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Discussion Starter #1
Oldest son bought a new Highlander. Gets 27+ MPG.


Best I ever got got on my 15 is 19.87 MPG...........that really stinks.
 

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I just got 21 on a tank that was 2/3s trip to the beach with some driving while at the beach and 3 days of my commute on back roads with plenty of stop signs and lights.

I suspect I could get 23-24 if we made a Disney trip without the roof box on, maybe even 1 mpg better if I pulled the cross bars off.

Our '15 Pilot gets about the same with 30 less hp and a 5 speed auto, I have the VCM "muzzled" on it.

I think these are both pretty good numbers for 3 rows with the room these have.

What are the specs of his Highlander? Don't they still make a 4 cylinder version?
 

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Took a trip to Florida from Iowa this summer and averaged just under 27 mpg for the whole round trip. Probably would have been closer to 30 if we hadn't done so much city driving when we were in Florida. I do remember at one point flipping the DIC to show the last 450 miles average and it was 31 at one point. We do have a 2018 Traverse Redline which has the switchable AWD so the entire trip was in FWD only mode.


If the Highlander only has AWD, then those are pretty good numbers. I think a lot of companies are moving to either a switchable AWD system or some form of "intelligent" system that only engages when it needs it.
 

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Discussion Starter #4
Highlander is a 6. Will get more specific later.


Over the past year have seen mileage all over the map on different year models of these Traverse's. Engine and drive train the same.Seems strange, don't U think?



Guess its all driver related...........I "stick" the ole foot in it just about every time I'm in it. I'm a mile & 1/2 off I-20, have to get on it to go anywhere, average speed 80, speed limit 70. West of Pecos one can stick both feet in it.....BUT, why would 1 even go to Pecos in the first place, much less go West from there? Best description of Odessa: 1000 miles of beach in every direction and 5 feet from H#@@.
 

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Better question, why would one ever go to Texas??? Just kidding! At least I know where not to go now from a local...

In something this big and heavy and with that many cylinders driving style is DEFINITELY a huge contribution to variations. I live in MD but the traffic here can be so congested that you constantly have to be on the gas hard or are in stop and go traffic. I prefer not to drive that hard all the time in the Traverse but my shifts are pretty regularly at 4k or so.
 

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Discussion Starter #6 (Edited)
Not to get off topic, But am going to;.......................reading on several different threads about the 3.6 VVT engine there seems to be a whole host of "inherent problems" that are just waiting to happen if one doesn't use the right kind of oil, change soon & often, "walnut blast" the valves(whatever that is),etc.,etc.



Now, I literally came kickin & screamin into the 21 century, "vehicle wise", in May of 18 when I went from a 97 Plymouth Grand Voyager 3.3 with a 41 TE and 285k to a 15 Traverse LS 3.6vvt. Never touched the 3.3 engine; replaced every thing attached to that engine several times. Bought the thing new and changed oil/ filter every 4 to 5k, used Walmart Super Tech 10w30 and a Fram filter. "Burns' about a quart every 1200/1500 mi. Chrysler made 4 different engines,2 4's & 2 6's.for the Town & Country, Grand Caravan, & Voyager. Don't know about the 4's but the 6's were excellent.


Question; has the industry gotten so "high tech" of late with the LLT'S, VVT'S, 6,7,8,9, gear trannys that they've built themselves a nightmare?
 

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It's your topic to begin with, you have the right to take it off course if you want...

I would say that yes, the engines and drivetrain and ancillary components have become so high tech that it is much more challenging for your average joe to work on them or even diagnose them. I would say a lot of cars in the 90's hit that sweet spot, they had just enough advancement to make them super reliable with minimal maintenance (unlike say chevy small blocks that were reliable but needed constant (albeit minor) tweaking). Now engines can still be really reliable and run for 100,000 miles with minimal maintenance but when something goes wrong they are **** near impossible to work on.
 

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Discussion Starter #8 (Edited)
It's your topic to begin with, you have the right to take it off course if you want...

I would say that yes, the engines and drivetrain and ancillary components have become so high tech that it is much more challenging for your average joe to work on them or even diagnose them. I would say a lot of cars in the 90's hit that sweet spot, they had just enough advancement to make them super reliable with minimal maintenance (unlike say chevy small blocks that were reliable but needed constant (albeit minor) tweaking). Now engines can still be really reliable and run for 100,000 miles with minimal maintenance but when something goes wrong they are **** near impossible to work on.

Exactly...........case in point; as I type a response I'm looking at the 10:00 o'clock position and low & behold, there's a thread on GDI V6 VVT Actuator.....whatever the Sam Hill that it. Did look them up, there are 4, 2 intake & 2 exhaust. Thats about as far as I got.


And Also, have recently been on a timing chain thread.....Well ,went on UTube to take a look see. My beast has 2 chains & 4 gears.........guess thats where the VVT comes in......right??!

And, And, Also, have always bought the "Detroit Shop Manual" for every vehicle I've owned, but the cheapest manuals I've found are $415.00 plus shipping, and thats for a 4 volume set.



Knot quite ready yet



Just reinforced what U replied above.


Question: is Ford, Chrysler, Toyota and the other manufactors is "advanced" as GM?
 

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Exactly...........case in point; as I type a response I'm looking at the 10:00 o'clock position and low & behold, there's a thread on GDI V6 VVT Actuator.....whatever the Sam Hill that it. Did look them up, there are 4, 2 intake & 2 exhaust. Thats about as far as I got.


And Also, have recently been on a timing chain thread.....Well ,went on UTube to take a look see. My beast has 2 chains & 4 gears.........guess thats where the VVT comes in......right??!

And, And, Also, have always bought the "Detroit Shop Manual" for every vehicle I've owned, but the cheapest manuals I've found are $415.00 plus shipping, and thats for a 4 volume set.



Knot quite ready yet



Just reinforced what U replied above.


Question: is Ford, Chrysler, Toyota and the other manufactors is "advanced" as GM?
Do a search for "shop manual" at the top of the page. Someone has posted a link to a free version. Alternatively, you can access the manual at alldatadiy.com for about $20/yr. I find it's easier to use than the download version.
 

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Discussion Starter #10
Do a search for "shop manual" at the top of the page. Someone has posted a link to a free version. Alternatively, you can access the manual at alldatadiy.com for about $20/yr. I find it's easier to use than the download version.



At the very top of page?


Have used AllData several years ago. Their good, but kinda/sorta of a hassle going from the computer to the garage.


Probably wind up with them again.
 

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I have been trying to find my perfect speed for optimum MPG. Last week with a canoe on top and bike racks on the hitch I was getting 23 at 60 MPH. I usually have something on the roof on trips, once I was getting 24 and it always drops in winter now matter how slow I go.
 

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Discussion Starter #12 (Edited)
I have been trying to find my perfect speed for optimum MPG. Last week with a canoe on top and bike racks on the hitch I was getting 23 at 60 MPH. I usually have something on the roof on trips, once I was getting 24 and it always drops in winter now matter how slow I go.



What are you driving?


Down here we start our vehicles @ 60......well,maybe thats a bit of a stretch. Seriously, that is way to slow.


Canoe & bike racks? Don't think so, going on 83 I get stared at enough without them. Am seriously looking at a 16,17 or 18 High Lander....with a 6 ,got several young men $ ladies from several dealerships bugging the hound outta me by email . Never owned a "foreign" car before, if there is a "foreign" car anymore.
 

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At the very top of page?


Have used AllData several years ago. Their good, but kinda/sorta of a hassle going from the computer to the garage.


Probably wind up with them again.
No, in the forum search right above the "Recent Discussions" box at the upper right side of the page.
 

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Were low to mid 20's as well. Kind of disappointing when my v8 truck gets low 20's but has a more weight due to a frame, two more cylinders, less gears, a transfer case, etc.
 

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Just came back from St. Louis to Denver round trip with 5 adults and luggage. 3 were women so imagine my look when I see the luggage and riding pillows and blankets and such... BTW, I have 19 Traverse Premier FWD. I was checking mpgs and fuel range.

At one point I was at 30 mpg, on a flat straight a way at 79 mph. Don't know the gear but suspect 9th. Going up the mountains I saw 26 or less mpg.

Not bad with such a load. If you know I-70, full in St. Louis and refilled west of Manhattan, KS. I had a 1/4 tank or a tad less left but didn't want to hunt for gas in western KS. Another stop in Limon, CO, and again in Denver to handle rush hour.

I'll keep my Traverse.... the adults had plenty of room. Satellite Radio is a must. Average speed was 75 - 80 mph. 99.9% the highway was flat and 3 areas with a stretch of 10 miles of construction at 60 mph. Probably where I made up some mpg.
Once in the cities, 20's were the best mpg.

Keep in mind, the Traverse is bigger and heavier than the Highlander with a bigger displacement and HP/TQ.
 

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Discussion Starter #16
Well just filled up yesterday afternoon; 270.5 miles/16.402 gal.


That really stinks!


Best MPG ever only 19.87. "Apparently" the newer, IE: 18,19, Traverse's with the 9's are getting much better mileage.
 

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well I gassed up 2 days ago at $4.03- regular

I just saw $4.81 this morning. Super.



That being said- I watch my MPGs all the time.
The current tank of gas, I'm at 15.5 MPG. But its all been street stop and go.
Drive to train station---Its 5 miles with an incline and traffic lights. Cold engine. Drive takes 15 min.


But, recently took a drive from Los Angeles to San Diego/Tijuana border Airport. 288 miles roundtrip.

26 MPG.



My personnal best-- 31.3 MPG.
 

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Discussion Starter #18 (Edited)
"well I gassed up 2 days ago at $4.03- regular
I just saw $4.81 this morning. Super.
26 MPG.
My personnal best-- 31.3 "


What are U driving?



$4.03 for regular? Paid $2.22 yesterday, and thats high, been averaging bout $2.10 of late.
 

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"well I gassed up 2 days ago at $4.03- regular
I just saw $4.81 this morning. Super.
26 MPG.
My personnal best-- 31.3 "


What are U driving?



$4.03 for regular? Paid $2.22 yesterday, and thats high, been averaging bout $2.10 of late.



Im driving my 2010 Traverse-

THe station that was $4.03, this morning was $4.13....
 

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Discussion Starter #20
Well Gentlemen; It appears its all driver "related", meaning the vehicles rum from the 10 thru the 19's with mpg. 26 to 30.


My best on a 15 with 56800 is 19.87mpg.,But, down deep & up shallow, something tells me it ain't all "driver" related.


Now, I bought this vehicle in May 18 with 44000 on it. Had not had it a month and code PO455 appeared. Changed gas cap. cleared code, drove approx. 183 miles and the permanent code finally cleared. Everything going along swimmingly for about 3 month; filled up and ole PO455 pops up again. Replaced the gas cap again, cleared code etc. This time about 2 1/2 months passed, filled up and guess what, PO455 up again. Replaced gas cap one more time, cleared code.


Now, code PO455 is a "massive emission leak" which could be the charcoal box with it's related hoses, underneath this beast.


Don't wanna jack this thing up, fall down on the concrete and crawl under it. Just hurts to much next several days.


Could have an effect on MPG.......right?.....maybe thats a bit of a stretch.....................Thoughts?
 
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