Diesel fill-up add power?

[steamboat87]

This is kinda a two part question. The other day, I filled up a full tank at a petro station I've used before, and I drove a bit without sending a tune (MM3, DoubleRDiesel), and it was like driving a different better vehicle. Power, throttle response, gas mileage everything, felt like a new truck. That's before sending a tune. Can/Does a full tank actually do anything noticeable like that? It was obvious. And that's where the other part comes in...

I have the MM3, and i can't tell or "feel" a difference when sending tunes about 8/10 times. Feels like the truck is stock, stock as in breathing exhaust gas, poor throttle response, etc. Only sometimes when I send a tune it will work, as in that excitement you get by feeling it work! Do y'all fee a noticeable difference with tunes? I don't know what my question is really or where to go. Talk to Ray? Call MM3? Re-install the tuner? Any thoughts would be appreciated, helpful or hurtful. Thanks!


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[steamboat87]

I sent this from my phone. I was unaware I was in the exterior modification section. I'll dig into moving it when I get home. Apologies!


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[9mgcb81]

Did you use a different station than usual? Meaning filling up with different fuel than the previous tank

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[Cummins7]

This is kinda a two part question. The other day, I filled up a full tank at a petro station I've used before, and I drove a bit without sending a tune (MM3, DoubleRDiesel), and it was like driving a different better vehicle. Power, throttle response, gas mileage everything, felt like a new truck. That's before sending a tune. Can/Does a full tank actually do anything noticeable like that? It was obvious. And that's where the other part comes in...

I have the MM3, and i can't tell or "feel" a difference when sending tunes about 8/10 times. Feels like the truck is stock, stock as in breathing exhaust gas, poor throttle response, etc. Only sometimes when I send a tune it will work, as in that excitement you get by feeling it work! Do y'all fee a noticeable difference with tunes? I don't know what my question is really or where to go. Talk to Ray? Call MM3? Re-install the tuner? Any thoughts would be appreciated, helpful or hurtful. Thanks!


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You dont use an obd splitter do you?

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[F350Cummins]

long and short, with fuel, yes its possible. Diesel is not regulated as well as gasoline and I have had similar experiences. I track MPG Every tank and drive the same route regularly to and from work so a lot of my tanks are similar to almost identical driving conditions and winter blend I had a 2MPG difference based on where I filled up. The summer blend I am seeing almost 4mpg difference although the temperature has a further spread as well. I have noticed locally quick check fuel seems to offer me the highest mpg and good power. Fuel on 10 (local chain) is dismal all of my lowest mpg tanks are from 1 of their stations

As for sending the tunes to the truck, I always notice, my base tune is 30, and I notice the 60, 90 and 120 being loaded If your base tune is higher you may not notice it as much because it is already well improved over stock. If you think it is sucking through the EGR, monitor it. have you tried to flash the ECM tune again then try using the RT tunes?

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[9mgcb81]

long and short, with fuel, yes its possible. Diesel is not regulated as well as gasoline and I have had similar experiences. I track MPG Every tank and drive the same route regularly to and from work so a lot of my tanks are similar to almost identical driving conditions and winter blend I had a 2MPG difference based on where I filled up. The summer blend I am seeing almost 4mpg difference although the temperature has a further spread as well. I have noticed locally quick check fuel seems to offer me the highest mpg and good power. Fuel on 10 (local chain) is dismal all of my lowest mpg tanks are from 1 of their stations

As for sending the tunes to the truck, I always notice, my base tune is 30, and I notice the 60, 90 and 120 being loaded If your base tune is higher you may not notice it as much because it is already well improved over stock. If you think it is sucking through the EGR, monitor it. have you tried to flash the ECM tune again then try using the RT tunes?

This is correct. The statement of regulation

There is not a regulated formula for diesel fuel by government or state. Each oil company blends their own way and it can actually be slightly different each time depending on the engineering setting everything up
Or by the company ordering the fuel for their locations. BP, Casey's, etc....

Vehicles of certain years are designed to run on B5, B11, B20. Older diesels aren't designed for biodiesel. Example my 09 is B5 compatible. Most stations if you look the stickers say biodiesel between B11 & B20
I only go to Casey's locally since it's bio-free then run an additive

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[9mgcb81]

Video with some good information that's accurate as far as the fuel information. The additive is all up to you. Some are better than others. I have posted numbers for my truck and driving using different ones over several thousand miles in same conditions for each

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[steamboat87]

Thanks for the replies. I have used this station before, but I believe it was two fillups ago. I'll check out the video when I get home...government computers don't allow you to view videos and have fun...wait, I'm at work, I'm not on the computer

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[steamboat87]

I do not use an OBDII splitter. Why do you ask? What would be a reason for doing so? I'm up for suggestions.

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[AnOldBiker]

One thing that is general not known is fuel at each station is NOT from the stations refineries. I live in a state that does not have any refineries. But we have fuel stations that are brand names, bp, Exxon, Shell .....

Since they do not have refineries within this area, they still need supplies for their contracts.

Enter "The Spot Market"

This is a common market that pulls from an underground piping system supplied by all refineries throughout the country. They put in base stock gasoline or diesel they have above their contract amount for their own stations, either personally owned or contract agree stations. Most stations are under contract ... but privately owned.

The station calls in an order, or it is agreed that they will have delivered a specific amount, minimum each month, and agree quanities shipped at specific days and time. The companies will set this up with the specific Spot Market blending/ delivery point in that area and it begins. The spot market will draw from the under ground line and hold this in storage tanks. Then when a truck pulls up to be filled, will set their blenders for the additives required from the ordering companies and start filling the trucks with the agreed blend. This can or will be changed with each tanker being filled. The truck will then deliver the blended fuel to the station on the ordering form.

So in truth:
1. you might have the base stock blend from every refinery that is in this country in one order.
2. you might have the specific additives ordered from the company .. or maybe not, depends how good the blenders, how accurate the machines are and their document.
3. you might have a delivery ment for one station mistakenly delivered to another.
4. actually, most blends are so close to each other in the area, it's almost buying the same fuel at a different station and a different price.
5. and due to governmental regulations imposed on fuel suppliers, there are 50 different blends of gasoline in the United States so far. (subject to future govermental control)

Also, the chemicals used for fuel additives are from the same additive suppliers for all gasoline/diesel fuel suppliers. But the % per gallon is what is different. One company will add "X" amount more of one chemical than another company will, thus being 'their patented blend'. (The company I worked for, and many others, did this to get out of a law suit in the past.)

Now I've been retired for over a decade, but I don't think nor heard that this has changed yet.

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