Gas mileage issues, help!!
#1
Gas mileage issues, help!!
First off I'll list all the things I replaced already and info on the car.
Yr: 1991 LS400
Miles: 180,000
I've done:
-spark plugs
-water pump/timing belt with all the pulleys and seals.
-new starter
-all the temp sensors are new.
-I just changed the O2 sensors in front of the cats. Should I change the O2 sensors after the cats?
I've been getting poor gas mileage lately. Do you think It can be the other two O2's after the cat? Or the spark plug wires? Also what about the fuel filter?
The car runs and drives great with no problems and there is zero codes. I just changed the oil and always use premium gas. Can someone help me?
Yr: 1991 LS400
Miles: 180,000
I've done:
-spark plugs
-water pump/timing belt with all the pulleys and seals.
-new starter
-all the temp sensors are new.
-I just changed the O2 sensors in front of the cats. Should I change the O2 sensors after the cats?
I've been getting poor gas mileage lately. Do you think It can be the other two O2's after the cat? Or the spark plug wires? Also what about the fuel filter?
The car runs and drives great with no problems and there is zero codes. I just changed the oil and always use premium gas. Can someone help me?
#6
Pole Position
Everyones mileage will be different b/c every car runs different but the average should be 16/20 city/highway give or take a few. Personally, I get alot lower then average. Check your AFM to see if it's in spec b/c sometimes it will not set a code b/c it still has electrical to it but the ECU will go into "failsafe" mode, which will give you less mileage.
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#11
Pole Position
#12
100% city driver here with my MPG
I drive 100% city and get about 280-300 miles per tank ( 20-21 gallons )
this is with my a/c comp off 100% of the time
I also tend to be an aggressive driver
I use 91 octane gas
1991 LS400
13-15 mpg city for my car in 100% city. I have never gone on a full highway trip with her so I cannot comment...but I think I could get 20 mpg going 70 with cruise
This is not the car to own for getting decent gas millage
Someday I will have myself a hybrid accord for that.. or a Civic and just bask in the fact I could get 600 miles on a tank.
New plugs and plug cables really helped my MPG go from 9 to 14-15
this is with my a/c comp off 100% of the time
I also tend to be an aggressive driver
I use 91 octane gas
1991 LS400
13-15 mpg city for my car in 100% city. I have never gone on a full highway trip with her so I cannot comment...but I think I could get 20 mpg going 70 with cruise
This is not the car to own for getting decent gas millage
Someday I will have myself a hybrid accord for that.. or a Civic and just bask in the fact I could get 600 miles on a tank.
New plugs and plug cables really helped my MPG go from 9 to 14-15
#13
I get 67 miles for every $10 bucks i put in.
Meaning...gas light on, i put in 10 bucks. Get 67 miles driving very carefully. 50 miles if i feel the need to get on it from time to time. All city.
An $10 bucks is 2.8 gallons of 91 octane....and i have 308,xxx miles on a first gen. The most i get from a full tank is 474 miles, city/hiway combined
Meaning...gas light on, i put in 10 bucks. Get 67 miles driving very carefully. 50 miles if i feel the need to get on it from time to time. All city.
An $10 bucks is 2.8 gallons of 91 octane....and i have 308,xxx miles on a first gen. The most i get from a full tank is 474 miles, city/hiway combined
#15