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Old 09-03-2005, 02:33 AM   #11
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75 or higher i lose it because i'm above 2200 rpms..

Otherwise it'* 30+ MPG.gotten 40 once....
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Old 09-03-2005, 12:56 PM   #12
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Quote:
Originally Posted by Lowrider0308
Quote:
Originally Posted by 1993 SLE
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Originally Posted by Lowrider0308
I cruise 75 at about 2200-2300 RPM. I love my 2.84 gear ratio!
bah....at 70 i hit 1900-2000 rpms
yeah...sounds a little high. I know i run 1900-2000 at 60 though, 100% sure. I think you number might be a little low Pat.
Hey there, good to see ya again...

Your Tach is off boss... Trust me on that...

with the 2.84 gears you should be doing 1450 at about 55... and about 1800-1900 at 70-75.... I was blown away while I was watching my 91 with a scantool... I was doing 46 at 1350-1400rpms Yes those Taller gears get a little better milage..

We did the math once for what the gearing was and what the engine RPM would be at 100 mph and I think we came up with 2900 Rpms

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Old 09-03-2005, 01:04 PM   #13
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Quote:
Originally Posted by BonneMeMN
75 or higher i lose it because i'm above 2200 rpms..

Otherwise it'* 30+ MPG.gotten 40 once....
Ahhh True...

I have done my 33 at 70mph

if I do 75-76 32 seems to be the magic number.... 80-85 seems to be 29, and well the worst was 26.9 <---- No idea how that happened...

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Old 09-03-2005, 01:05 PM   #14
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im right at or right under 2k at 70 mph
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Old 09-03-2005, 01:08 PM   #15
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Quote:
Originally Posted by its840
im right at or right under 2k at 70 mph
Sounds like your tach is pretty close to accurate...

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Old 09-03-2005, 01:14 PM   #16
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Default Re: Untypical MPG question

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Originally Posted by ComfyCar
I noticed a lot of people saying they can break 30 MPG going 75-80

I can pull off 33 doing 65 but after 65 My car gets more like 25 MPG

How can some people pull off 30 MPG doing 80? Good maintanence?
I have never done 25 on the open road... I have beat the tar out of mine on the road and still pulled down a 26.9....

I have always kept it tuned, new filters, wires, plugs once or twice a year, fuel system formula every oil change.... On my way home from my trip a few weeks ago, I did 80 and a bit better, with the AC on, trunk loaded down... I stopped for fuel in SC, and clocked in the high 29'*... The rest of the trip through florida revealed the same... High 29'*...

I usually do better than 29 at almost any given time... 32 is the norm for me... I checked my O2 on the 95 and noticed that its slowing... I had been wondering why my milage was a bit less that it usually it... If I was to drive a dead on 70, I would do 33 no problem..

The above is where my O2 sensor shopping thread started... All of my cars are due...


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Old 09-03-2005, 01:17 PM   #17
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JR, how many miles do you have on those 02'*. I'm contemplating changing mine @ 47,000 miles.
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Old 09-03-2005, 01:26 PM   #18
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Quote:
Originally Posted by Custom88
JR, how many miles do you have on those 02'*. I'm contemplating changing mine @ 47,000 miles.
On the 91 I think its 42,000 miles... I made a littl goof when I was cleaning the mating surfaces.... I think I toasted the sensor a bit

On the 95 I forget... Really making me think here... I replaced one at 70,000 miles, and then at 87,000 or 88,000 the intake ruptured, after the repair the milage was 16 mpg... I replaced it... I'm at 142xxx now... 54,000 miles I think? I'm doing about 18 in town... I was doing 20-21... I seem to have lost about 3 mpg in town and on the highway...

I'm not sure what to tell you Custom....

At 47,000 it could be slowing, but I doubt that it has failed... I think your sensor is a bit on the expensive side... They say the newer ones are supposed to be good for 100,000 miles... I'm not sure that I trust that..

Its your car so thats your choice, If it was my car I personally would replace it... But weather or not it will make a diffrence is another story...

Good Luck Custom88 Let us know what you decide..

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Old 09-03-2005, 11:42 PM   #19
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mean does about 1800-1900 for 70 mph for the record my o2 has about 19890 miles on
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Old 09-04-2005, 12:45 AM   #20
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Mine is original and has almost 87,000 freakin miles. I think they are only 90 bucks a piece and theres only 2 of them (1995, haha). At least there isnt 4 like the newer auroras.

Good luck dan and let us know the results.
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