2007 Yaris Sedan Automatic current 50 US MPG tank streak

Discussion in 'Toyota' started by voodoo22, Sep 18, 2008.

  1. voodoo22

    voodoo22 Cheaper than the bus

    Thanks Hadi.

    Your avatar... I can't look away. I feel like it's casting some sort form of control over me.
  2. voodoo22

    voodoo22 Cheaper than the bus

    I was surprised to get another 50+ mpg tank on the last fill even though the weather was atrocious in every way and I put winter tires on a little over halfway through the tank. Surprisingly may have a chance to get another 50+ mpg with the current tank with a warm blast of weather coming tomorrow (even though this morning was an ice rain deluge) and nearly halfway there already. This would be my first ever 50+ mpg tank with winter tires on for the entire tank. So far, I can't recommend these Nokian rsi tires enough.
  3. voodoo22

    voodoo22 Cheaper than the bus

    A lot of whacky factors contributed to me getting my best tank of gas yet... and I achieved expert status to boot. That's been a lot of hard work to get to.

    Factors Against:

    cold morning weather
    winter tires on

    Factors For:

    only 2 short trips, the rest of the tank was all commute or highway driving on a shortish weekend trip which spanned just over 300 kms.
    unusual blast of warm afternoon weather
    no traffic jams
    Oil change halfway through the tank where I got a new air filter

    Somehow this combination equals

    882.8 kms using 37.916 litres
    4.29 l/100km

    I don't think I will be easily beat this mark. That shows how much of a difference those little trips make as in much better weather with all season tires, my previous best was 53.7mpg.
    Last edited: Nov 7, 2008
  4. AlphabetBackward


    Your car is only 5 MPG more than my car assuming freeway and you're getting 15 more than me. Amazing.
  5. xcel

    xcel PZEV, there's nothing like it :) Staff Member

    Hi Voodoo22:

    ___The cool thing is I doubt you will see under 40 even though winter. Nice job on the last tank indeed!

    ___EPA? What’s EPA :D

    ___Good Luck

  6. voodoo22

    voodoo22 Cheaper than the bus

    Thanks Guys. I am excited to see how high I can keep my mpg this winter since I am driving more disciplined than last year. It seems I'm slowly going completely over to the green side and soon I will begin to refer to Wayne as my master :)

    One guy I was talking to from Arizona thought I was recording my MPG in Imperial units, because it was so much higher than his totals :eek:
  7. bobm33

    bobm33 Member

    wow that is incredible. my new yaris with manual transmission only gets 40 mpg but then again i'm new to this!!! what's your best secret?

  8. voodoo22

    voodoo22 Cheaper than the bus

    I don't have any secrets, but I think the two most important things I do is do not go over 55mph unless getting the speed is free coasting down a hill, and accelerate from a dead stop as slowly as possible.
  9. drummerboy2004

    drummerboy2004 Well-Known Member

    C'mon Voodoo... you are making the rest of us look bad... ;)

    Good work... Do this long enough, and you could save the price of the car in gas :woot:

    Now, if only my commute wasn't all city, then we'd be talking...

  10. voodoo22

    voodoo22 Cheaper than the bus

    Getting the mileage you do with all city commutes is awesome. I doubt I could average that high with our car.

    I am happy to try and make you look bad though, for the people who don't understand the huge difference between highway and city miles :D

    We've cut out almost all small trips on the past 2 tanks and that's allowed me to keep over 50 again on the past tank even through snow storms and 1+hr traffic jams courtesy of people driving too fast.

    drove 923kms using 42.342 litres getting 4.58l/100km or 51.26 us MPG.

    I'm amazed at the mileage I can get with these nokian rSI's. This morning people couldn't get out of the undergound parking because of the snow and ice on the exit ramp. I saw a 4x4 Jeep, Corolla with winter tires and a Honda Accord on all seasons all slide back after spinning and have to give up. Even with all that nice ice created by the spinning tires I drove up the ramp like it was a normal day. These tires really amaze me and I'm not easily amazed.
  11. groar

    groar X-Frenchy: very

    Congrats voodoo22. Keep your needles and your dolls ;)

    Is your car stock ?

    May be can you test a grill block to heat quicker the engine.
    I'm consuming 50% more when cold (5.2l/100) than when hot (3.5). With the grill block my engine is hot after 10 km, 20-25 km without. This makes a difference as my commute is 30 km.
    Also the engine stays hot longer. When I have to drive at noon, then when I drive back to work the engine is hot after a couple km.

  12. WoodyWoodchuck

    WoodyWoodchuck Sophomore Hypermiler

    I’m testing a grill block on my Yaris this week. The upper grill is 100% blocked, the lower one 50%, drivers side. Mornings have been cold, 25 F to 30 F (I’m in NC, anything under 50 is cold). Afternoon commute in the 40’s or 50’s. While it is not the magic bullet to put voodoo22’s 50 mpg tanks to shame I have been maintaining warm weather mileages and tank averages might only go down 1 or 2 mpg.

    No issue with overheating while ICE on. It can get up to 195 F after the 1/4 mile ICE off coast into my parking spot at work. Went from 8 to 10 miles to get up to temp (186 F) down to 5 or 6 miles.

    It runs MUCH better for FE after warming up and having the grill block on and more than makes up for the initial loss of FE due to being cold. I have 4 ‘checkpoints’ along my commute where I check SG2 iMPG readings to see how I am doing. Example: at the first checkpoint on my commute I should be at 28 mpg average – for a 42 mpg to work run of 30 miles. Running cold it averages 22 or 23. Second checkpoint should be 38, cold it is 32 to 33. So after warming up, to maintain the 42 mpg trip I need to get way better mileage on the last leg. I pulled a 43.0 mpg average today with an inch of snow on the roads! Well, not all the roads, only the first couple miles cause I like out in the boonies.

    Now, where are those boat tail plans of basjoo’s aerocivic…………
  13. voodoo22

    voodoo22 Cheaper than the bus


    Yes, our car is 100% stock except for in winter when I put on winter tires.

    I'd like to test a grill block, but since I don't have a scan gauge and there's no thermostat reading in the car, I'm nervous about causing some damage. I'm also a little lazy about figuring out how I would make a grill block now that I'm in an apartment and don't have a nice warm, convenient garage to tinker around on the car in.

    I sure could have used a grill block these last few days with temperatures nearing -10 celsius!

    What kind of setup are you guys using for a grill block?
  14. PaleMelanesian

    PaleMelanesian Beat the System Staff Member

    I'm sure you can safely block the upper grill even with no instrumentation. That gives you the aero benefit as well.
  15. voodoo22

    voodoo22 Cheaper than the bus

    What temperature do you think it would be unsafe to have the upper grill blocked at?

    It can easily shoot up to the low teens in the winter for a day or 2. That's in celsius so that would be around mid 50's f.
  16. PaleMelanesian

    PaleMelanesian Beat the System Staff Member

    Even on highway trips, I have mine fully blocked up to about 60F, and halfway blocked above that. On the very hottest summer days I'll open up about 3/4 of it. Commuting in the summer I only open 1/4.

    I have a shorter drive than you do, as we mentioned earlier.
  17. voodoo22

    voodoo22 Cheaper than the bus

    Thanks for the advice Andrew.
  18. WoodyWoodchuck

    WoodyWoodchuck Sophomore Hypermiler

    Correct, with a full upper block The temp never went over 188 F even with outside temps of 60 F. I will let you know how if the engine temps go higher than this when the outside temps here moderate. I only had the heating (to 195 F) with the partial bottom block in place. I would say you are safe doing a full upper when temps are below 50 F no problem… Unless you sit in traffic a lot, I have not done this to see what the temps are when sitting there idling!

    I made my temporary one out of cardboard, the permanent one will be out of black coroplast. I’m going to make it thick enough to be as close to level as possible with the bumpercover, making it as aero as possible.

    I made 6 attachment wires using standard 12 gauge home wiring, leaving the coating attached. They were about 4” (10 cm) long and had a ‘V’ bend of about ½” (1.5 cm) on one end. I poked holes in the grill block where I wanted to have the wires attach. I put the long/straight end of the wire through the grill block and used the V end to ‘hook’ onto a section of the honeycomb grill. Moving one side of the grill to the other, so I was working with 2 wires at a time (upper one and lower one on each side of the grill and 2 in the middle). Back the grill block near the grill and hook the wires onto the back of the honeycomb grill. I then pressed the grill block tight and used needle nose pliers to put a 90 degree bend in the wire tight to the grill block, to hold the grill block tight to the grill. Total time including getting materials together maybe 20 minutes. I did this on the gravel driveway with the dog dropping slimy tennis balls onto my lap.

    Yeah, not fancy or pretty but has worked great all week, no shifting or signs of coming loose at all. I also figured this simple attachment method would be a really quick un-install, even on the highway if it started to make the engine overheat. No tools needed just bend the wires up and pull off.

    This has worked better than my expectations and I’m actually thinking of making a permanent quick-mount system in the front end. It would require drilling a few 3mm or 4mm holes and attaching 4 thumbscrew type fasteners around the upper grill opening.
  19. groar

    groar X-Frenchy: very

  20. voodoo22

    voodoo22 Cheaper than the bus

    Looks interesting, I'm going to have to sign up on that site so I can see your pictures. Thanks Denis.

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