg. As you said, gas is cheap now, but I'm sure it's gonna shoot up again in the next year or two. I didn't buy a truck for fuel economy, but dislike wasting money as much as the next guy.

TJay74 Senior Enthusiast

TJay74

Posted
Posted

Actually most engines are not fully broken in until the 5k - 10k mile range, that is where I see the most increase in power and fuel mileage show up.

tnchevy Senior Enthusiast

tnchevy

Posted
Posted

I also feel that at least in the past it took at least 5k miles to get one broke in. My motorcycle took nearly 10k for it to really get broke in and now the power and mpg's are much better than when new. My silverado has 10k on it but my gas mileage has not changed at all really.

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