C'mon guys and gals, we're all dying to hear some real world MPG's!!!! - Page 99 - Smart Car Forums
User Tag List

 14Likes
Reply
 
LinkBack Thread Tools Display Modes
post #981 of 990 (permalink) Old 01-04-2019, 11:53 AM
SCOA Club
 
Mister_smart_LA's Avatar
 
Join Date: Jun 2013
Location: smart center West Covina/L.A.
Posts: 2,297
Thanks: 199
Thanked 541 Times in 395 Posts
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 627 Post(s)
The first thousand or so miles in my 2017 smart fortwo BRABUS cabriolet, I only averaged between 23 and 32 mpg's. I realized it's because I couldn't stop racing in it.


I got most of that out of my system and now I drive the way I'm legally supposed to, so I have managed to get upwards of 45 mpg's rather easily as long as I'm willing to allow most traffic pass me because I'm "only" traveling at the speed limit. The key is to avoid aggressive acceleration too, avoiding turbo spooling when unnecessary.



So the engine advancements of the 453 compared to the 451 is night and day, as the 453 is the superior engine design... and that's not a dig at the older 451, which I still drive as well.
Mister_smart_LA is offline  
Sponsored Links
Advertisement
 
post #982 of 990 (permalink) Old 01-04-2019, 12:27 PM
 
Join Date: Dec 2018
Posts: 31
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
What’s the point of a turbo engine if we can’t zoom past everyone hehe
jwight likes this.
Dearcybara is offline  
post #983 of 990 (permalink) Old 01-04-2019, 03:51 PM
SCOA Club
 
Mister_smart_LA's Avatar
 
Join Date: Jun 2013
Location: smart center West Covina/L.A.
Posts: 2,297
Thanks: 199
Thanked 541 Times in 395 Posts
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 627 Post(s)
Quote:
Originally Posted by Dearcybara View Post
What’s the point of a turbo engine if we can’t zoom past everyone hehe

Gaining the ability to develop the power of larger engines without consuming more fuel at lower speeds, at idle, etc,. Efficiency is as important as speed in that regard...
Mister_smart_LA is offline  
Sponsored Links
Advertisement
 
post #984 of 990 (permalink) Old 01-04-2019, 11:17 PM
 
Join Date: Apr 2017
Location: Redmond, WA
Posts: 897
Thanks: 25
Thanked 83 Times in 68 Posts
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 286 Post(s)
Quote:
Originally Posted by jimvw57 View Post
How many miles on the odometer?? The 451 models took until around 30,000 miles to get great mileage. Synthetic oil only makes it worse until the motor wears in. Synthetic oil doesn't allow them to wear in, some have switched to regular oil for 10K-20K miles to get things seated properly.
The majority of engine break-in only takes the first few revolutions the engine makes, and with the proper procedure of running to higher RPMs and allowing engine braking to slow the car down, is virtually completed within the first 100 miles, regardless of which oil is in the engine.

Many high end manufacturers such as Ferrari, Mercedes, and even Chevy in the Corvette, deliver the car with synthetic oils as the factory fill. If this weren't acceptable to break in an engine, then they wouldn't do this.
InjuredAgain is offline  
post #985 of 990 (permalink) Old 01-05-2019, 11:38 AM
Super Moderator
SCOA Club
 
jimvw57's Avatar
 
Join Date: Sep 2008
Location: southern Minnesota
Posts: 10,960
Thanks: 302
Thanked 1,947 Times in 1,330 Posts
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 768 Post(s)
Garage
Well going by personal experience, the first 30K miles I averaged 38 MPG, after that it slowly increased to 42-48 MPG That was with recommended oil changes and easy driving. Not the only smart I heard that with
jimvw57 is offline  
post #986 of 990 (permalink) Old 01-05-2019, 03:00 PM
 
Join Date: Apr 2017
Location: Redmond, WA
Posts: 897
Thanks: 25
Thanked 83 Times in 68 Posts
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 286 Post(s)
Quote:
Originally Posted by jimvw57 View Post
Well going by personal experience, the first 30K miles I averaged 38 MPG, after that it slowly increased to 42-48 MPG That was with recommended oil changes and easy driving. Not the only smart I heard that with
That's a very common experience among new car owners. I believe there are many factors, but the actual engine break-in isn't one of them.

But first, the engine break-in part. I own a Corvette and many owners say the engine doesn't break in for 20-30k miles. That was debunked pretty clearly years ago by someone who had opened up their engine with about 200 miles on it and did a microscopic examination of the cylinder bores, posting detailed and high resolution pictures, and then repeating the process about 10k miles in (unfortunately after a valve failure). There weren't any visible differences down to a resolution of a few microns. He tried to photo the same location in the same cylinder. Of course, there could have been other factors, such as a low spot in either the cylinder bore or the rings in that location, but the overall sheen of the cylinder bores looked the same as far as everyone could tell.

There's also articles like this recent one:

How to Break-In An Engine

which when talking about engine break-in and seating of rings, says:

With today’s rings, especially moly-faced versions, this can be achieved in a very short period of time and certainly within 20 to 30 miles of street driving. In WOT dyno testing, likely the rings are seated by the end of the first few runs.

As far as what causes fuel economy to go up over time, a lot of it is due to wear, especially in surfaces that mechanically mate under pressure like gears, and in seals. Also, as tires get worn, their rolling diameter decreases so the odometer becomes a bit optimistic, and tires get harder as well which decreases rolling resistance. Probably the main factor is that people either just stop enjoying the performance of their new car as much, or they get more used to driving it in a way that maximizes economy. After all, how many people do you know that complain about how the transmission in the 451 works, fighting it when they first get the car, but after a while they learn how to drive it more smoothly and efficiently? And I know from direct evidence that I don't drive my ED nor my Corvette nearly as hard as when they were new, and economy/efficiency have gone up in both cases.
InjuredAgain is offline  
post #987 of 990 (permalink) Old 01-05-2019, 07:10 PM
Super Moderator
SCOA Club
 
jimvw57's Avatar
 
Join Date: Sep 2008
Location: southern Minnesota
Posts: 10,960
Thanks: 302
Thanked 1,947 Times in 1,330 Posts
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 768 Post(s)
Garage
It's good to know you have all the answers as to how I drive my car and how my particular vehicle is wearing internally.

I drive my car on the same road, to and from work daily, every working day year round. As such, there is little variations in the external effects except weather and temps which is why I use an average MPG over the life of the car. for the first 165K miles, I regularly tracked MPG on each tank. and averaged 4 or 5 tanks to get a running average.

At around 35K miles I did replace tires on my smart with absolutely no change in MPG as I used the same size and brand that came with the car. At the time, that was the only brand available in the stock sizes. so rolling resistance wasn't a factor. (same rolling resistance spec on the new tires as the old ones)

I can't give you a microscopic evaluations of the individual components, I did not have the oil analyzed at each oil change, or do a complete teardown every year to inspect for wear on seals and gears. Come on! its a daily driver and no way near the cost of a Corvette or exotic vehicle. Just a general idea of what I have seen, Real World (as the thread title says.)

In the end, if we discount any sort of mechanical wear-in, the only answer is magic.

While you are analyzing all the data from the various experts who constantly contradict each other, I will be out for a cruise in my smart! Happy motoring!!
jimvw57 is offline  
post #988 of 990 (permalink) Old 01-06-2019, 12:35 AM
 
Join Date: Apr 2017
Location: Redmond, WA
Posts: 897
Thanks: 25
Thanked 83 Times in 68 Posts
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 286 Post(s)
I thought this was a discussion forum. It sounds like you don't want to discuss and would rather be sarcastic. Have it your way, but your response says way more about you than it does about me.
InjuredAgain is offline  
post #989 of 990 (permalink) Old 01-06-2019, 06:48 AM
Super Moderator
SCOA Club
 
jimvw57's Avatar
 
Join Date: Sep 2008
Location: southern Minnesota
Posts: 10,960
Thanks: 302
Thanked 1,947 Times in 1,330 Posts
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 768 Post(s)
Garage
As does yours. End of discussion.
jimvw57 is offline  
post #990 of 990 (permalink) Old 01-08-2019, 04:58 PM
 
thecoinbox's Avatar
 
Join Date: Aug 2012
Location: Pittsburgh
Posts: 64
Thanks: 0
Thanked 15 Times in 12 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
My 2015 Pure has 21k and getting good mpg is no problem. Local local driving 34. Mixed local/city 38. Short highway 42-44 and long distance 49. The wife once got 52 on a trip. I have a Scanguage and live in hilly Pennsylvania.
jimvw57 likes this.
thecoinbox is offline  
The Following User Says Thank You to thecoinbox For This Useful Post:
Doug Stine (02-09-2019)
Reply

Tags
miles per gallon , mpg

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Smart Car Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



  LinkBacks (?)
LinkBack to this Thread: https://www.smartcarofamerica.com/forums/f130/c-mon-guys-gals-we-re-all-dying-hear-some-real-world-mpg-s-2626/
Posted By For Type Date
Outside Asylum - This thread Refback 11-10-2008 07:26 PM

Similar Threads
Thread Thread Starter Forum Replies Last Post
Welcome to the Smart World! 1of2ForTwo New Members Area 10 05-10-2010 06:44 AM
Anyone hear of the Zenn car? Willy The Car Lounge 18 10-07-2008 08:25 AM
Smart fortwo is a real car with real-car faults - San Mateo Daily Journal 12/28/2007 spdickey smart News & Rumors 25 02-29-2008 09:31 AM
smart somewhere in the world spdickey smart Videos 2 11-16-2007 06:49 PM
Did Ja' Hear It? Old smart smart News & Rumors 12 11-15-2007 12:14 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome
 

Clubs, Garage Plus vBulletin Plugins by Drive Thru Online, Inc.