gas milage - BMW Forum - BimmerWerkz.com
3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 01-05-2006, 12:40 PM
1st Gear Member
 
Join Date: Sep 2003
Location: Cheltenham, Pennsylvania
Posts: 138
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
viali8 is an unknown quantity at this point
(Thread Starter)
gas milage

hello all,
I have an 87 325 with 216,xxx miles. just recently i have a seen a drastic drop in my gas milage. When i first bought the car i was getting about 260-270 miles per tank in the city and 340-350 on the highway. Now i am only getting about 260 miles to the tank on the highway.
I changed the fuel filter about 40,000 miles ago. What could it be that is giving me such poor gas milage? Also i bought the car with 177,xxx miles but never changed the O 2 sensor. Could that be the problem?
Has anyone had the same problem before and what did u do to fix it? Oh also i am driving with snow tires on the back, but i doubt that makes not much of a difference.
viali8 is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 01-05-2006, 07:56 PM
5th Gear Member
 
Join Date: May 2004
Location: NC
Posts: 1,118
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Starmavin is a jewel in the rough Starmavin is a jewel in the rough Starmavin is a jewel in the rough Starmavin is a jewel in the rough
Quote:
Originally Posted by viali8
hello all,
I have an 87 325 with 216,xxx miles. just recently i have a seen a drastic drop in my gas milage. When i first bought the car i was getting about 260-270 miles per tank in the city and 340-350 on the highway. Now i am only getting about 260 miles to the tank on the highway.
I changed the fuel filter about 40,000 miles ago. What could it be that is giving me such poor gas milage? Also i bought the car with 177,xxx miles but never changed the O 2 sensor. Could that be the problem?
Has anyone had the same problem before and what did u do to fix it? Oh also i am driving with snow tires on the back, but i doubt that makes not much of a difference.
It all depends on if you have noticed a performance change with the drop in your mpg. The coolant temp sensor, O2 sensor, air temp sensor (built into your air flow meter) the airflow meter itself all heavily effect the MPG (and running quality) of your car. Along with spark plugs, weak conducting wires, wore out cap and rotor. Also don't rule out failing wheel bearings and dragging breaks as well. Just to skim the surface.

The most common to drop the MPG of most any car is the O2 sensor, it should be swapped out about every other timing belt change if you change it at the 30,000 mile marker.
Starmavin is offline  
#3 (permalink) Old 01-10-2006, 12:10 PM
1st Gear Member
 
Join Date: Sep 2003
Location: Cheltenham, Pennsylvania
Posts: 138
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
viali8 is an unknown quantity at this point
(Thread Starter)
gas milage

now that u mention the wheel bearing. i do need new ones in the front. they are starting to make noise but i didn't think it would affect my gas milage. thanks for the info.
viali8 is offline  
#4 (permalink) Old 01-12-2006, 08:10 PM
5th Gear Member
 
Join Date: May 2004
Location: NC
Posts: 1,118
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Starmavin is a jewel in the rough Starmavin is a jewel in the rough Starmavin is a jewel in the rough Starmavin is a jewel in the rough
Any drag on the car will cause a drop in gas milage, just try driving around with about 10-15 psi out of your tires.
Starmavin is offline  
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E21, E30)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Get a Free $250 Gas Card! jonson Wheels and Tires 0 10-17-2005 02:50 AM
Erratic Gas Guage misterervin 3-Series (E21, E30) 5 09-22-2005 09:20 AM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome