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Toyota Prius



  • Noting that some Prius owners have expressed discontent with the Goodyear Integrity tire, I have done a little research on possible substitutes. I guess, for comfort and ride, I should be more interested in a touring tire than a high performance tire and, for traction, grip etc. a 195/60 15 rather than the OEM 185/65 15. Am I correct? If I am, then which of the following tires would you be likely to choose.
    Bridgestone Turanza; Yokohama Avid Touring; or the Goodyear Regatta.
    I also note that the Yokohama Avid Touring tire has a max. PSI of 35# rather than the usual 44# does this mean that I would get worse mileage with the Yokohama vis-a-vis the others?
    I haven't received my Prius yet. Just checking these many options.Or,should I forget the touring tire and go with the Bridgestone Potenza despite the fact that I am a pretty average elderly driver. A little input from any who have opted to swap out the OEMs for another tire would be most welcome.
  • john1701ajohn1701a Posts: 1,897
    > EV Button... will Toyota support this change?

    I suspect they will offer it as an aftermarket upgrade later on, just like they did with cruise-control for the 2001 model.

    > How will this change the car?

    You'll be able to accelerate using only electricity with the greatest of ease. No need to be careful with the pedal in this mode.

    Note though that there is NOT a MPG improvement under normal driving conditions. The benefit comes when you are trapped in very heavy stop & slow traffic or when you need to drive a very short distance. In those cases, you really will save gas since the engine running will be offset to a more efficient time.

    > second battery pack in a car, how was this done and again
    > does Toyota support this change?

    No comment on how it was done (liability concern) and Toyota definitely will not support this under warranty coverage. Later on though, it could become an aftermarket possibility.

  • The only Prius merchandise that I'm aware of is available through the Toyota Outfitters catalog. You can see the catalog at the parts counter of most dealerships. When I reviewed it there were only 3 items. The Hybrid Synergy Drive keychain; a T-shirt (not so cool IMHO); and a pretty nice drinking glass made from a recycled wine bottle with a sand blasted design.

    FYI - These cannot be ordered online yet. For some reason you MUST order through the Toyota catalog from the dealership.
  • john1701ajohn1701a Posts: 1,897
    The normal 10kW limit is extended all the way up to 27.4kW, which translates to a horsepower increase of about 23.

    The confusion comes from your electricity source assumption. The engine isn't available to feed the motor during EV drive, so 100% of the electricity has to come from the battery-pack. That means the 67hp isn't available in the first place. It is actually only 13 (without EV) using just the single source. But that is enough to propel the car at a rate of up 42 MPH for over 2 miles. Normally you wait for STEALTH to do it slowly or just trigger the engine to start up. With EV, you can drop the pedal with high confidence that the engine will remain off.

  • backybacky Twin CitiesPosts: 18,905
    FWIW, I put Regatta II's on my minivan about 18 months ago, replacing the OEM Michelins. I have been very happy with their performance. Quiet, good grip in wet and snow, good handling (this is a minivan though), no signs of wear after 15,000 miles (still have some of the green stuff in the treads from the factory).
  • rpgolferrpgolfer Posts: 157
    Midnightcowboy - I realize how lucky I was to be in the right place/right time getting the Prius. I believe the salesman didn't want to lose a sale - be it the original purchaser or me. So I took advantage of a rare opportunity.

    Tire question - As expected, my Prius came with the Goodyear Integrity 185/65 R15 86S. The tire states max pressure 44 PSI. What are the best pressures for the front/back? I want to optimize mgp and willing to sacrifice a little ride comfort. Any effect on VSC?
    Thank you
  • john1701ajohn1701a Posts: 1,897
    Now it is revealed why you are so adversarial. Confusion about how Prius actually works will do that.

    Here's what everyone needs to understand:

    The engine delivers electricity to the motor 100 PERCENT of the time it is providing thrust to the tires. In other words, ALWAYS. And that is what gives the electric propulsion its umph. So when you accelerate moderaterately, the battery-pack isn't used at all. When you accelerate aggressively, the battery-pack joins in. That is the "hybrid" behavior.

    The "electricy-only" behavior is when only the battery-pack is used. "Stealth" has a delivery limitation of 10kW. "EV" bumps that value all the way up to 27kW. So it is like the engine is joining in too. But in reality, it is actually off still.

    The point of "EV" is to give you aggressive acceleration abilities without triggering the engine to restart. It also allows you to delay warmup to a more efficient time.

    The point most often overlooked is the fact that the maximum electric-only speed is 42 MPH. So the HP values you see posted are combined, with the engine.

  • john1701ajohn1701a Posts: 1,897
    > EV is a lock and hold stealth mode period!

    It very is a noticeable power increase to stealth mode. Dead silent and vibrationless acceleration & cruising is a factor those seeking luxury aspects will truly appreciate.

    It also provides the ability to manually control warmup, a genuine opportunity to increase MPG in stop & slow traffic and on short-trips.

  • john1701ajohn1701a Posts: 1,897
    > What are the best pressures for the front/back?

    42 PSI front
    40 PSI back

    That is unquestionably the favorite among Prius owners.

    I personally run 44/42. All this winter (here in Minnesota) the tires have been that way. If anything, it improves handling. VSC was only needed once. Not really any sliding for me. Though, I do take advantage of "B" for controlled slowing on curves, quickly shifting into it when I discover at the last minute I'm going a little to fast (which is pretty darn easy with the convenient positioning of the shifter, all you have to do is feel for it without the need to even look down).

  • Can one install a hood wind deflector on the Prius? I was interested from a paint protection point of view...also what about side window deflectors to allow windows to be open in the rain as well as vent the car during the summer months...the aft window on the hatch looks like it could collect allot of RAYS.

    Has anyone tried???

  • I have looked everywhere for a hood deflector with no luck. I don't believe they exist yet. I already have a scattergun pattern on my hood and would gladly sacrifice whatever economy to protect it from her on. I'm sure this opinion pulls a gut string for those who try for every tenth of mpg but I'm growing very weary of enduring the testosterone squables of those individuals and appreciate everybody else's feedback. Let me know if you find a vendor!
  • xcelxcel Posts: 1,025
    Hi Alnvilma:

    ___Have you ever heard of 3M’s Clear Bra? It is usually not an inexpensive prospect if you have a shop do it for you but it will protect your automobile and will not decrease its aerodynamic efficiency in the least … DIY and the cost drops significantly. There is a company that makes the pre-cut 3M Clear Bra kits for your 04 Prius called Invinca-shield. This link might help …

    ___Good Luck

    ___Wayne R. Gerdes
  • rpgolferrpgolfer Posts: 157
    John1701a - Thank you
  • rpgolferrpgolfer Posts: 157
    Good morning,
       When I reach 3K miles, I am considering changing oil to the synthetic type. How many miles will the syn oil last between changes? Also, how much longevity should it add to the life of the engine?
       When I start out on flat ground, with normal foot pressure on the accelerator the gas engine seems to come on rather soon versus the elec motor solely. Am I pressing down just a little too much? I don't drive conservatively with mpg in mind.
  • john1701ajohn1701a Posts: 1,897
    Extending change duration when using synthetic oil is simply not a good idea in any vehicle. The risk of voiding the warranty is just plain not worth the couple of dollars you'll save.

    As for stealth driving, it is quite difficult during the cold season. Once temperatures warm up *AND* you have a hot engine *AND* you've had practice working the pedal, you'll be able to do amazing things using only electricity. I can climb the parking-ramp levels from a dead stop without the engine ever starting. It's great!

  • The Japanese Prius accessory web page has it available in Japan. Pretty neat looking too. It's just a matter of time before it will be made available here in the U.S.
  • Hi-
    I've been watching the Hybrids with interest for years with an eye to buy one when I thought they were what would fit my lifestyle. The 2004 Prius fits the bill and I finally went to a local dealer.

    I was put on a waiting list (with deposit) and told that I would have the car in 3 to 5 months. Then I heard from another dealer who said that Toyota sent out a letter to all the dealers in the Mid-Atlantic region saying that they would not be receiving anymore Prius until September when the 2005 come out.

    Has anyone else heard this and is this true?
  • wwestwwest Posts: 10,706
    Porsche recommeds ONLY Mobil 1 for the new water cooled models and 15k between changes. I doubt if engine life will enter into the equation if you follow the recommeded maintenance procedures, most engines are going over 200k these days without any repairs.

    Doesn't Toyota recommed 7500 mile oil changes for the Prius like they do for all the others?
  • Little_pogi...can you state the Japan web site that shows these window deflectors??? Would be nice to see the picture.


  • Try this,

    Go to the 2nd to the last folder and click on the "confortable item/basic item/other item".

    You may have to manually enter this URL. I just don't know why clicking on the link doesn't get you there.
  • rpgolferrpgolfer Posts: 157
    Are car covers available for the '04 Pruis?
    Thank you,
  • FYI - I just got back from a trip from home at sea level up to 7000 ft. elevation (Big Bear Lake, CA). We made this trip twice this week. Going up the mountain the ICE struggled and the battery level got down to 2 bars. Coming down was no problem. Temps. ranged from 70 in LA to 25 up on the mountain. I had no problems at the lower temps. My MPG still averaged 45 mpg over the trip. I'm still very happy with my Prius. I'll hit 3000 on the odo. this week.
  • John1701a you stated: "The engine delivers electricity to the motor 100 PERCENT of the time it is providing thrust to the tires. In other words, ALWAYS."

    I assume this means ICE is active when supplying torque to the tires...except when coasting or startup using mild acceleration below 42 mph then electric ONLY ...NO ICE active ???

    Has anyone attempted to run sleath mode for extended periods to see what MPG results are??? Seems like MPG may be better then when you moderately accelerate which would then use both ICE and the electric motor (more stuff in use...less MPG)??

    Any comments???

  • I've been hearing a lot of rumors (I hope) that Toyota is no longer, or soon will no longer, be accepting orders for the 2004 Prius, and instead people will have to wait until September when the 2005's start coming out. Can anyone actually confirm this?

    I ask mainly because I really want to buy a Prius, but don't quite have the finances worked out yet. I expect it will be another 2-3 months before I'll be sure I have everything worked out, and be ready to place my order. If I have to wait until September, I will, but it will mean putting a little more money into my current car until then, which obviously I'd like to avoid. Also, I live in Virginia if it matters. I appreciate any help anyone can give me.
  • john1701ajohn1701a Posts: 1,897
    > 7500 mile oil changes

    For the Classic model, which only had a redline of 4000 RPM, that was the recommended interval. That combined with the fact that the engine isn't used heavily in the first place made the 7500 miles pretty realistic. With mine, it was quite clear that the synthetic was in much much much better shape than my Taurus ever was at just 3000 miles.

    For the 2004 model, the RPM is up'd by 500. That really shouldn't make a whole lot of difference, since the larger motor helps to offset. Even so, the recommendation is for 5000 miles. I haven't driven the full duration yet, so I can't report on the status.

  • rpgolferrpgolfer Posts: 157
    What the is factory recommended and Prius owner recommended oil change frequencies for dino oil/syn oil? On my previous Detroit vehicles, I usually aimed for 3K miles between changes, even though factory recommendations are higher. Should I still target 3k or 5k intervals?
      Also, I don't know if there is any carry-over from Corvette accelerator muscle-memory to a Prius accelerator muscles, but it seems no matter how gently I try to accelerate, the ICE comes on either to re-charge or power the wheels. I don't live on flat ground and I don't drive aggressively. Could it simply be on-the-job-training in progress?
    Thank you
  • john1701ajohn1701a Posts: 1,897
    > What the is factory recommended

    Every 5000 miles.

    > it seems no matter how gently I try to accelerate,
    > the ICE comes on either to re-charge or power the wheels

    Using only electricity for acceleration is not an efficient method, so the system typically won't let you.

    The most efficient use of the electricity is for maintaining a cruise at 30, 35, or 40 MPH. So that is when the engine will most commonly shut off while driving.

  • SylviaSylvia Posts: 1,636
    A California reporter is looking to interview any California resident who has owned a Honda Civic Hybrid, Honda Insight or Toyota Prius.
    Please respond to by Tuesday, Feb 24, 2004 with your daytime contact info if you care to share your story.
    Jeannine Fallon
    PR Director
  • Has anyone attempted to run sleath mode for extended periods to see what MPG results are??? Seems like MPG may be better then when you moderately accelerate which would then use both ICE and the electric motor (more stuff in use...less MPG)??

    Any comments???
  • lok888lok888 BostonPosts: 1,788
    As far as I know Toyota only build 50,000 units in Japan and ship worldwide during the first production year. I spoke to my Toyota sales rep last week. The wait time is 7 to 12 months in New England region. By that time, we are probably taking about 2005 model. Some decided to get a Civic hybrid. Some local Honda dealers have few in stock plus the low APR offer.
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