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Aftermarket wheels and range on 500e - Page 8
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Thread: Aftermarket wheels and range on 500e

  1. #71
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    REGARDING NITROGEN: I just read a Consumer Reports and a Popular Mechanics article which states Nitrogen tires improves the range, reduces tire corrosion and maintains proper tire inflation longer, but only a very small amount. The difference is probably too small to be worth the extra money and inconvenience of Nitrogen vs air. So unless you have quick and cheap access to nitrogen, it's probably best to save your time and money. But technically speaking Nitrogen IS better. https://www.popularmechanics.com/car...ogen-in-tires/
    Quote Originally Posted by map View Post
    I recall GM recommending nitrogen when they first introduced TPMS, still recommended it as of 2005. Part of the reason was that the machine that separated nitrogen also separated out more water. Besides, they can't charge you $64 for air. (It was $16 or $18 to fill with nitrogen at my tire shop, and I think that was per tire.) Around 2010 our tire shop had brochures on why to use nitrogen. Supposedly, being a larger molecule, oxygen would escape while nitrogen would not, so your tires would maintain a proper inflation. If that is true, inflating your tires with air, something like 70% of the oxygen would deplete in a year... so you have a nitrogen fill. <g>

    He might have seen an increase in range after filling with nitrogen. A properly inflated tire will have less rolling resistance.

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    Quote Originally Posted by Jen A View Post
    REGARDING NITROGEN: I just read a Consumer Reports and a Popular Mechanics article which states Nitrogen tires improves the range, reduces tire corrosion and maintains proper tire inflation longer, but only a very small amount. The difference is probably too small to be worth the extra money and inconvenience of Nitrogen vs air. So unless you have quick and cheap access to nitrogen, it's probably best to save your time and money. But technically speaking Nitrogen IS better. https://www.popularmechanics.com/car...ogen-in-tires/
    Good points.

    Nitrogen makes sense in a race/track car, aircraft or heavy industrial use. For the rest of us, not so much. The advantage is less moisture vapor (about 1/2% of air, with a decent moisture trap). The nitrogen separators trap most of that water and fill the tire to about 94% nitrogen. Consider, air is 78% nitrogen. As air escapes the tire, about 75% is oxygen and 25% nitrogen. Each time you refill, you are replacing with 78% nitrogen, 11% oxygen. Gradually the nitrogen mix is getting richer w/o spending money. The bad: Moisture capture systems at tire shops are getting better, but will never remove as much water as the Nitrogen generators, but air can hold moisture, nitrogen apparently cannot.

    The cost savings mostly come about because the tires remain at a constant pressure. You have to add air about 1/3 as often, from air loss. With reasonably accurate TPMS sensors, we can tell when air pressure drops below normal, so running improper pressure isn't the problem it once was. With tire rotations, I'm having to drop/raise pressure every 5K miles in any case. The TPMS system lets me know when pressure varies as air temps change. I was in the driveway last week, adding 3 pounds to all 8 tires on my cars. Another advantage... exercise from using a hand pump. <g>

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  4. #73
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    Quote Originally Posted by Jen A View Post
    ... I think the older ones have less range... However, it's hard to say because once I was out of traffic, I tend to put the petal to the metal. There is a MASSIVE range difference ... full speed on the freeway with the AC running.
    Yes, speed makes such a MASSIVE difference that even a few mph can alter it. I can get to my grocery store & back on 10% charge if I take my time, but it takes 20% going as fast as possible. This is why it's SO hard to figure out if our batteries are depleted 5% or 10%. A few mph of headwind can make your battery seem like it's dying!

    When I tested it, A/C made no range difference at moderate settings like 78F with the fan medium-low & unused passenger vents closed. This is most likely because the battery becomes more efficient at higher temps, peaking I think somewhere around 125F.

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