Proof that 87 Octane fuel is limiting your 3.6

[bmpcamry09]

The 3.6 engine has been factory designed to run on 87 octanes. This Thread is just a well-designed sales pitch, to sell one on something that really is not needed! Plus, it will possibly remove some of the longevity out of your 3.6 engine. But they are your engines, so do whatever make you happy. If I really what more power in a vehicle, then the option is there, for a 392, or I will go purchase a Corvette.

The point of tuning for 87 octane isn’t all about power, it’s also a transmission tune. The engine lugging and working hard at low RPM can induce spark knock on 87 octane. Just look up “spark knock” and “pinging” on multiple 3.6 forums. It’s a known problem.

Since you have chimed in on two different websites with this, can you explain how keeping the engine from bouncing off the knock sensor constantly hurts longevity? And how a modest 87 octane tune that adds maybe 10 horsepower hurts longevity? Also, are you aware that this exact same engine and transmission are used in the Ram 1500 and in that it is rated for 20 more horsepower? The only difference is within the tuning.

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[Tripp]

The 3.6 engine has been factory designed to run on 87 octanes. This Thread is just a well-designed sales pitch, to sell one on something that really is not needed! Plus, it will possibly remove some of the longevity out of your 3.6 engine. But they are your engines, so do whatever make you happy. If I really what more power in a vehicle, then the option is there, for a 392, or I will go purchase a Corvette.

Tell you me know nothing about tuning without telling me you know nothing about tuning.
There is nothing wrong with not having experience in tuning, just don’t spread false info.
Something tells me you are more familiar with carburetors then fuel injection

BTW my jeep is not tuned and I have zero intention to tune it as of now. I have had many other vehicles tuned thiugh

 

[deanocraft]

I’ve never had a tune on any vehicle, but I am thinking about one on the JT. I just don’t know a lot about it yet. I know there will be a device that is needed. Does it need to stay attached to the car all the time?

In your product, do you provide a way to change the tune if you decide to fill up with premium rather than regular? In that case, would the MPV14 device need to be attached at least temporarily?

I’d appreciate a more detailed explanation of how it works from a driver/user standpoint.

 

[bmpcamry09]

I’ve never had a tune on any vehicle, but I am thinking about one on the JT. I just don’t know a lot about it yet. I know there will be a device that is needed. Does it need to stay attached to the car all the time?

In your product, do you provide a way to change the tune if you decide to fill up with premium rather than regular? In that case, would the MPV14 device need to be attached at least temporarily?

I’d appreciate a more detailed explanation of how it works from a driver/user standpoint.

Sure thing!

So the MPVI4 is a temporary thing only needed to be plugged in to the OBD2 port during tuning. The tune applies to the ECU itself. You’ll use a Windows laptop plugged into the MPVI4 with an included USB cord for the process. VCM Suite is HP Tuners software designed for the MPVI. You’ll use this software to flash your tune and also record live data from the engine while driving for me to review and ensure your Jeep is running the way it should be. Once the tune and datalog process is done, you can leave it alone for the life of the Jeep if you so choose.

You can switch tunes anytime, including back to stock. This takes about 3 minutes or less, depending on year. You’ll just keep the tune files on your PC.

My price includes unlimited revisions and I’ll also give you multiple files for whatever octane you plan on running.

You can always run a higher fuel grade than tuned for, but if your tuned for 91 for example and you are stuck putting 87 in, your still safe to drive gently until your able to flash your 87 tune back on. The factory knock sensor system will pull back timing as needed, but it may ping.

Hope this helps!

 

[bmpcamry09]

Tell you me know nothing about tuning without telling me you know nothing about tuning.
There is nothing wrong with not having experience in tuning, just don’t spread false info.
Something tells me you are more familiar with carburetors then fuel injection

BTW my jeep is not tuned and I have zero intention to tune it as of now. I have had many other vehicles tuned thiugh

I used to see this on the Ford forums. The old timers who grew up around carburetors didn’t believe that a simple tune could add 100 HP/100 TQ to an Ecoboost 3.5 for example.

This is the same crowd who likes conventional 10W40 motor oil, asks for a “lube job” every time they take their Toyota Prius to the dealership for an oil change, think everything is a conspiracy theory, think that 70s muscle cars were faster than modern muscle…..and I’m sure I’m missing some others

Always loved old head reactions when they actually experienced a good tune for themselves.

Cars in 2026 don’t run the same as cars from the 70s and 80s and that’s hard to get through to people.

 

[deanocraft]

Thank you, that helps. I’m normally an 87 user, but I live in the mountains and sometimes pull a 1,200 lb camper. When pulling the camper I prefer to spend the money on premium.

I know you have mentioned some hp gain numbers, but can you go back to that a bit… are you able to provide tunes that produce different levels of performance gains based on the type of driving expected? (Like frequent towing vs commuting… etc. ) I’m looking for more low to mid rpm power. I will rarely if ever wind it out to near redline.

 

[bmpcamry09]

Thank you, that helps. I’m normally an 87 user, but I live in the mountains and sometimes pull a 1,200 lb camper. When pulling the camper I prefer to spend the money on premium.

I know you have mentioned some hp gain numbers, but can you go back to that a bit… are you able to provide tunes that produce different levels of performance gains based on the type of driving expected? (Like frequent towing vs commuting… etc. ) I’m looking for more low to mid rpm power. I will rarely if ever wind it out to near redline.

Yep I can set it up however you want.

A more tow oriented file may have more aggressive shift scheduling, a little less timing, and aggressive richer WOT fueling to help keep catalytic converter temps happy. Even a set up like this can have a dramatic improvement.

A more performance oriented tune could net somewhere between 30-40 HP. But it may have extra spark timing, some different cam advance settings, and a different transmission set up.

I’ll be doing some dyno time on 7/15 and I’ll post up my results. I really don’t try to focus on HP/TQ numbers though. Driveability comes first.

My process is completely custom. Nothing is cookie cutter. My customers will tell me what they use their Jeep for and what they hope to achieve and we rinse and repeat tunes and datalogs until I am happy with the data I see and until it does what the customer hoped to achieve, within reason of course.

 

[Old Dogger]

WOW..I new that this was going to stir the POT.LOL This marketer deserves a pat on the back, because he really understands great sales pitches At no time did I ever say that what he was selling you on, was snake oil and doesn't work. What I said was that it wasn't needed. And I stand by that statement! There are always ways to improve on an item, but is the improvement really JUSTIFIED. In this case are some of you drag racing or towing heavy loads where extra power is needed. If so fine, then it is justified. Example: Big brake kits. If you install larger size tires, then one has affected the braking distance negatively, therefore the big brake kit would be justified. But if not, just to install the upgraded brake kit, and tell everybody look what I have, makes no sense..IMO As I stated in my post, if it makes you happy then go for it!
I am not here to get into a pissing contest, which would just be a waste of time! So, this will be my last response to this subject.

 

[bmpcamry09]

WOW..I new that this was going to stir the POT.LOL This marketer deserves a pat on the back, because he really understands great sales pitches At no time did I ever say that what he was selling you on, was snake oil and doesn't work. What I said was that it wasn't needed. And I stand by that statement! There are always ways to improve on an item, but is the improvement really JUSTIFIED. In this case are some of you drag racing or towing heavy loads where extra power is needed. If so fine, then it is justified. Example: Big brake kits. If you install larger size tires, then one has affected the braking distance negatively, therefore the big brake kit would be justified. But if not, just to install the upgraded brake kit, and tell everybody look what I have, makes no sense..IMO As I stated in my post, if it makes you happy then go for it!
I am not here to get into a pissing contest, which would just be a waste of time! So, this will be my last response to this subject.

I just wanted you to answer why you think a good quality custom tune, data logged and custom tailored for each individual Jeep, would lead to possible lower longevity? That's all. I don't mind forum banter if it serves a purpose or brings good knowledge and info.

 

[deanocraft]

Yep I can set it up however you want.

A more tow oriented file may have more aggressive shift scheduling, a little less timing, and aggressive richer WOT fueling to help keep catalytic converter temps happy. Even a set up like this can have a dramatic improvement.

A more performance oriented tune could net somewhere between 30-40 HP. But it may have extra spark timing, some different cam advance settings, and a different transmission set up.

I’ll be doing some dyno time on 7/15 and I’ll post up my results. I really don’t try to focus on HP/TQ numbers though. Driveability comes first.

My process is completely custom. Nothing is cookie cutter. My customers will tell me what they use their Jeep for and what they hope to achieve and we rinse and repeat tunes and datalogs until I am happy with the data I see and until it does what the customer hoped to achieve, within reason of course.

Thank you. My truck is a manual transmission if that makes any difference.

And a couple more questions for you… once the computer is unlocked and I have this MPV gizmo attached, can I also do other things like add the aux switches or set the auto start/stop to the off position when I turn the key?

 

[bmpcamry09]

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Thank you. My truck is a manual transmission if that makes any difference.

And a couple more questions for you… once the computer is unlocked and I have this MPV gizmo attached, can I also do other things like add the aux switches or set the auto start/stop to the off position when I turn the key?

Thank you. My truck is a manual transmission if that makes any difference.

And a couple more questions for you… once the computer is unlocked and I have this MPV gizmo attached, can I also do other things like add the aux switches or set the auto start/stop to the off position when I turn the key?

MPVI can do a few functions in VCM Scanner, like tire size/gear change, disable power steering, disable TPMS, clear adaptives, and read and clear DTCs. As far as auto stop start, those are settings I change within the tune itself and you don't have to have the MPVI connected for that. I default all my files to have stop start disabled at start up, but able to be turned on with the button if need be.

 

[Old Dogger]

I just wanted you to answer why you think a good quality custom tune, data logged and custom tailored for each individual Jeep, would lead to possible lower longevity? That's all. I don't mind forum banter if it serves a purpose or brings good knowledge and info.

First off, I am not new to Forums but rather have been in them since their beginning. As for my mechanical background, if I was to list it all, you would probably be in shock. As to your comments and questions: I don't disrespect you, because everybody has to make a living. One of your questions was, why is the 3.6 running 20 HP more in the Dodge trucks. That is a very good question! Does it have something to do with the power train components in each? I don't have a clue, but the factory engineering chose to do this for a reason. Now, you have chosen to ignore that reason and add additional HP to the wranglers. Why would you do that? Or did Stellantis give you this approval? Another question of yours: It will possibly remove some of the longevity out of your 3.6 engine. I used the word possibly. Has Stellantis tested your product on a dyno, to clarify this question?
I would certainly think that you would want to know for sure along with some testing facts to substitute what you are doing.

O.k., I answered your Forum Banter questions as you call it. LOL I don't want to turn this into a pissing contest, because in most cases they are a waste of time, and not looked at very favorably by the Forum Staff. I am now done with this Thread.

 

[Tripp]

First off, I am not new to Forums but rather have been in them since their beginning. As for my mechanical background, if I was to list it all, you would probably be in shock. As to your comments and questions: I don't disrespect you, because everybody has to make a living. One of your questions was, why is the 3.6 running 20 HP more in the Dodge trucks. That is a very good question! Does it have something to do with the power train components in each? I don't have a clue, but the factory engineering chose to do this for a reason. Now, you have chosen to ignore that reason and add additional HP to the wranglers. Why would you do that? Or did Stellantis give you this approval? Another question of yours: It will possibly remove some of the longevity out of your 3.6 engine. I used the word possibly. Has Stellantis tested your product on a dyno, to clarify this question?
I would certainly think that you would want to know for sure along with some testing facts to substitute what you are doing.

O.k., I answered your Forum Banter questions as you call it. LOL I don't want to turn this into a pissing contest, because in most cases they are a waste of time, and not looked at very favorably by the Forum Staff. I am now done with this Thread.

If he was offering off the shelf tunes, I would agree with being skeptical. But, he is having his customers data log for him to review.

Zero affiliation, never spoken to the dude. But, he obviously isn’t JUST selling a product. He has to be a “salesman” to sell his product. But, he has posted enough info to back up his statements

 

[DAVECS2]

The 3.6L pentastar was calibrated and developed with general resourcing. Take that for what it is worth. Your 3.6 can most definetly benefit from a quality tune by someone who understands the Trade offs. If you think stellantis put the A team on every engine out the door your living in the past. I have researched this engine quite a bit with insider connections. It had/has potential but was left as a general commodity engine.

 

[bmpcamry09]

If he was offering off the shelf tunes, I would agree with being skeptical. But, he is having his customers data log for him to review.

Zero affiliation, never spoken to the dude. But, he obviously isn’t JUST selling a product. He has to be a “salesman” to sell his product. But, he has posted enough info to back up his statements

Thanks man. Actually most of my info to back all this up is on the JL Wrangler forum, I don't have enough time to copy everything over here, but it is way more in depth over there.

https://www.jlwranglerforums.com/fo...calibrations-tune.164496/page-42#post-3492439

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