MikeT 90 C4sixer

So just how accurate are these digital gages in a C4? My reserve light comes on at about 2-3 bars left, but the range button says i have over 100 miles. I did notice the reserve light going off depending on if i go up or down a hill. I dont want to push it, but it does have a 20 gal tank. I think my trip meter shows around 270 miles. I just havent had this car that long to really judge it.
Mike

AirForceOne!

Not very accurate at all! My 90 comes down one bar after I burn 6 gallons. I always keep mine full just incase. Running it out of fuel isn't good for it I heard.

FASTAZU

I fill mine at 1/4 tank..I siphoned mine out and refilled it 1 gallon at a time, (to adj the level arm it was hanging against the inside of the tank) the lower bars were about a gallon each the upper bars 2-3 gallons each.

RollaMo-LT4

I just don't understand why some have to try and "push the limits" on any fuel gauge.
It costs the same to run around on a full tank of fuel as it does on an empty tank.

Once that fuel light comes on, you better be looking for a nearby gas station unless you like walking.

MikeT 90 C4sixer

LOL, well my last fill up was a month ago, 280 miles on tank, reserve lite on, and i only put in 17.225 gal. I just dont like going to gas stations that often. I will fill up again in the am on way to work.

FASTAZU

On another note your fuel pump needs the fuel to stay cool...

gerardvg

Funny how fuel pumps die when you have one or two bars left,

I have adjusted my fuel sender to show 0 bars and still have a couple of litres left, generally the fuel gauge is very accurate however if the connector plug does not have a good connection it can suddenly drop or rise without warning. I always reset the trip odometer and go via miles traveled i know what she will do on a highway, i tend to fill up when i have half or a quarter of a tank left.

(if you have a good roadside assistance policy well you can risk it), but being stuck on the side of a highway with high speed traffic is not on my like list there are so many sleepy,drugged,drunk drivers out there.

Firewalker11

Agreed! My dad always told me to never go below half a tank for two reasons. One, so you never have to walk! Two, so the sediment usually located in the bottom of the tank doesn't ruin your fuel pump $.

I always took his advice and so far, so good.

MikeT 90 C4sixer

If you do that, then you ALWAYS have old fuel in your tank. today's gasoline goes bad after 2-3 weeks of just sitting around. I like to have a fresh tank of fuel in car. But these cars dont get driven that much.

Today went to work, and when i was going down hill, gage went back up to 3 bars and reserve lite went off. On level it was 2 bars and reserve lite on. Filled up, took 17.626 gal. So as long as i hit the fuel station shortly after the lite comes on, i think i am ok.

RollaMo-LT4

You need to find better gas stations.

HGUNHNTR

Stabil Marine formula goes into every tank I buy. I keep it above three quarters of a tank as much as possible, and I don't care if it sits a while.

MikeT 90 C4sixer

That Stabil Marine stuff is good. But expensive. At least it treats alot of fuel. I treat all my 5 gal jugs with that, for my small engine machines. I try to use Star-tron in my autos every time i fill up.
You need to get the ratios correct.

Frizlefrak

This place just keeps getting better.

ThePhoneGuy

I find it helpful to reset the "fuel" button on the dash at each fillup. It says to do this in the owners manual. My guage is much more accurate when I do this.

70ZZ3 96LT4

Agree with you. I have let my 96 LT4 sit for many months raised on the lift between driving trips. Last trip was couple months ago, fill it up and let it sit until the next trip. 45K on it driven like this since I bought it new. Have never used a gas treatment.

ccrazor

If you believe that, I have a bridge and some prime swamp land I can sell you..

Frizlefrak

But beware of crocs.

SunCr

GM wasn't stupid and once your Gage hits Reserve, Range switches to Miles since Reserve. No one is going to predict how much further it can go and risk having you butt ended by some semi when it doesn't make it. Of course there may be an App or two that you can download to your Cell for better Accuracy on mileage and range and Delphi now offers a Standalone "OnSTar" which includes a ton of stuff including Diagnostics, but you'll need an OB2 system to adapt it.

MikeT 90 C4sixer

Do a google search on the subject. I have read many articles on it. Todays gas is junk. But i do run the premium fuels in my hot rods. That is the best i can ask for.

MikeT 90 C4sixer

Of course i do this. and reset the trip meter so i know the miles driven. Today, after driving with tank full, noticed the upper bars are thicker than the lower. Makes sense, more gas at top of the tank than lower. now just have to watch the bars and see if they change as it goes down.