MPG

[Burla]

only one cleaner proven to work, now over 5 boroscopes with RAM members part of that and the latest boro for the first time proves injectors clean as well. You need to manually clean throttle body.

check out the injector cleaning late in this vid

Carbon Build up REMOVAL - The real Redline SI-1 Review

This is carbon build up removal with Redline complete fuel system cleaner (Redline SI-1). Cleaning carbon build up is essential in engines. If you're asking ...

youtu.be

 

[Burla]

Redline si-1 cleans rings, pistons and injectors from above, and only one known cleaner cleaned the pistons from ground up. Valvoline restore and protect cleans under pistons and si-1 the top. Turn back the engine like new with these two products... With si-1 concentration matters most, so it is better to use two bottles at once then 2 bottles over 4 tank fulls. That test proves this.

INSIDE Valvoline's SECRET R&D Laboratory to UNCOVER the TRUTH

Every engine begins building up deposits the moment it starts up for the first time. Deposits in the piston ring grooves can negatively affect the performanc...

youtu.be

 

[Curmudgeon]

What is the average MPG impact? Mine 5.7L Hemi, is lifted, has slightly larger than spec tires. I run High Test in all my vehicles to avoid the alcohol. All driving, I seem to be a little under 16 mpg average.

Depending on the rear diff sounds about right for the first part. I have the 3.21 rear, the 3.92 is much more common. Depending on the wind direction and hills I get 22-24 at around 55-70mph. About 14-15 around town.

I am curious to hear about how "High Test in all my vehicles to avoid the alcohol" works though. Around here, the Mid-Altantic states, the only way to avoid ethanol is to run E0 or ethanol-free. Otherwise all grades have it.

 

[markabby]

What is the average MPG impact? Mine 5.7L Hemi, is lifted, has slightly larger than spec tires. I run High Test in all my vehicles to avoid the alcohol. All driving, I seem to be a little under 16 mpg average.

my stock 1500 5.7 usually gets 23mpg on a straight road, but, during the winter it does drop. i'm getting 20 now. I'm blaming the winter gas and i use 87 octane. the "ethanol ruins everything" has been corrected years ago. I run 22" tires.

 

[Rado]

Any state in the snow belt goes to Winter Blend Gas and your MPG usually drops!
Warm up time sucks gas !
As for fuel treatment I like TECHRON made by Shell !
Staying with Top Teir gas also helps keep inside motor a bit cleaner

 

[Magfan2]

Here in MT, Premium / High Test has no alcohol - info posted right on the pumps. I do not believe there is any change in formulation in Winter, there might be, but still no alcohol. I don't generally drive a lot of miles, and it is far better than what I was getting from my '79 Scottsdale! Just curious about the impact of lift and tires.

 

[Curmudgeon]

Here in MT, Premium / High Test has no alcohol - info posted right on the pumps. I do not believe there is any change in formulation in Winter, there might be, but still no alcohol. I don't generally drive a lot of miles, and it is far better than what I was getting from my '79 Scottsdale! Just curious about the impact of lift and tires.

Interesting. Kinda wish we had that here, but there are currently over a dozen stations offering 90 octane ethanol free, all within about 10 miles from me.

Two large (local) chains are doing it so it's easy to find.

EDIT: I found this...

"Ethanol Blend Requirement​

All gasoline offered for sale at retail stations within the state must contain 10% ethanol (E10). This requirement is waived only if a distributor is unable to purchase ethanol or ethanol-blended gasoline at the same or lower price as unblended gasoline. Premium gasoline is exempt from this requirement. Other exemptions may also apply. Ethanol is defined as fuel that is derived from an agricultural source and that meets ASTM Standard D4806.

(Reference Missouri Revised Statute 414.255)"

Link > https://afdc.energy.gov/laws/6083

 

[Biggfoot44]

Today , l'm halfway thru the same 200 mi round trip that l did when truck ( '17 Laramie 1500 , 5.7 , 3.92 ) was new to me .

Then was low 30's F , today single digit F .

Then was 21 plus mpg . Totay , almost 19 mpg . Same route , same speeds .

Temp account for most , or should l dig harder ?

 

[crackerjack1957]

Today , l'm halfway thru the same 200 mi round trip that l did when truck ( '17 Laramie 1500 , 5.7 , 3.92 ) was new to me .

Then was low 30's F , today single digit F .

Then was 21 plus mpg . Totay , almost 19 mpg . Same route , same speeds .

Temp account for most , or should l dig harder

Tires could easily drop 3 mpg.......some tread designs are more aggressive than others with more rolling resistance including your air pressure.
Also brake calipers dragging/sticking

Mileage & maintenance info would help with answers.

 

[dakotamar]

mine has gone down to 11.7 from 18. bigger winter tires and cold weather is my guess. winter gas, I can't speak for what it does. I may put some 89 in my next fill up and see how much of a diff that makes. we got alcohol in all blends of gas here in Canada. yes even the high test stuff...

 

[Tominator223]

04 5.7. When my mileage dropped it was dirty injectors. Cleaners did nothing. Removed , replaced with cleaned used injectors. Then cleaned old ones and have those sitting on stand by for next time.

 

[David James]

My 2016 5.7 Hemi 1500 Outdoorsman MPG has dropped off. Went from 20 mpg highway down to about 16 mpg and city went down to about 13 mpg. Manifold bolts replaced, new coils and plugs. Thinking about using an injector cleaner and running a higher-grade fuel. Any suggestions on a good cleaner would be appreciated!

Mileage typically drops during colder weather due to longer warm up periods, different fuel blend, stiffer bearing lubes and increased rolling resistance with softer compound tires. Make sure tires are properly inflated and that you’re actually getting the vehicle warmed up then driven.

 

[ExpressRules]

I normally get at least 20 mpg highway mileage on 89 octane non ethanol fuel.

 

[runamuck]

I pretty much always got around 20 on the highway with my "19 laramie 4x4 ccsb with the 5.7 and 3.92 gears . I get the same on my '22 laramie 4x4 ccsb 6.7 dsl. Towing our 10,000# 5th wheel I get 11 or so depending on the terrain and if I dont spend much time over 70.

 

[runamuck]

Interesting. Kinda wish we had that here, but there are currently over a dozen stations offering 90 octane ethanol free, all within about 10 miles from me.

Two large (local) chains are doing it so it's easy to find.

EDIT: I found this...

"Ethanol Blend Requirement​

All gasoline offered for sale at retail stations within the state must contain 10% ethanol (E10). This requirement is waived only if a distributor is unable to purchase ethanol or ethanol-blended gasoline at the same or lower price as unblended gasoline. Premium gasoline is exempt from this requirement. Other exemptions may also apply. Ethanol is defined as fuel that is derived from an agricultural source and that meets ASTM Standard D4806.

(Reference Missouri Revised Statute 414.255)"

Link > https://afdc.energy.gov/laws/6083

I have bought some in oklahoma a couple times when the price was not too bad. didnt really notice any big difference but would run it in my carbureted harley if it was sold around here. I have to replace the same cpl. of o'rings in the carb every riding season because they just disappear.

 

[Filthy Filbert]

I used to always use "top Tier " gasoline, but, for the past year i've been using BP Gasoline. It doesn't have the TT sticker on the pumps, so i wondered why and found this:

"No, BP gas is generally not considered Top Tier anymore, as they were removed from the official TOP TIER™ list around late 2021 for no longer paying the required fees, despite their own claims of high-quality additives like Invigorate® meeting or exceeding standards. While BP says their gas cleans engines and meets standards, the lack of official certification means it doesn't carry the recognized Top Tier logo, which is recommended by many automakers for preventing engine deposits, especially in direct-injection (GDI) engines. "

So, you have to just pay a fee to have TT sticker on your gas pumps?

Wait till you hear about making Kosher food! My ex wife works for a company that makes cooking oils, and if they want a particular blend of oil to carry the kosher label and charge more for it...it's a matter of calling the local rabbi in giving him a tour, a 'donation to the church' and he performs a blessing on the equipment. Which apparently wears off, because to keep the kosher lable, he's gotta come back on a regular basis...

 

[Magfan2]

There is a LOT more to it than that - I worked at a Kosher Camp one college summer break, though not Jewish. Here is a hint https://www.chabad.org/library/article_cdo/aid/82672/jewish/Koshering-Appliances-and-Utensils.htm

 

[Filthy Filbert]

Here in MT, Premium / High Test has no alcohol - info posted right on the pumps. I do not believe there is any change in formulation in Winter, there might be, but still no alcohol. I don't generally drive a lot of miles, and it is far better than what I was getting from my '79 Scottsdale! Just curious about the impact of lift and tires.

A lift will reduce fuel mileage because it puts the truck up in the air and allows more air to pass under the truck. Simply keeping low to the ground to reduce air under the vehicle greatly reduces drag/ air resistance. That's why race cars use splitters up front.

Larger tires will increase rotatioal inertia and will require more hp to get going. this can be countered to some extent with a gear ratio change as well but you have to balance the reduced power required to accelerate with overall RPM while cruising. Think about your old 10 speed bike. Put it in the low gear and you can take off from a stop with ease but you'll work your butt off if you wanted to try and hit 20 mph. put it in high gear an you can easilly do 20 mph but it's gonna be a huge workout to get there.

Plus, as said, tread design matters too. rolling resistance and grippyness of the tire to the road. My truck was getting 21-22 mpg on my drive to work but it had stock sized, street tires on it. I just put an all-terrain tire on it and went up a size for a little more sidewall and to make it look more like a truck and less like a low rider and now my mileage is down to 15-16, but the tires went on in October, likely just as they were switching to winter blend gas around here.

...and that you’re actually getting the vehicle warmed up then driven.

You're better off to just get in and drive it if you're worried about efficencies. Sitting idling to warm up the water in the block isn't going to do much for the gear oil in the rear diff, the engine oil temp, or the transmission (does the 8HP70 even pump fluid in park? the old 42/44/46/48 3 spd with OD transmissions didnt). Getting load on all those parts will generate heat faster than sitting idling, and when you're sitting idling, you're burning gas without even going anywhere.

 

[Filthy Filbert]

There is a LOT more to it than that - I worked at a Kosher Camp one college summer break, though not Jewish. Here is a hint https://www.chabad.org/library/article_cdo/aid/82672/jewish/Koshering-Appliances-and-Utensils.htm

No, not really. We're not talking about a kitchen that someone cooked some bacon in and now needs to make the space kosher. We're talking industrial equipment that processes nothing but cooking oils and packages them for sale in grocery stores where they can charge the customer more money because its "Kosher." These cooking oils are all plant based which is generally, naturally "Kosher" anyway. Obviously I was over simplifying it as they would run a cleaning process before running kosher product, but it wasnt anything nearly as complicated as what you posted.

 

[Biggfoot44]

Tires could easily drop 3 mpg.......some tread designs are more aggressive than others with more rolling resistance including your air pressure.
Also brake calipers dragging/sticking

Mileage & maintenance info would help with answers.

Same tires , same pressure . "New to Me" was December '25 .