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    Thread: Fuel Efficiency Upgrades for 3.6L VR6

    1. Member KarstGeo's Avatar
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      07-16-2019 06:30 AM #51
      Quote Originally Posted by SunDevilDrake View Post
      Results after K&N drop in:
      Highway: 25.2 mpg at ~65mph (first 90 miles)
      Interstate: 23.1 mph at ~82mph (last 300 miles)

      Drive was from Phoenix to San Diego in the middle of Summer so the AC was on the entire ride. 3000 foot elevation gain to mile 275. 3500 foot elevation loss from mile 275 to 390.

      Didn't run it with the stock Mahle filter long enough to see what the difference was between the two.


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      It would have been the same.

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      2018 Atlas SEL VR6 4Motion - K&N drop-in, deAuto interior, fog, and full tail LEDs
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    3. 07-16-2019 11:48 AM #52
      Thought so, although was hoping for a 2-3% increase with the hills and the AC. At least it sounds better when accelerating and gives me some butt Dyno HP (Sarcasm). Placebo effect of course. Lol


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    4. Member KarstGeo's Avatar
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      07-16-2019 12:42 PM #53
      Quote Originally Posted by SunDevilDrake View Post
      Thought so, although was hoping for a 2-3% increase with the hills and the AC. At least it sounds better when accelerating and gives me some butt Dyno HP (Sarcasm). Placebo effect of course. Lol


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      Think about it - if VW could nab 2-3% increase in mpgs with a higher-flow filter, they would.
      2018 Atlas SEL VR6 4Motion - K&N drop-in, deAuto interior, fog, and full tail LEDs
      2018 Golf Sportwagen S 4Motion DSG - Unitronic St2 IS20 ECU/St2 TCU/downpipe/K&N drop-in+air box/duct mods+block off/CTS TIP+TIH+TMD/034 dogbone insert/Golf R RSB

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    6. Member Savvv's Avatar
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      07-16-2019 01:13 PM #54
      Quote Originally Posted by KarstGeo View Post
      Think about it - if VW could nab 2-3% increase in mpgs with a higher-flow filter, they would.
      Not necessarily true. Every Unitronic tune Iíve ever done has netted roughly 3mpg increase in fuel economy simply from software. Thereís probably good reason we have what we have and itís not always because that was the peak of engineering ability. More than likely itís $$

    7. 07-17-2019 11:47 PM #55
      1138 miles round trip. Mix of highway (65mph), interstate (75), and city driving. Net MPG for this trip was 22.2 mpg with the drop K&N. Side note, we made 7 stops combined both ways (gas/food/bathroom/border patrol). Also, I don't have a light foot and usually average 7-10 over the speed limit.


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    8. Member KarstGeo's Avatar
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      07-18-2019 09:15 AM #56
      Quote Originally Posted by Savvv View Post
      Not necessarily true. Every Unitronic tune Iíve ever done has netted roughly 3mpg increase in fuel economy simply from software. Thereís probably good reason we have what we have and itís not always because that was the peak of engineering ability. More than likely itís $$
      I too have a Unitronic tune on a VW (my Golf Sportwagen) and have seen a *slight* bump in highway-only mpgs. Overall mpgs are down as the around-town mpgs dropped a bit mainly from more aggressive driving on my part - and it makes sense, you aren't going to add ~80hp and improve overall mpgs, just not logical. The OEM is doing their best to give you the best mpgs, drivability, power, and engine longevity all in one package. So yes, you can do things to improve the mpgs a little but you also (IMHO) are losing something somewhere else.

      From Unitronic's site for my tune:

      "Optimized timing and injection under cruising condition for an improved fuel efficiency."

      I have to believe if VW could have done this they would have (just programming so free to them) so it leads me to believe that whatever give you this with their tune is also tied to somethign that conversely dings mpgs somewhere else in the powerband.
      2018 Atlas SEL VR6 4Motion - K&N drop-in, deAuto interior, fog, and full tail LEDs
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    9. Member Savvv's Avatar
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      07-18-2019 09:32 AM #57
      Quote Originally Posted by KarstGeo View Post
      Overall mpgs are down as the around-town mpgs dropped a bit mainly from more aggressive driving on my part
      You could have stopped right there. Improvements in the software ultimately mean the engine is making power more efficiently. In other words, if it took 100% to get 200hp, it takes less engine load to get 200hp with the tune. This is why people get better fuel economy with the tune. Your quote above is the only reason they wonít. Iíll be flashing our Atlas once something is out and report on the changes. Til then, continue with other modifications.

      Has anyone seen a change with the Wookiee Pipe?

    10. 07-18-2019 11:05 AM #58
      Did trip from GA to NJ via Mountains 900 some miles and we got 22.9 average. Not bad

    11. 07-18-2019 11:08 AM #59
      Quote Originally Posted by Savvv View Post

      Has anyone seen a change with the Wookiee Pipe?
      if you are gonna mess with the exhaust, can you please leave the mid muffler and remove the huge rear case in the back? When I did the wookie pipe, I forgot to hear how that setup would sound but I think that would sound much better as an audible mod.

    12. Member KarstGeo's Avatar
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      07-18-2019 11:50 AM #60
      Quote Originally Posted by Savvv View Post
      You could have stopped right there. Improvements in the software ultimately mean the engine is making power more efficiently. In other words, if it took 100% to get 200hp, it takes less engine load to get 200hp with the tune. This is why people get better fuel economy with the tune. Your quote above is the only reason they wonít. Iíll be flashing our Atlas once something is out and report on the changes. Til then, continue with other modifications.

      Has anyone seen a change with the Wookiee Pipe?
      I am thinking that it's unlikely that they will put out a tune for the 3.6. APR has one for the 3.6 in the older Passat. NA tunes just add v. little in my research. Will be interesting to see if someone does finally offer one.
      2018 Atlas SEL VR6 4Motion - K&N drop-in, deAuto interior, fog, and full tail LEDs
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    13. Member Veedubin02's Avatar
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      07-18-2019 11:59 AM #61
      Quote Originally Posted by KarstGeo View Post
      I am thinking that it's unlikely that they will put out a tune for the 3.6. APR has one for the 3.6 in the older Passat. NA tunes just add v. little in my research. Will be interesting to see if someone does finally offer one.
      I agree it probably wont happen, plus $600 or so for 7HP and 10lbft just isnt worth it, even with a slight increase in mileage (though you may have to run 93 with the tune)

    14. Member KarstGeo's Avatar
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      07-18-2019 03:00 PM #62
      Quote Originally Posted by Veedubin02 View Post
      I agree it probably wont happen, plus $600 or so for 7HP and 10lbft just isnt worth it, even with a slight increase in mileage (though you may have to run 93 with the tune)
      Yeah, forgot about the likely need for premium with a tune - which will financially negate any tiny bump in mpgs....out!
      2018 Atlas SEL VR6 4Motion - K&N drop-in, deAuto interior, fog, and full tail LEDs
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    15. Member Savvv's Avatar
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      07-18-2019 04:09 PM #63
      Quote Originally Posted by KarstGeo View Post
      Yeah, forgot about the likely need for premium with a tune - which will financially negate any tiny bump in mpgs....out!
      True. Iíd get tuned just because I need more power

      That being said, just because youíre tuned doesnít mean you canít run 87. Would be worth testing to see what the mpgís are with 87 on a tune. Engine will just retard timing to prevent knock etc.

    16. Member KarstGeo's Avatar
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      07-19-2019 07:32 AM #64
      Quote Originally Posted by Savvv View Post
      True. Iíd get tuned just because I need more power

      That being said, just because youíre tuned doesnít mean you canít run 87. Would be worth testing to see what the mpgís are with 87 on a tune. Engine will just retard timing to prevent knock etc.
      I was assuming the tune would be a 91-93 tune and you should then run that octane but there may be tunes for the 87 offered at some point as well. If you car is tuned for 93, you don't run 87 period.
      2018 Atlas SEL VR6 4Motion - K&N drop-in, deAuto interior, fog, and full tail LEDs
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    17. Member Savvv's Avatar
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      07-19-2019 07:59 AM #65
      Quote Originally Posted by KarstGeo View Post
      I was assuming the tune would be a 91-93 tune and you should then run that octane but there may be tunes for the 87 offered at some point as well. If you car is tuned for 93, you don't run 87 period.
      Thatís incorrect. If itís tuned for 93, it means its power figures are based on 93 and itís thus optimized for 93. What are us east coast boys to do when we take our big turbo 630cc injected cars cross country to Vegas and canít find 93 octane over there?

    18. 07-19-2019 11:18 AM #66
      anyone have a copy of performanceVW ? see if theres maybe a german company tuning this platform.

      (im starting to feel the crackhead itch to tune this thing already)

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      07-20-2019 08:46 PM #67
      My average for my two 300 mile each way (1200 miles total) trips was 25.4 mpg since I put in the higher flow filter. My last 3 tanks of gas for combined city and highway in town commuting were 23.0, 23.2 and 23.2 mpg (about 1100 miles total). I think it's pretty clear that this is a trend and not just a fluke.

      My driving habits are exactly the same pre-filter change. I use stop/start most of the time. It disengages when the AC is working hard, but I don't need AC for my morning commute. My afternoon commute mileage is worse because the AC is running and there's more traffic. I also use ACC a lot on my commute, with a custom mode setting for ECO. I shut off stop/start and ACC during really heavy traffic, and occasionally do manual shifts. This is how I've been driving since way before I changed the filter. I did okay on mileage before, but now it's much better.

    20. Member KarstGeo's Avatar
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      07-20-2019 10:35 PM #68
      Quote Originally Posted by Savvv View Post
      Thatís incorrect. If itís tuned for 93, it means its power figures are based on 93 and itís thus optimized for 93. What are us east coast boys to do when we take our big turbo 630cc injected cars cross country to Vegas and canít find 93 octane over there?
      My Uni 93 tune on my Golf is 93...not 87. Uni says 91 ok....but not 87.

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      07-21-2019 06:53 PM #69
      The easiest way to increase mpg is to increase timing. That is what most chip tuners do and why it would require premium. After that, aerodynamic aids, lowering and skinny tires. Intake mods can help slightly, exhaust mods work a bit more, but both tend to increase max power more than normal driving efficiency.
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    22. Member foofighter28's Avatar
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      09-21-2019 08:57 PM #70
      Around town my mileage is as good as my old lifted Toyota 4runner (around 16) today we took a trip up to the apple orchards and spend time up there for the day. Driving home I got this. Not bad

    23. Member Savvv's Avatar
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      09-22-2019 07:01 AM #71
      Quote Originally Posted by foofighter28 View Post
      Around town my mileage is as good as my old lifted Toyota 4runner (around 16) today we took a trip up to the apple orchards and spend time up there for the day. Driving home I got this. Not bad
      In a 4-motion VR6!?

    24. 09-22-2019 09:37 AM #72
      After I installed the lift kit, falken wildfire 265/65r18 tires and 20mm spacers, my mpg reduced to 20.x on a way I normally get 25, factoring out the inaccuracy in speed/distance calculation due to larger wheels, I probably have a 10%+ reduce in mpg

      Might try the filter later..

      Quote Originally Posted by Pnvwfun View Post
      My average for my two 300 mile each way (1200 miles total) trips was 25.4 mpg since I put in the higher flow filter. My last 3 tanks of gas for combined city and highway in town commuting were 23.0, 23.2 and 23.2 mpg (about 1100 miles total). I think it's pretty clear that this is a trend and not just a fluke.

      My driving habits are exactly the same pre-filter change. I use stop/start most of the time. It disengages when the AC is working hard, but I don't need AC for my morning commute. My afternoon commute mileage is worse because the AC is running and there's more traffic. I also use ACC a lot on my commute, with a custom mode setting for ECO. I shut off stop/start and ACC during really heavy traffic, and occasionally do manual shifts. This is how I've been driving since way before I changed the filter. I did okay on mileage before, but now it's much better.

    25. Member foofighter28's Avatar
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      09-22-2019 11:51 AM #73
      Quote Originally Posted by Savvv View Post
      In a 4-motion VR6!?
      Yes, I was surprised myself

    26. Member Savvv's Avatar
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      09-22-2019 06:15 PM #74
      Quote Originally Posted by foofighter28 View Post
      Yes, I was surprised myself
      Were you coasting in neutral down a 43 mile hill? Or being pulled by another car? Iíd love to hear how you got that high mpg.

    27. Member foofighter28's Avatar
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      09-22-2019 06:17 PM #75
      Quote Originally Posted by Savvv View Post
      Were you coasting in neutral down a 43 mile hill? Or being pulled by another car? Iíd love to hear how you got that high mpg.
      I honestly was driving between 70-80, 5-7 miles were coming down a winding road but it wasn't all 43 miles of coasting. Mind you the motor just turned over 1000 miles too on this outing

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