Sudden increase in gas milage
#1
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Sudden increase in gas milage
While driving around the past few days i've noticed a dramatic increase in gas milage. I just replaced my knock sensor and installed a cat-back but it just doesn't seem like those 2 things would cause a big difference in gas milage. On top of that i've been pulling the 0302 egr code but I do mostly city driving so I don't think that really has an effect on it. I reset the ecu and that code has not come back yet. I drive my car pretty hard and haven't always been getting the greatest gas milage but I haven't changed my driving habits and I can definately notice a gas milage increase. Usually I would eat up around 1/8th of a tank in 2 days going to and from school but now it seems like it eats up almost half that in the same trip. I'm guessing it's probably because of the knock sensor. I don't think a cat-back would cause an increase like what i'm seeing. Anyone else notice an increase in milage from a KS replacement?
#8
Originally Posted by Max_Out
also with the season changing to winter. gas companies have up the quality of gas. well theirs some additive to make it combust better.
#9
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Originally Posted by 99grnmaxgxe
Actually they add more stuff so the gas won't freeze and that makes the gas mileage WORSE. Sorry to burst your
ive just always heard that some where. maybe it just combusts better due to the cold air associated with the winter climate. that also my cause and increase in MPG but not sure.
#12
You have a VQ30DE. The VQ35DE, denotes a 3.5 litre engine, introduced in the 2002 model year. You have a 3.0 litre engine.
Originally Posted by SSzretter
I know this post is not related to this thread, but I am not allowed to create new posts yet...
How do I know what type of VQ engine I have?
For example, VQ30DE or VQ35DE, etc.?
I have a 1996 Maxima...
How do I know what type of VQ engine I have?
For example, VQ30DE or VQ35DE, etc.?
I have a 1996 Maxima...
#13
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Originally Posted by x X CLoud X x
how much was the Knock Sensor and where did you buy it? any place cheaper then paying retail from Dealer?
#15
Originally Posted by SSzretter
I know this post is not related to this thread, but I am not allowed to create new posts yet...
How do I know what type of VQ engine I have?
For example, VQ30DE or VQ35DE, etc.?
I have a 1996 Maxima...
How do I know what type of VQ engine I have?
For example, VQ30DE or VQ35DE, etc.?
I have a 1996 Maxima...
#16
u cant base it off your tank needle. Yea maybe nothing has changed physiclly. drive same roads, same time. park same places and junk like that but the best way to define MPG is thru milage driven/ gallons. That way you can say. Hey i got 3 mpg increase due to KS and exhaust.
I just changed my KS and honeslty i'm getting worst mpg because i'm mashing the pedal more....=P i was already getting decent 20city-25 highway, specs for any auto isn't too far off i think 22/28. maybe my knock did help me but i wont find out this tank of gas.
I just changed my KS and honeslty i'm getting worst mpg because i'm mashing the pedal more....=P i was already getting decent 20city-25 highway, specs for any auto isn't too far off i think 22/28. maybe my knock did help me but i wont find out this tank of gas.
#18
Originally Posted by NYC32798
While driving around the past few days i've noticed a dramatic increase in gas milage.
So after collecting a little more data, you'll have a more accurate idea of the effect of the knock sensor.
Dave
#19
The additives in winter fuel formulations are to make the fuel combust more cleanly and produce fewer emissions, especially on a cold startup. They're really only for cars without O2 sensors and cars that aren't functioning normally. They definitely reduce gas mileage for the rest of us.
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