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  #1  
Old 07-19-2006, 09:42 PM
disbo disbo is offline
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Question Gas gauge and miles per tank question

Hi, I shot a note out last week about my gas gauge not going to full and hitting the E dash at around 200 miles. An 18 gallon tank I should get 350ish. I have a 5 speed so I should get a bit better than the standard 18-25 MPG???

What miles per tank do yall get?

The gauge thing is bugging me too. Are there any other Subi models that have the same sending unit? Im sure the dealership will rape me if I get a new one there..

Thanks Chris
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  #2  
Old 07-19-2006, 10:03 PM
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Quote:
Originally Posted by disbo
Hi, I shot a note out last week about my gas gauge not going to full and hitting the E dash at around 200 miles. An 18 gallon tank I should get 350ish. I have a 5 speed so I should get a bit better than the standard 18-25 MPG???

What miles per tank do yall get?

The gauge thing is bugging me too. Are there any other Subi models that have the same sending unit? Im sure the dealership will rape me if I get a new one there..

Thanks Chris
90-94 Legacies might have the same sending kit. However, a used one will probably have the same problem as you do when it comes to the gauge being wacky. I don't trust the gauge on my car, but I do trust the low fuel light. They are on different senders.
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  #3  
Old 07-19-2006, 10:15 PM
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Miles Per Tank

Quote:
Originally Posted by disbo
Hi, I shot a note out last week about my gas gauge not going to full and hitting the E dash at around 200 miles. An 18 gallon tank I should get 350ish. I have a 5 speed so I should get a bit better than the standard 18-25 MPG???

What miles per tank do yall get?

The gauge thing is bugging me too. Are there any other Subi models that have the same sending unit? Im sure the dealership will rape me if I get a new one there..

Thanks Chris
Most of my Rel's are in Giles County, near the WV line.
Wa'ssup Virginia!!!

I routinely get right at 370 miles per tank before freakin towards a fuel area.
Works out to a normal 22 to 25 per gallon in my service area, and I spend most of the time on the highways.
I guess the saddle tank is the problem, and it seems that if you run the tank as deep as you can stand before filling it, then it gets more accurate.
You can get the needle right about 75 degrees negative before the light comes on.
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  #4  
Old 07-19-2006, 11:27 PM
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My Best was 401 Miles on 12.6 Gallons across Oregon up the Interstate 5. I kept it at 60-70MPH and no AC or windows down with bald tires This was not fun but I had to see what the best I could do was.

The rest of the trip from LA to Vancouver was:

270Miles =10.7 Gal (Southern Cali)
368Miles =12.6 Gal
379Miles =13 Gal
401Miles =12.6 Gal
119Miles = 4Gal

Around town I only get about 240Miles. We have lots of hills.

My Gas gauge is on empty around 13 Gal.
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  #5  
Old 07-20-2006, 04:18 AM
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what octane are you running? should be premium don't forget.

I'm averaging 350 miles to the tank when the needle hits the "E" line...and normally when I fill up, I only get 12.5 gals...which means I still have more gas in the tank.
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  #6  
Old 07-20-2006, 05:43 AM
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Quote:
Originally Posted by disbo
Hi, I shot a note out last week about my gas gauge not going to full and hitting the E dash at around 200 miles. An 18 gallon tank I should get 350ish. I have a 5 speed so I should get a bit better than the standard 18-25 MPG???

What miles per tank do yall get?
At what point the goofy SVX gauge hits "E" is irrelevant. The question is, how much gas does the car hold with the gauge reading empty? Punch the trip odometer at every fill-up and use elapsed mileage as your backup fuel gauge.

I doubt you'll improve much on 18-25 MPG, even with a stick. I've gotten over 30 freeway MPG on two occasions in the past year... but my daily average is around 21, and I've seen as low as 16+.

dcb
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  #7  
Old 07-20-2006, 11:13 AM
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Quote:
Originally Posted by dcarrb
I doubt you'll improve much on 18-25 MPG, even with a stick. I've gotten over 30 freeway MPG on two occasions in the past year... but my daily average is around 21, and I've seen as low as 16+.
My highway MPG stayed the same (even with higher RPM's) but my city MPG went up noticably with the 5MT.

Oh, you should be able to get over 500 miles on a tank all highway. I routinely get over 350 per tank mixed.
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  #8  
Old 07-20-2006, 06:56 PM
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I ran mine out of gas once and filled it up to the top with 17.99 gallons.

You should be able to get at least 400 highway miles out of a tank before the gas light comes on.
mixed - like David said - about 350
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  #9  
Old 07-20-2006, 07:56 PM
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Quote:
Originally Posted by ShiuludeSVX
I guess the saddle tank is the problem, and it seems that if you run the tank as deep as you can stand before filling it, then it gets more accurate.
I noticed this with mine as well. When I purchased the car the needle would be on E when i had driven around 200 miles, and I would fill up with much less then 18.5 gallons. The gas light even came on too. But it seems if I drive farther on each tank then my needle will stay up longer. Now I can get well over 300 miles before it hits the E. But I can still drive >80 miles after the gas light turns on, then go fill up and only get 16 gallons.

At least this way I know that I won't ever run out of gas, even if I drive a long way with the gas light on.
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  #10  
Old 07-20-2006, 08:26 PM
disbo disbo is offline
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Sounds like I shouldnt sweat it...

Thanks for all the info guys. Ill still be nervous kicking it past the E mark but Ill put a gallon of gas in the trunk and see what happens. Any body got a clue about how much a new sending unit is?? thanks Chris
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  #11  
Old 07-20-2006, 08:39 PM
Ron Mummert Ron Mummert is offline
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Any body got a clue about how much a new sending unit is?? thanks Chris[/QUOTE]


From past posts on the subject, I believe goofy gas gauge syndrome is the result of the tank float that absorbs gasoline, gets heavy, & sags. The sending unit isn't at fault.

Ron.
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  #12  
Old 07-20-2006, 08:39 PM
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Mmm. It is sort of like trainning the Fuel Gauge. Maybe I should wait once for the Fuel light to come on and then it will take longer to hit the E Spot.
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  #13  
Old 07-20-2006, 09:37 PM
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Quote:
Originally Posted by US to CDN SVX
Mmm. It is sort of like trainning the Fuel Gauge. Maybe I should wait once for the Fuel light to come on and then it will take longer to hit the E Spot.
Like I said, the deeper you run it, the more accurate it will become.
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  #14  
Old 07-20-2006, 09:53 PM
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Sweet. E Spot here I come.....
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  #15  
Old 07-21-2006, 10:30 AM
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I've had similar experiences with the E spot. Now I don't wait to hit the E spot but instead fill every week. On another note when I fill to the top the gauge stops right on the F spot every time. Before it used to pass the F spot. I guess the float is getting soaked.
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