getakey

Good observations. I travel on a 130 mile trip twice every week so I have had much experience with ACC and LKAS. I like ACC, but while I appreciate what LKAS can do, it does not really do much for me. I find the constant correction not to my liking.
That 60 to 70 range is the sweet spot for mpg. The wind drag increases as the square of the velocity, so > 70 things go down fast. For example, drag is (70*70)/(60*60) more at 70 than 60.

TampaRLX-SH

Is that due to feeling the corrections made while holding the steering wheel? I can understand that growing old, or even feeling like you are fighting the car's direction, somewhat like driving with a misalignment. For now, I like it because it reads to me that the feature is doing it's job. It also made me realize how much I may drift in the lane when driving without.

getakey

yeah the corrections while holding the wheel. Had to read that several times before realizing you were not saying it was because I was getting old. Or were you

TampaRLX-SH

LOL. I did not realize my choice of words would have been interpreted that way. 'Growing old' meaning wearing on your nerves! But both are true when you are an old fart.

getakey

so I turned on LKAS on my 130 mile trips this week. Not as annoying as I previously thought. However, I just don't see the value add. You have to keep your hands on the wheel or engage your hands on the wheel frequently. I find taking my hands on/off/on not relaxing and if I keep my hands on the wheel, I might as well steer the car. If it was full autosteer as Tesla has, that would be different.

George Knighton

The derogation of LKAS I find interesting, because I've always perceived that the combination of LKAS and ACC allows me to drive further distances and arrive at the destination feeling much better than before.

I wonder what we do differently, or how our drives are different.

getakey

ACC helps a lot. Are you driving with a lot of traffic? My trip is mostly 4 lane highway with moderate traffic

hondamore

I think the benefit of LKAS is most felt if you have something distracting you while driving on the highway. For example, if you have a car full of people and you are distracted by the interaction of your passengers. That is, if you are telling a joke or a story or listening to a joke or a story while driving and become distracted enough to lose complete focus on your driving, the LKAS keeps you centered in your lane when you might otherwise have wandered a bit because of the distraction. The same can be said if you become distracted by a telephone call or by grabbing yourself a snack or something to drink on a long highway trip. On long trips, the mind wanders and the ACC and LKAS are there as a backup so you don't always have to have 100% focus on the road.

I personally have done very little highway driving with my RLX, but during my limited experience with the ACC and LKAS, I found both very helpful as a "second set of eyes" that allow you to be more relaxed as you drive.

George Knighton

Yes. Very frequently in rush hour and the speeds will vary from 20 mph to 65 mph.

This can be nerve wracking without ACC/LKAS.

fsmith

I find LKAS useful on wide multi-lane highways where it's pretty easy to drift, especially around turns, if you aren't paying full attention (as Hondamore notes). That little tug on the wheel is just right to get me to pull back into lane.

LKAS and ACC, plus auto-brake, are, of course, the same basic functions as in Tesla's autopilot. Autopilot is just three or four (or maybe five or more) years/iterations beyond our cars' functions. They also get to train their system by recording millions of miles of owners' driving. I think of LKAS and ACC as a kind of sampling of autonomous things to come.

moose66

This is also what keeps our cars off of the Consumer Reports warning list. They have strong safety concerns for any car with advanced auto-drive (autonomous) features.

neuronbob

ACC/LKAS rock in this car. They help me to keep my eyes on the road in rush hour traffic. They take so much of the drudgery out of soul-crushing rush hour traffic.

I won't buy another daily driver without this tech.

I say this, loving to drive sports cars and other cars that allow me to have the visceral sensation of driving. In this car, I can turn off all the nannies and just drive the car...another important feature for me.

wstr75

Same trip from home to destination and then back home again. Approx. 26.7 miles each way with about six miles in city and 21 miles Interstate on a 70 degree day with not much wind. Outbound trip was due north and return trip obviously due south. Hybrid does well in city driving and has essentially the same fuel usage at highway speeds as my former 2014 RLX PAWS.

bazoulay

Not convinced on my fuel economy on my new RLX Sport Hybrid after 2 tank fill ups. Car is brand new and so far average 10.8 L/100km and do 450-500km for each tank which is far from the advertising 8L/100km. Not sure how to compare this with the MPG threads on this forum. Any Canadian owners who are able to compare with me on fuel economy? How many tanks does it take for the car to improve in fuel efficiency?

horseshoez

iTrader: (2)

Most engines take at least 30,000 kilometers before they are fully broken in to the point where peak fuel economy is achieved; that said, my wife and I bought a new vehicle back in 1998 and its fuel economy continued to improve for years; it finally peaked out in 2007 after almost 300,000 kilometers.

neuronbob

I merged bazoulay's thread with the fuel economy thread because it has the answer he seeks.

hondamore

Canadian owner here...With the right driving style, I achieve 7 to 7.5 l/100km average all city driving on a tankful of summer gas in my Sport Hybrid. When I'm having fun in Sport mode or when I'm making a lot of short trips, I get around 8 to 8.5 l/100km.

As others have mentioned, your mileage will improve as the car gets broken in, but I find the biggest factors to getting better mileage are driving style and the length of trips you are taking. Obviously, if you have a "heavy right foot", your mileage will suffer. One possible solution for this is to adjust the accelerator pedal so you "lighten your right foot". Also, if you make short trips where you are starting the car frequently, your mileage will suffer because the system won't enter EV mode until the engine gets up to temperature and without EV mode, you won't get the kind of mileage the car is capable of.

As neuronbob mentioned, this thread is full of great discussions of the reasons your mileage might not be up to the numbers achieved by others.

Keep us posted on how your mileage numbers do in the future bazoulay. Good luck and have fun.

getakey

i get 750 ml/day

hondamore

I forgot to add to my earlier post for bazoulay that my limited highway driving resulted in mileage of 7.4 l/100km with 3 passengers and a trunk full of luggage etc. average speed just under 120 km/h. For our American friends, that's 31.8 mpg averaging about 74 mph.

RLX-Sport Hybrid

My RLX SH measurement is holding at 32.7 mpg average with 316 miles traveled so far and 228 miles to empty on the current tank when I turned it off this morning. That is with mixed driving but primarily driven in the 40-75 mph range on most roads. I find if I am driving all highway, I see 31-32 mpg and all purely local can be in the 34-39 mpg range or higher. I have seen extremes in both of my sport hybrids that are nutty like 50-60 mpg or more but those are for short distances of 3-4 miles and with specific circumstances. It is fun to be a mpg geek!

RLX-Sport Hybrid

So for the MDX Sport Hybrid at 15,000 miles the average for the period is 26.7 mpg including the winter time reductions of efficiency at about 25 mpg during that season, but in the late spring/summer/fall seasons 32-38+ mpg for 50-70 mph sessions are very normal to see. I just completed a 200 mile journey 50-50 highway-local and saw 34.7 mpg, and the range to empty is at 445 mi . Very impressive for a sport utility. Amazing actually.

neuronbob

REALLY impressive from the MDX-SH. How many miles does the Blackbird have on it, now?

RLX-Sport Hybrid

69,000 miles. Got a compliment yesterday from someone who thought it looked like a brand new car because of how I take care of it. He was shocked it had the miles on it that it does. Takes lot of work to keep it up.

KeithL

Sow wit 69K on your Sport Hybrid I assume you are still loving it? Any thoughts or reflections?

RLX-Sport Hybrid

Honestly I really still love driving it. You know when it is in eco mode, and I'm accelerating almost in steps it is just fun. What I mean by that is adding more throttle in steps so I can feel the torque in stages and I'm simply accelerate faster and faster heading up through the gears into jail speeds, that just does not get old. I have every intention of keeping this car for many years to come, well past 100k. I don't think I will ever need to change the brakes even once as the pads are still measuring out as just about new at 69k. Amazing!

Now I don't think I will feel differently about it next year when the monster arrives as the cars are two completely different animals, but the 2019 CTSV will be an absolute blast and I can't wait. Should be a ton of fun.

My wife and I are about to head out on a whirlwind 5 star Caribbean tour of several islands so that is our treat for the summer. It is fun to do things like that. And when we get back home the sport hybrids will be there waiting for us.