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  #11  
Old 09-27-2021, 06:42 PM
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Quote:
Originally Posted by Fifty150hs View Post
I've been driving for 46 years now, all of them in California, SF Bay Area. There were years my job had me putting in 20,000 to 30,000 miles a year. Drivers have gotten worse and worse. They were never very good, it's too easy to get a license, but the last few years have been particularly bad as things have declined.
The problem is uber/lyft/ridesharing. More cars on the roads, and worse yet, more drivers who drive like taxi drivers on the roads.
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  #12  
Old 09-28-2021, 10:37 AM
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Although my E53 went off to another owner in February, this was the cons2 mileage at the time of sale. The prior reset was at about 261,000 miles when the O2 sensors were replaced.
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  #13  
Old 09-28-2021, 12:36 PM
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Originally Posted by srmmmm View Post
Although my E53 went off to another owner in February, this was the cons2 mileage at the time of sale. The prior reset was at about 261,000 miles when the O2 sensors were replaced.
Yeah I think replacing O2 sensors is a good idea and maybe a lazy MAF sensor too. I made the mistake of buying non-bosch O2 sensors, so I always get the shadow fault for the heater circuit in the DME... -_-

I plan on just shovelling out the cash for the legit bosch ones and also considering MAF. This will def help out with mileage.
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  #14  
Old 09-28-2021, 02:08 PM
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I actually recorded a significant gain in MPG after I replaced a bad thermostat as well. I was getting around 14mpg average (in mostly city/short trips/cold temps conditions) and it immediately jumped up to 16-17 after I replaced it, during a cooling system overhaul. My heater also started working much faster and hotter as well. I didn't realize it had been bad, I just thought it was my driving, but the car warmed up much faster and probably had never been reaching operating temperature before.
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  #15  
Old 09-28-2021, 02:12 PM
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i usually get about 16-17 with heavy mix of city/hwy. i'll get 22 highway usually.

I have the 3.0 (2001); wife with 2012 50i gets 17–18 typically average, and 21-22 highway just like me; crazy 80% more HP and more than twice the torque, but same MPG!
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  #16  
Old 09-28-2021, 02:26 PM
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Originally Posted by Bdc101 View Post
I actually recorded a significant gain in MPG after I replaced a bad thermostat as well. I was getting around 14mpg average (in mostly city/short trips/cold temps conditions) and it immediately jumped up to 16-17 after I replaced it, during a cooling system overhaul. My heater also started working much faster and hotter as well. I didn't realize it had been bad, I just thought it was my driving, but the car warmed up much faster and probably had never been reaching operating temperature before.
Yeah...a properly working thermostat is another VERY key thing to consider as well for proper cold start, warming up running.. Especially since the DME controls the extra opening in certain events where it might be needed.

I think this would be most noticeable in the colder months for better MPGs, barring the crappier fuel mixtures for "winter blended fuels."
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Old 09-28-2021, 03:12 PM
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Originally Posted by RocketyMan View Post
Yeah...a properly working thermostat is another VERY key thing to consider as well for proper cold start, warming up running.. Especially since the DME controls the extra opening in certain events where it might be needed.

I think this would be most noticeable in the colder months for better MPGs, barring the crappier fuel mixtures for "winter blended fuels."

Indeed, and when I fixed my thermostat, it was right at the end of a project at work that required a lot of short trips during the winter. Actually during a blizzard. We had 36" of snow during the first day of that blizzard, and it stuck around for months. So that is probably part of why it was so noticeable for me.



You can actually look up the winter gas formulations and when the switch date is for your state. The feds mandate all of that stuff. If you do really consistent driving you can notice the drop on your mileage logs.

But the plus side is that it is slightly cheaper, so usually your cost per mile doesn't change.
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  #18  
Old 09-29-2021, 04:39 AM
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just had the thermostat and clutch fan replaced... seems like mileage is up! still drinks like a buffalo but yeah...
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  #19  
Old 09-29-2021, 05:48 PM
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Originally Posted by Bdc101 View Post
Indeed, and when I fixed my thermostat, it was right at the end of a project at work that required a lot of short trips during the winter. Actually during a blizzard. We had 36" of snow during the first day of that blizzard, and it stuck around for months. So that is probably part of why it was so noticeable for me.



You can actually look up the winter gas formulations and when the switch date is for your state. The feds mandate all of that stuff. If you do really consistent driving you can notice the drop on your mileage logs.

But the plus side is that it is slightly cheaper, so usually your cost per mile doesn't change.
In terms of the OP about mileage and the time of the year, gas quality is very important thing to consider as well!

I tried doing a web search for when and where summer blend changes to winter blend. Do you have a reliable site that tells when the formulation changes per state?
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  #20  
Old 09-29-2021, 06:27 PM
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I tried finding the map I have seen before, but I'm having trouble finding it.



Here is one good article from C&D:
https://www.caranddriver.com/news/a1...ine-explained/


I'll do some more searching later.
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