The tire alone reduced it by about 40% sounds too unreal though?Tire rolling resistance plays a huge factor in MPG but the city drop is better explained in just plain old crappy city driving. Traffic & start stops wreak havoc burning lots of fuel
My theory is that softer compound slows down acceleration. Therefore, the engine needs to burn much more fuel to get the car rolling. That's why there is such a huge drop in MPG. But I am not making this up. I attached a picture that I took two days after I installed Premier A/S. It went up to 14-16 MPG later.Tire rolling resistance plays a huge factor in MPG but the city drop is better explained in just plain old crappy city driving. Traffic & start stops wreak havoc burning lots of fuel
My theory is that softer compound slows down acceleration.
Where they lack is fuel efficiency: mine dropped from 24-27 city to 14-16 city.
I attached a picture that I took two days after I installed Premier A/S. It went up to 14-16 MPG later.
In 2-3 days I had Premiers they went to 16 MPG city. This picture was taken 2 days after I had them installed. How many miles I did drive total? I would say around 200 miles in about 5 days I had them installed. So they started with 12 MPG and went to 16 MPG, which is terrible.Just the opposite. Softer compounds typically are used to help acceleration because they provide better grip to get the vehicle in motion. But softer compounds do increase rolling resistance - which will negativity affect efficiency (mpg).
I'm confused. First you say it dropped about 10 mpg but then you say it only dropped around 2.5 to 3 mpg when comparing to your 12.5 mpg image showing your last 25 miles efficiency.
How many total miles have you put on the Michelin Premier A/S to prove your theory? And what is that average? Lastly, what would you estimate your old tire mpg would have been for comparison?
There's no way the Premiers would be a respected tire if it returned a 40% drop in fuel efficiency.. however the other number is more believable.
You have a TourX, so it is a bit longer and you have that gas guzzling AWD. I specifically wanted to get a Sportback, since I really don't like AWD, unless it is electric powered.Trying to wrap my head around these numbers....are you saying you were getting 24-27 in the city? That is my typical range for commuting to work which is mostly highway but it does have lights, so let's say it is a mix. True highway driving I get just above 30 depending on load in car and speed. Looking at Fuelly data I don't see how this is possible either since the majority of reports for overall mpg is low 20's to low 30's. There is one outlier but that data is useless since it says the last tank got like 250 mpg. I get that the tires were a softer compound but even snow tires in the middle of summer shouldn't drop your numbers that much and you would feel like you are on ball bearings.
Regal has a good chunk of hidden sporty-ness, just needs performance tires to unlock it. How is the fuel economy? I tried Pilot Sport 3+ A/S on my previous car, they were amazing, but too bumpy on my previous car. Regal has a plush suspension, so it should be a much better match.Update on Michelin tires. Cloverleaf that is very comfortable for me, Oem tires would sing to me at 30 mph. New tires going in at 40 mph and the chorus was quiet. Tracking was confidence inspiring. Liking these more with each drive.
Rolling resistance improved meaning car rolls easier compared to stock? If so it should be showing similar or better fuel economy. 24 MPG city is pretty good for TourX. Mine was 26 MPG today city driving with light traffic. I wonder how highway MPG is going to look like. It should be a lot of fun to drive right now. Cornering should be much better.Probably have 1 tank of fuel on new tires but I don’t think there is much difference if any. Rolling resistance is noticeably improved. My driving now is more urban with stoplights, trips are 10 mi, oil might get to operating temp. Dic says 24 mpg. Probably pretty accurate. Best 50 mi avg was getting into Duluth in early Dec temp low 30,s 35.9. Pretty impressive. Still no experience in the wet to report.