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Thread: Why get AWD?

  1. #241
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    Quote Originally Posted by 7eregrine View Post
    Everytime I blow one tire and have to buy 4?
    That's any car, if you maintain it correctly. Otherwise you will chew tires up/have a wonky alignment, varying levels of traction in the rain/etc.

  2. #242
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    Quote Originally Posted by Unobtanium View Post
    I'll take getting to work vs. not getting to work, even if it costs me a few dollars at the pump, I can make up for that much easier.

  3. #243
    Registered Member 7eregrine's Avatar

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    Quote Originally Posted by Unobtanium View Post
    That's any car, if you maintain it correctly. Otherwise you will chew tires up/have a wonky alignment, varying levels of traction in the rain/etc.
    Disagree. That's not been my experience.

  4. #244
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    Quote Originally Posted by 7eregrine View Post
    Everytime I blow one tire and have to buy 4?
    You could buy one new one and have it shaved down to match tread depth of the others. With AWD, tread depth should usually have no more than 1/4 inch variance between all tires.

  5. #245
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    Quote Originally Posted by 7eregrine View Post
    Disagree. That's not been my experience.
    Seconded.

    But Over time, the front camber on my 528i moved to 0.0 degrees which worked fine just not so great for cornering. Modern cars hold their alignment quite well.

    Maintaining your car is always changing the oil on time and other items like your air filter, spark plugs etc

  6. #246
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    Quote Originally Posted by madar View Post
    You could buy one new one and have it shaved down to match tread depth of the others. With AWD, tread depth should usually have no more than 1/4 inch variance between all tires.
    1/4" is more than 6mm which is more than half of the useable tread in most new tires.

  7. #247
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    Quote Originally Posted by murky View Post
    1/4" is more than 6mm which is more than half of the useable tread in most new tires.
    Exactly. Time to replace it, anyways.

  8. #248
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    Quote Originally Posted by murky View Post
    1/4" is more than 6mm which is more than half of the useable tread in most new tires.
    1/4 inch VARIANCE, NOT 1/4 inch of tread left...

  9. #249
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    Quote Originally Posted by madar View Post
    1/4 inch VARIANCE, NOT 1/4 inch of tread left...
    Understood. 1/4" is 8/32" If you buy a new tire with 10/32" of tread, the only way it could vary from the other tires by 1/4" is if the other tires were 2/32" remaining tread or less. At 2/32" they are ready to be replaced anyway.

    You'd be an original kind of crazy if you bought one new tire and shaved it down to 2/32" so you had a matching set of tires that all needed to be replaced.

  10. #250
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    Ideally it would be good to change tires in pairs. However if you should decide to change just one tire for budget purposes, you should also consider the thread depth of the opposite tire. If it's nearing it's life then I guess it really needs replacement.

  11. #251
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    Quote Originally Posted by murky View Post
    Understood. 1/4" is 8/32" If you buy a new tire with 10/32" of tread, the only way it could vary from the other tires by 1/4" is if the other tires were 2/32" remaining tread or less. At 2/32" they are ready to be replaced anyway.

    You'd be an original kind of crazy if you bought one new tire and shaved it down to 2/32" so you had a matching set of tires that all needed to be replaced.
    You're missing the point. It doesn't literally have to be a 1/4 inch. Maybe a 1/4 inch is just a bad example. It varies. Some manufacturers offer a variance as little as 2/32 inch. Are you going to throw away 3 good tires then if all the tires are fairly new? My point is this, AWD demands 4 tires with a circumference fairly close to one another set by the manufacturer otherwise you're going to damage the AWD system. FWD isn't so picky but if I had to replace a tire I would do it in pairs per axle putting the good tires on the rear.
    Last edited by madar; 08-13-2017 at 10:15 AM.

  12. #252
    ZOOOOOOOOOM ZOOOOOOOOOOOM mazdadude's Avatar

    '16.5 Mazda CX-5 Touring AWD, '09 Mazdaspeed3

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    I wanted to do some math on the actual cost of the extra FUEL USAGE for the AWD.

    Driving 12,000 miles per year, and our AWD getting a combined avg of 25mpg for the year equals 480 gallons of fuel a year. (12000/25=480)

    If we had a FWD our combined mpg for 12,000 miles would be 27 mpg, or 445 gallons used per year. (12000/27=444.44)

    So if AWD makes us use 35 more gallons of fuel over a year of driving 12,000 miles, at an avg cost of $2.50 a gallon, that means our annual fuel bill is $87.50 a year higher.
    Mazda's I have owned over the years.
    80' Mazda GLC SPORT MT - sold
    81' Mazda 626 DX MT - sold
    81' Mazda 626 LX AT - sold
    82' Mazda 626 DX MT - sold
    82' Mazda 626 LX AT - sold
    85' Mazda 626 LX MT - sold
    87' Mazda 626 GT Turbo MT - sold
    85' Mazda RX-7 GSL-SE MT- sold
    87' Mazda RX-7 Turbo 2 MT - sold
    91' Mazda Protege LX MT - sold
    92' Mazda MX-5 Miata MT - sold
    93' Mazda MX-3 GS-V6 Special Edition MT - sold
    00' Mazda 626 LX-V6 MT - sold
    02.5' Mazda Protege5 MT - sold
    92' Mazda MX-5 Miata MT - sold
    06' Mazda 5 Touring AT - sold
    13' Mazda CX-5 Touring AT - sold
    14' Mazda 3i Grand Touring MT - sold
    15' Mazda CX-5 Touring AWD AT - sold
    03' Mazda Protege5 AT - sold
    16.5' Mazda CX-5 Touring AWD AT - current
    09' Mazda Mazdaspeed3 GT - current

  13. #253
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    Quote Originally Posted by madar View Post
    the good tires on the rear.
    I don't understand why people do this for FWD cars. The wheels that drive, stop and steer need to have less traction just so the rear end doesn't step out on you?

    If you're such an inexperienced driver (not you, but everyone else who thinks this is the rule) that you're worried about some oversteer, you're not gonna be causing a FWD car to drift because you just don't have the skill to do that. It makes absolutely zero sense to me.

  14. #254
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    Quote Originally Posted by GJ-Molestor View Post
    I don't understand why people do this for FWD cars. The wheels that drive, stop and steer need to have less traction just so the rear end doesn't step out on you?

    If you're such an inexperienced driver (not you, but everyone else who thinks this is the rule) that you're worried about some oversteer, you're not gonna be causing a FWD car to drift because you just don't have the skill to do that. It makes absolutely zero sense to me.
    Agree, always put the best tires on the front on FWD.

  15. #255
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    Quote Originally Posted by mazdadude View Post
    I wanted to do some math on the actual cost of the extra FUEL USAGE for the AWD.

    Driving 12,000 miles per year, and our AWD getting a combined avg of 25mpg for the year equals 480 gallons of fuel a year. (12000/25=480)

    If we had a FWD our combined mpg for 12,000 miles would be 27 mpg, or 445 gallons used per year. (12000/27=444.44)

    So if AWD makes us use 35 more gallons of fuel over a year of driving 12,000 miles, at an avg cost of $2.50 a gallon, that means our annual fuel bill is $87.50 a year higher.
    If you really need it, I would think it would be worth it no matter the cost.

    But I drive about 30-35K per year and live in Texas. I usually trade around 100K, so with your formula it would cost me an additional $750 at the low prices we have for fuel now. Add $1300 for additional purchase price. And then there is the tires. If I run over something and need to replace 1 tire, I will replace 1 tire. I might replace 2 if they are worn pretty bad and put them on the front. No way I am replacing 4 tires if they don't all need it. Also, I am out in the middle of nowhere a lot. Not sure what you AWD guys do when you have a blowout. I guess you drive on the temporary spare that has a significant difference in outside diameter? What if you are 100 miles from a tire shop?
    Anyway, at least $2k saved and probably much more for a feature I don't need and will possibly be a hindrance to me. That will get me the HUD, power passenger seat, and memory driver's seat and some money left over.

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