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Showing content with the highest reputation on 08/21/2021 in all areas

  1. I think my car is down to 2 minutes but have never had any battery issues. Not even close to thinking about replacing it. I think it is about 3 or 4 yrs old. The shut-off period is probably determined by time since the battery was last reset not the battery condition.
    1 point
  2. fbov

    New Tires Problems

    Glad to hear there was a root cause for the major issues. I use Tire Rack reviews for things like rolling resistance, but I find their latest on the MaxLife has no mention of rolling resistance. That's not good, even if the tire fairs quite well in the objective testing. https://www.tirerack.com/tires/tests/testDisplay.jsp?ttid=265 Looking at the specs, I see an 11/32" tread depth. Michelin Energy Savers tread is 9.5/32". This matters because a thicker tread is harder to bend, so has greater rolling resistance. However, as a newer tire, I'd expect the MaxLife is a LRR design. This test includes the Energy Savers... in 2009. Very interesting variation in results.... https://www.tirerack.com/tires/tests/testDisplay.jsp?ttid=121 Finally, give them time. This data's from the new Escape, but the pattern is consistent. Mileage data is noisy, even if you control for things like speed and temperature. I will note that the car's rolling resistance is easy to measure. - find a paved surface that transitions from flat to hill - find the location on that surface where the car will just barely stay put, not roll - measure the angle of the surface. The Tangent of that angle is the rolling resistance. The easy way is to measure the angle in radians, which is ~= tangent for small angles like this. Put a bubble level on a meter stick, hold it level with one end on the ground. Measure the distance from the ground in millimeters. That's the RR. You want less than 0.010, I got 0.007 for my C-Max. I need to measure the Escape before the OEM tires die.
    1 point
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