Better Gas Mileage Mods

[swathdiver]

Don't rev the motor up to 2500 rpms when driving.  Keep it around 2000 while accelerating and use high octane, top tier fuel.  

[Huetatos]

38 minutes ago, swathdiver said:

Don't rev the motor up to 2500 rpms when driving.  Keep it around 2000 while accelerating and use high octane, top tier fuel.  

Iunno man. That 100 octane fuel runs for 10 bucks a gallon here. Don't think those gains are worth it.

[swathdiver]

It's great stuff, especially the 104 unleaded!  But I was referring to 91 and 93 the latter is what we have in my neck of the woods besides one station with Sunoco 100 at the pump two towns over.

 

In thirty plus years of driving, no matter the auto or gas engine, quality and octane does make a difference.  So much so that it costs more to run "cheap" gas because of the mpg lost; up to a point.  Fuel prices however have never reached that point whether they were high or low.
 

[SirenRed16]

It's great stuff, especially the 104 unleaded!  But I was referring to 91 and 93 the latter is what we have in my neck of the woods besides one station with Sunoco 100 at the pump two towns over.
 
In thirty plus years of driving, no matter the auto or gas engine, quality and octane does make a difference.  So much so that it costs more to run "cheap" gas because of the mpg lost; up to a point.  Fuel prices however have never reached that point whether they were high or low.
 

It was my thought that running a high tier gas is useless unless you're tuned for it? I know on the 6.2 it's recommended to run a higher tier gas than the 5.3 but is there any real testing done in a stock 5.3 running a higher tier vs lower tier makes a difference?

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[Z45]

There is nothing you can buy and put on the truck to increase mpg.  Lots of hype and opinions but none of those are realistic.  Save the money to spend on gas and don't waste it with mod's that do nothing.  Any high performance mod is likely to give you worse mileage.  Mor power = more speed = more fuel.  

[aseibel]

5 hours ago, SirenRed16 said:

It was my thought that running a high tier gas is useless unless you're tuned for it?

I agree. Only high performance machines with high compression can make use of the extra octane. For everyone else, you are wasting money buying anything but regular unleaded. Premium fuel has no more "energy" per gallon.

[Obscenejesster]

I agree. Only high performance machines with high compression can make use of the extra octane. For everyone else, you are wasting money buying anything but regular unleaded. Premium fuel has no more "energy" per gallon.

Whether or not higher octane fuel gives better MPG and more power is no concern to me.

All I know is that my 5.3 runs better with 89 or 91 octane. Anything less gives me a slight rough idle.

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[Donstar]

14 hours ago, Grumpy Bear said:

Take it or leave it.

 

6.)  Tail gate nets or running with it down/removed.

 

You make good suggestions.  This one caught me by surprise and good to know.  I thought no tailgate on an empty truck reduced resistance.

[KARNUT]

I’m a butt head so I’ll say it first. If you don’t need a truck for work drive a car. I’m retired I save 10$ a week driving a car. I have a truck not my daily driver. My car averages 30 miles per gallon, my truck average 15. It faster, easier to drive, it has a high safety rating. So if gas mileage is a problem buy a used truck for fun a car for work.


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[Grumpy Bear]

1 hour ago, Donstar said:

You make good suggestions.  This one caught me by surprise and good to know.  I thought no tailgate on an empty truck reduced resistance.

I did to and for a long time. That is until I saw some wind tunnel test. Shortly after I read a paper from a grad student's theses he published where he and his fellows did some pressure modeling of various layouts for pickups. Then there is professional truck oval track and road racing. Tailgates and bed covers. Even when the bed is uncovered that tailgate pressurizes the box area to 'act' like a solid shape. Air is weird. It's measurement isn't new to me. I've done cylinder head work on a wet bench. It doesn't always do what seems like it should. 

[Grumpy Bear]

12 hours ago, Obscenejesster said:

Screw better gas mileage. I'd rather have 15mpg and no AFM than 19mpg with it.

There's that 'better' word again. Twin context. Initially he means 'more'....then he means 'personal preferences' but first he wants to have sex with the idea. 

 

[Donstar]

Great information!  One added point about fuel saving that hasn't come up yet is environmental impact.  For reasons beyond my comprehension, some dismiss the impact of fossil fuels on our environment.  I appreciate that I am a hypocrite by expressing concern for the environment and using a truck as daily transportation.  This does not prevent me from refraining from wasteful practices.  

[KARNUT]

Ok I can’t help it, fossil fuels cause pollution ( much less these days) global warming that’s debatable. In the seventies it was cooling.


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[Huetatos]

10 hours ago, swathdiver said:

It's great stuff, especially the 104 unleaded!  But I was referring to 91 and 93 the latter is what we have in my neck of the woods besides one station with Sunoco 100 at the pump two towns over.

 

In thirty plus years of driving, no matter the auto or gas engine, quality and octane does make a difference.  So much so that it costs more to run "cheap" gas because of the mpg lost; up to a point.  Fuel prices however have never reached that point whether they were high or low.
 

I know. I was just screwing with you. I've hand tested 87 vs 91 (thats our regular vs premium here) and it didn't make any noticeable difference. Although my truck has never gotten more than 14mpg city here even stock. 

[Nickel7]

On 11/13/2017 at 10:38 PM, Alex Campomizzi said:

Hey guys,

 

I was curious to hear what you all have done on your truck for better gas mileage and what you think the best grade of gas is to use for gas mileage.

I have a 2017 Silverado custom and get about 19 average.

If you spend $500 on mods and increase your average by 2 mpg (19 up to 21), it would take you over 40,000 miles to recoup your investment. That's assuming there's mods that would actually give you that increase and that gas stays at $2.50 per gal. I to strive for better mpg, but at the end of the day the how much did I actually save by driving like a grandma? If I do the math, for me it's about .50 cents per day. Some days it's worth it, but most days I'd rather use every single one of the horses under my hood.