Advertise on Bikeforums.net



User Tag List

Page 2 of 3 FirstFirst 123 LastLast
Results 26 to 50 of 61
  1. #26
    Super Moderator Allen's Avatar
    Join Date
    Sep 2005
    Location
    Atomic batteries to power; turbines to speed
    My Bikes
    Salsa La Raza, Panasonic Electric, Bria, Bamboo touring, Bamboo cargo
    Posts
    4,682
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    In Ga 55mph is impeding traffic.
    Quote Originally Posted by unterhausen
    I believe that in this case "solid meh" means "so 'meh' that it could never be anything more than 'meh', and yet also no less than 'meh' -- in a word, exactly 'meh'"

  2. #27
    Legs of Steel chrisvu05's Avatar
    Join Date
    Jun 2005
    Location
    On my bike
    My Bikes
    Pegoretti Marcelo, Cannondale six13
    Posts
    1,826
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I can't believe it hasn't been said......

    I CAN'T DRIVE FIFTY-FIVE!!! (yelled in rocker voice of Sammy Hagar)

  3. #28
    tired donnamb's Avatar
    Join Date
    Apr 2006
    Location
    Portland, OR
    My Bikes
    Breezer Uptown 8, U frame
    Posts
    5,660
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by wyeast View Post
    Not much around here where you can drive faster than 60 w/o risking a ticket.
    You say that like it's a bad thing.
    "Real wars of words are harder to win. They require thought, insight, precision, articulation, knowledge, and experience. They require the humility to admit when you are wrong. They recognize that the dialectic is not about making us look at you, but about us all looking together for the truth."

  4. #29
    Banned. timmyquest's Avatar
    Join Date
    May 2005
    Location
    Woodstock
    Posts
    5,761
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by JoelS View Post
    Driving slower may not help your gas mileage. It depends on how your particular car is tuned. Many get their best mileage at 65 or 70.

    Just like when you're pedaling (optimum gear/cadence for you), there is an optimum efficient speed for your car.
    Considering most cars shift into overdrive well before 55 and considering wind is greater at speed...i'm gonna disagree with this here now there um now here there

  5. #30
    cyclopath
    Join Date
    Mar 2008
    Location
    NY
    Posts
    149
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    My wife's Volvo wagon gets it's best mileage(33 mpg) at or a little over 65 mph. My 6cyl/5spd F150 gets it's best mileage(23mpg) between 52 and 55 mph.

    I like doing 52 mph on the Sawmill River Parkway(I-87). I single handedly piss off more motorists in one day than a hundred Critical Mass-holes can piss off in a whole year

  6. #31
    WTF is that smell? crackerjab's Avatar
    Join Date
    Dec 2005
    Location
    Charlotte, NC
    Posts
    449
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by JoelS View Post
    Driving slower may not help your gas mileage. It depends on how your particular car is tuned. Many get their best mileage at 65 or 70.

    Just like when you're pedaling (optimum gear/cadence for you), there is an optimum efficient speed for your car.
    +1

    I drive 4000+ miles a month in various rental cars. A lot of these cars have real time mpg indicators. We'll call it an ongoing experiment of mine. Some of these cars get their better mpg at 72mph than they do at 55mph. Some of them get better mpg at 85mph than 35mph. That being said, it's the opposite with other cars. Different cars are efficient at different speeds and different conditions. But as general rule of thumb, I drive 95mph on low congestion interstates. And 90mph in when going through GA so I don't get ran over.

    Another fun thing to do is find other drivers going as fast as you and take turns drafting. You'd be surprised the difference in fuel economy.

  7. #32
    Downhill Racer PhilThee's Avatar
    Join Date
    Jan 2006
    My Bikes
    1994 Bridgestone RB1, 2006 Cannondale R1000, 2007 Cannondale Caad9 Optimo2
    Posts
    756
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by x136 View Post
    and since Californians are completely clueless of the "keep right except to pass" concept, trying to drive faster is just an exercise in stress and frustration anyway.

    You aren't alone there. It's the same in Oregon.

    If I'm in a gas saving mood I drive just fast enough so that no Semi's pass me. That's just irritating.

    I don't know if this saves me any gas though because I eventually get trapped behind someone who doesn't know how to drive at a steady speed

    60-62-55-70 MAKE UP YOUR MIND FOR CHRISTS SAKE!!!!!!!!
    "I didn't see him/her" is a confession, not an excuse.

  8. #33
    WTF is that smell? crackerjab's Avatar
    Join Date
    Dec 2005
    Location
    Charlotte, NC
    Posts
    449
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by timmyquest View Post
    Considering most cars shift into overdrive well before 55 and considering wind is greater at speed...i'm gonna disagree with this here now there um now here there
    So are you saying that your because your car shifts into OD at say, 40mph, that is your optimum speed for the best mpg?

    It's using more power when it first shift into overdrive.

  9. #34
    WTF is that smell? crackerjab's Avatar
    Join Date
    Dec 2005
    Location
    Charlotte, NC
    Posts
    449
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by PhilThee View Post
    You aren't alone there. It's the same in Oregon.

    If I'm in a gas saving mood I drive just fast enough so that no Semi's pass me. That's just irritating.

    I don't know if this saves me any gas though because I eventually get trapped behind someone who doesn't know how to drive at a steady speed

    60-62-55-70 MAKE UP YOUR MIND FOR CHRISTS SAKE!!!!!!!!
    That drives me absolutely crazy when people do that. My favorite is when they pass you, then slow down, then you pass them (because you're at the same rate of speed), then they speed up again, and the cycle continues.

  10. #35
    Downhill Racer PhilThee's Avatar
    Join Date
    Jan 2006
    My Bikes
    1994 Bridgestone RB1, 2006 Cannondale R1000, 2007 Cannondale Caad9 Optimo2
    Posts
    756
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Wordbiker View Post
    I drive 55 because the guy in front of me can't see the limit sign that clearly says 65MPH and won't pull over for faster traffic.
    The answer is a simple one.

    He's in the middle or far left lane because,

    He's not driving a Semi Truck so he's doing the right thing while costing everyone else mpg because they have to slow down for him and then get back on the gas.

    He's on the phone and can't be bothered with the rules of the road at this time?

    He's clueless and has been since birth?

    Maybe this should be a pole
    "I didn't see him/her" is a confession, not an excuse.

  11. #36
    Downhill Racer PhilThee's Avatar
    Join Date
    Jan 2006
    My Bikes
    1994 Bridgestone RB1, 2006 Cannondale R1000, 2007 Cannondale Caad9 Optimo2
    Posts
    756
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by crackerjab View Post
    That drives me absolutely crazy when people do that. My favorite is when they pass you, then slow down, then you pass them (because you're at the same rate of speed), then they speed up again, and the cycle continues.
    EXACTLY what I'm talking about!

    I usually end up kicking up the speed for a few miles then slowing down to where I was.
    Do I save gas with that move, well no.
    But I do save my piece of mind.
    Last edited by PhilThee; 07-12-08 at 01:58 PM.
    "I didn't see him/her" is a confession, not an excuse.

  12. #37
    la vache fantôme phantomcow2's Avatar
    Join Date
    Aug 2004
    Location
    NH
    Posts
    6,266
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    No I don't do 55; I'd be ostracized from the road if I did that. I find anywhere from 60-65 to be a fair compromise, and I do get very good fuel economy in this range. My car starts to shake past 65 anyways.
    C://dos
    C://dos.run
    run.dos.run

  13. #38
    Banned. timmyquest's Avatar
    Join Date
    May 2005
    Location
    Woodstock
    Posts
    5,761
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by crackerjab View Post
    So are you saying that your because your car shifts into OD at say, 40mph, that is your optimum speed for the best mpg?

    It's using more power when it first shift into overdrive.
    I'm saying that in a given gear it takes more throttle to go faster. More throttle means more gas.

  14. #39
    The Truth Ih8lucky13's Avatar
    Join Date
    Apr 2006
    Location
    Miami
    My Bikes
    Felt f4c, Felt RXC, Guerciotti Khaybar,Guerciotti EM-2, Cervelo P-3.
    Posts
    2,291
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    My time is way too valuable to worry about saving a few pennies to slow down.

  15. #40
    Bourbon junkie ricebowl's Avatar
    Join Date
    Aug 2007
    Location
    NorCal
    Posts
    652
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    hell no...65-80.
    Quote Originally Posted by Digital_Cowboy View Post
    Show me just one law that says that a person has a right to exercise their judgement or common sense, just one.

  16. #41
    Cries on hills supton's Avatar
    Join Date
    Jun 2007
    Location
    Central NH
    My Bikes
    2007 Trek Pilot 1.2, 1995 Gary Fisher Avantage, 1985 Panasonic Sport 1000, 1969 Raleigh Sprite 5
    Posts
    873
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Unfortunately, 2/3's of my annual milage comes from commuting back and forth to work. So, I've tried to slow down, driving maybe 5mph under. Gets me that last 10% in FE, bumps it up to 50 or so. I gave in and bought a Scangauge, partially so I could read problem codes (if and when they pop up) but mostly 'cuz I really wanted to see what kind of mpg I was getting, real time.

    That said, with the family loaded up, I sometimes will go whatever speed it takes to hold the left lane. If that gets too fast for me (typically 90mph or 25 over, whichever comes first), I'll move over another lane. But the real crazies seem to live in the right(er) lanes. Speed up/slow down sorts, the guys who can't be bothered to slow down and would pass you in the ditch at 50 over, people who can't merge--by driving fast enough to hold the left lane (or middle one), I find my blood pressure stays lower. Plus, with the kids, I have plenty of encouragement to make 3+ hour trips shorter by any means.
    '07 Trek Pilot 1.2
    '85 Panasonic Sport 1000 (beater, gone now)
    '69 Raleigh Sprite 5 speed (AW instead of S5, for now)

  17. #42
    Cries on hills supton's Avatar
    Join Date
    Jun 2007
    Location
    Central NH
    My Bikes
    2007 Trek Pilot 1.2, 1995 Gary Fisher Avantage, 1985 Panasonic Sport 1000, 1969 Raleigh Sprite 5
    Posts
    873
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by crackerjab View Post
    I drive 4000+ miles a month in various rental cars. A lot of these cars have real time mpg indicators. We'll call it an ongoing experiment of mine. Some of these cars get their better mpg at 72mph than they do at 55mph. Some of them get better mpg at 85mph than 35mph.
    I find that hard to believe. Wind resistance goes up as the square of speed. I could believe 65mph would get more mpg's than 35, if only because of being in top-gear -- but not 85 vs 35. Are you sure you're not comparing instantaneous mpg readout? Accelerating at 35 would burn more gas than maintaining speed at 85, no doubt.

    Question: given 4k/month in driving time, you probably have to fill up any particular car a few times, no? Have you compared the calculated by hand method vs whatever the cars computer thinks it got for the tank? I've heard many complaints (all the web, granted) that those real time readouts are pretty optimistic--but that they have gotten much better in recent years.
    '07 Trek Pilot 1.2
    '85 Panasonic Sport 1000 (beater, gone now)
    '69 Raleigh Sprite 5 speed (AW instead of S5, for now)

  18. #43
    WTF is that smell? crackerjab's Avatar
    Join Date
    Dec 2005
    Location
    Charlotte, NC
    Posts
    449
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by supton View Post
    I find that hard to believe. Wind resistance goes up as the square of speed. I could believe 65mph would get more mpg's than 35, if only because of being in top-gear -- but not 85 vs 35. Are you sure you're not comparing instantaneous mpg readout? Accelerating at 35 would burn more gas than maintaining speed at 85, no doubt.

    Question: given 4k/month in driving time, you probably have to fill up any particular car a few times, no? Have you compared the calculated by hand method vs whatever the cars computer thinks it got for the tank? I've heard many complaints (all the web, granted) that those real time readouts are pretty optimistic--but that they have gotten much better in recent years.
    The 85 versus 35 making a point about the differences in different vehicles. And those mpg indicator are not always entirely accurate. Close but not always. And yeah I get actual results when filling by how much gas vs how many miles driven give or take a quarter gallon. Mostly what I'm getting at here is that some cars can be more efficient at speeds in the 65 70 range versus the 55 mark.

  19. #44
    Banned
    Join Date
    Mar 2004
    Location
    Maryland
    My Bikes
    rockhopper, delta V, cannondale H300, Marin Mill Valley
    Posts
    5,155
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I have always driven at or below the posted limit. This thread has inspired me to drive at or below 90% of the maximum legal speed from now on, to stay ahead of the trend. I believe in setting a good example for those less intelligent than myself.

  20. #45
    Pwnerer Wordbiker's Avatar
    Join Date
    Jun 2005
    Location
    Pagosa Springs, CO, USA
    My Bikes
    Road, MTB, Cruiser, Chopper, BMX
    Posts
    2,878
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by qmsdc15 View Post
    I believe in setting a good example for those less intelligent than myself.
    Yes, but will he notice?
    Quote Originally Posted by ahsposo View Post
    Ski, bike and wish I was gay.

  21. #46
    Back in black cydewaze's Avatar
    Join Date
    May 2005
    Location
    Maryland
    My Bikes
    Trek OCLV, Scattante XLR, Jamis Dakar Expert, Alpinestars Al-Mega, Trek 9700
    Posts
    4,242
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by supton View Post
    I find that hard to believe. Wind resistance goes up as the square of speed. I could believe 65mph would get more mpg's than 35, if only because of being in top-gear -- but not 85 vs 35. Are you sure you're not comparing instantaneous mpg readout? Accelerating at 35 would burn more gas than maintaining speed at 85, no doubt.
    While I can't vouch for anyone else's car, I had a similar experience with my old 95 Camaro. The car had a 6-sp manual transmission with a 0.5:1 ratio. I had also changed the wheels/tires, and the new ones were a bit taller than stock.

    At 55mph, RPM in 6th gear was around 900 - way too low for efficient running. Any uphill grade, even a slight one, would cause the car to buck, lurch, and foul plugs. So 55mph meant 5th gear and much higher RPM. Increasing speed to 65-70 would get you around 1500-1800 in 6th gear, which gave me much better economy than 55mph in 5th. I even managed to pull 30mpg on one trip, with the AC blasting and a few occasional blasts of the throttle while accelerating on on-ramps. Not bad for a 5.7 liter V8.

  22. #47
    Banned. timmyquest's Avatar
    Join Date
    May 2005
    Location
    Woodstock
    Posts
    5,761
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by crackerjab View Post
    The 85 versus 35 making a point about the differences in different vehicles. And those mpg indicator are not always entirely accurate. Close but not always. And yeah I get actual results when filling by how much gas vs how many miles driven give or take a quarter gallon. Mostly what I'm getting at here is that some cars can be more efficient at speeds in the 65 70 range versus the 55 mark.
    It is accurate but as mentioned, going forward from a stop =/= cruising at Xmph

  23. #48
    Banned. timmyquest's Avatar
    Join Date
    May 2005
    Location
    Woodstock
    Posts
    5,761
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by cydewaze View Post
    While I can't vouch for anyone else's car, I had a similar experience with my old 95 Camaro. The car had a 6-sp manual transmission with a 0.5:1 ratio. I had also changed the wheels/tires, and the new ones were a bit taller than stock.

    At 55mph, RPM in 6th gear was around 900 - way too low for efficient running. Any uphill grade, even a slight one, would cause the car to buck, lurch, and foul plugs. So 55mph meant 5th gear and much higher RPM. Increasing speed to 65-70 would get you around 1500-1800 in 6th gear, which gave me much better economy than 55mph in 5th. I even managed to pull 30mpg on one trip, with the AC blasting and a few occasional blasts of the throttle while accelerating on on-ramps. Not bad for a 5.7 liter V8.
    Just because you don't know how to drive a stick shift doesn't mean that the car is more efficient at 65mph...

  24. #49
    Non Tribuo Anus Rodentum and off to the next adventure (RIP) Stacey's Avatar
    Join Date
    Dec 2002
    Posts
    9,163
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by crackerjab View Post
    Another fun thing to do is find other drivers going as fast as you and take turns drafting. You'd be surprised the difference in fuel economy.
    That's just sheer lunacy.

    Did you ever integrate the 'what if' variable on to your calculations?

  25. #50
    Member Mike R.'s Avatar
    Join Date
    Jul 2008
    Location
    West Trenton, NJ
    Posts
    31
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by veggie_lover View Post
    I have learned from cycling that you can move well below the speed limit, and not be a hindrance to traffic or compromise your safety. So with high gas prices I have taken to driving 55 on interstates since my car gets 15% better gas mileage compared to going 70. I found this site has a useful calculator to determine your savings per hour by driving slower. Anyone else driving slower because of high gas prices?

    Depends on the car actually.

    My current car (Audi A4 2.0T Quattro) likes 65 mph in 5th for the best gas mileage. Drop it to 6th and it suffers. In 4th, same thing. 5th/65mph works best on the highway for me.

    My old car (Porsche Bosxter) liked 4th gear at about 110mph. Well...that's a lie....I liked it, gas be damned in that car! LOL.

Page 2 of 3 FirstFirst 123 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •