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V8 fill up

6K views 23 replies 17 participants last post by  NetworkTV 
#1 ·
Quick question V8 owners. Let my truck go to 1 dash above E. Filled it up and it only took 18.5 gallons and it was showing full. Any other v8 owners recall the accuracy of the fuel gauge? I set the trip on this fill up to see what it shows when it goes to E next time. Kind of confused as it should have a 24 gallon tank with an additional 7.5 gallons for the V8. Was expecting to be little over 3/4 with 18 gallons not full considering it should take close to 30 gallons.
 
#6 ·
The EVIC isn't the most accurate on DTE either. Just as soon as my light comes on it will say 34 miles to empty. Then another mile down the road it goes to 0 miles to empty. I am use to cars that are pretty accurate or at least once they start the count down to empty it calculates correctly. I have learned with the light on I am ok and have around 3-4 gallons left.
 
#8 ·
I have had mine get low low enough for the "Low Fuel" warning to light up and ding once, and I filled it within 2 miles after that, and it took about 21.6 gallons to refill it. The Jeep web site says that it has a 24.6 gallon tank, and the owner's manual says 24 "gallons (approximate)", so I figure I had at least 35 miles, even with stop-and-go driving conditions, before I was really in trouble.
 
#10 ·
I let the DTE tell me I had 2 miles to go and filled it up with 21 gallons. Maybe the fuel pump in the tank takes up ~3 gallons of gas space. :) I usually fill up within a few miles of the the DTE telling me I have 40 miles to go and it has never been even close to the same amount of gas. Sometimes it takes 17 gallons and sometimes it takes 20 gallons even though it all says 40 more miles to empty.

It probably calculates DTE on the fuel mileage from the EVIC but mine is pretty consistent at 11.5 MPG for the past few weeks and it is still all over the place. My Fusion is dead on with the readings, when it says I have 20 miles left (which is my average gas mileage on the dash) I fill up and it is right on 16.5 gallons (the tank is 17.5).

Oh well, I know to fill up earlier than later with the Jeep because of the sloppy calculations it makes. :)
 
#11 ·
Your evic reads all the way down to 0? awesome. wish mine did that. first fuel light comes on w/ about 45-50 miles left. EVIC DTE counts down to about 25-35 miles left when the second chime and "LOW FUEL" pops up. Then on DTE all it says is Low Fuel. I really dislike this. I have about 30 miles left so about 1.5 gallons left. and I still only fill up with about 22 gallons. oh well.
 
#13 ·
A couple of times I took it to the last hash mark on "E" and, on those few occasions, when I filled up I put in a bit more than 23 gallons.

It isn't good to run a tank too low because the fuel keeps the internal fuel pump cool; running too low too often and for too long a duration lets that pump heat up too much and reduces its service life. The reason I ran low on a few occasions was due to driving cross country late at night and many fuel stations were closed.
 
#14 ·
a friend of mine never has more than 1/4 tank of gas in his car. He just goes and puts a few dollars in to get him to work and back (I know, it's weird :) ). He has gone through fuel pumps on all of his cars and I keep telling him it is because of heat but he doesn't believe me. I remember replacing a fuel pump in an old 92 taurus SHO I had but not since then, they are pretty reliable. I don't know if the heat thing is true or not but it sure seems like it would be.
 
#17 ·
I agree with Bmwister. I RARELY run my tank below the 1/4 full mark. and I always fill it up. Especially in the winter, I try to fill up at just below 1/2 tank.

As being someone who has actually run out of gas before (1990 honda civic hatchback, stopped dead at 420 miles in the middle of the night 2 miles from a station, so it got 42 MPG exactly). I do not take pleasure in playing this risky game. And I have also heard about the lack of fuel in the tank damaging the pumps.
 
#18 ·
Yep, 24.6 gallons according to my guide. I never let mine go below 1/4 empty as not only can that heat-damage the fuel pump but there may be impurities at the bottom of the tank that could be picked up. Never have seen the 'E' appear.

Dan
 
#19 ·
Yep, 24.6 gallons according to my guide. I never let mine go below 1/4 empty as not only can that heat-damage the fuel pump but there may be impurities at the bottom of the tank that could be picked up. Never have seen the 'E' appear.

Dan
Regarding what I highlighted, does the fuel pickup in the tank float so that it takes fuel off the top? I always, without giving it much thought, figured the pickup was at the bottom of the tank in a fixed position.

Anybody know, for sure, or does it vary among manufacturers?


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