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greall
Ricer
Joined: 22 Jun 2008
Tech posts: 16
Location: La Romain
My 2NRide:
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 Posted: Wed Nov 04, 2009 10:26 pm
Post subject: Which is better:fill when half or empty? |
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Which is more feasible:a fuel fill up when your tank's half empty or fully empty?
Greg
Last edited by greall on Thu Nov 05, 2009 8:45 am; edited 1 time in total |
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Midnight_Demon
30 pounds of Boost
Joined: 09 Apr 2008
Tech posts: 2587
Location: Riding yuh bumpa
My 2NRide: Nissan R33 GTR
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Posted: Thu Nov 05, 2009 7:36 am
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| it depends on if u have enough money in ur pocket to full from half or empty .... |
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THE SYNDICATE
TriniTuner 24-7
Joined: 13 Feb 2007
Tech posts: 1804
Location: Drowning My Sorrows With a Cold HEINEKEN....
My 2NRide: Nissan B12 Sentra
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Posted: Thu Nov 05, 2009 7:52 am
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i prefer when it's half empty......when the tanks full empty, the pump is prone to pullin any dregs(don't know if that's the correct word) etc. from the tank and that could contaminate the in tank fuel filter!
My $0.02 |
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Turbo
Chronic 2NR
Joined: 14 Mar 2006
Tech posts: 946
Location: all over, west, east, south & north..............always on the move
My 2NRide:
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Posted: Thu Nov 05, 2009 8:18 am
Post subject: |
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| THE SYNDICATE wrote: | i prefer when it's half empty......when the tanks full empty, the pump is prone to pullin any dregs(don't know if that's the correct word) etc. from the tank and that could contaminate the in tank fuel filter!
My $0.02 |
 ................great desciption dey, yuh cyah get any better than dat
yea greall exactly dat |
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greall
Ricer
Joined: 22 Jun 2008
Tech posts: 16
Location: La Romain
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Posted: Thu Nov 05, 2009 8:47 am
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Hmmm...thanks for the responses so far...
Greg |
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W2J
3NE 2NR Power Seller
Joined: 17 Apr 2003
Tech posts: 2109
Location: Trinidad
My 2NRide:
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Posted: Sun Nov 08, 2009 11:25 pm
Post subject: |
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| Turbo wrote: | | THE SYNDICATE wrote: | i prefer when it's half empty......when the tanks full empty, the pump is prone to pullin any dregs(don't know if that's the correct word) etc. from the tank and that could contaminate the in tank fuel filter!
My $0.02 |
................great desciption dey, yuh cyah get any better than dat
yea greall exactly dat |
how so the pump have hydraulics  always taught it was mounted in a fix position and sucks from the bottom of the tank. |
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d spike
Street 2NR
Joined: 04 Aug 2009
Tech posts: 59
My 2NRide: Vauxhall Viva
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Posted: Mon Nov 09, 2009 1:09 am
Post subject: Re: Which is better:fill when half or empty? |
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| greall wrote: | Which is more feasible:a fuel fill up when your tank's half empty or fully empty?
Greg |
It is barely feasible to fill up when your tank is quite empty (I won't even dream on commenting on "fully empty" ) unless you run out of gas as you reach the pump (or push auto to station)...
Seriously, the advice given above is as good as it is old - sediment settles in your tank, and "draining it to the lees" often pulls these buggers into your line. Besides, topping up instead of filling up saves gas by allowing less room for evaporation (gas fumes).
Last edited by d spike on Mon Nov 09, 2009 8:09 am; edited 1 time in total |
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sigma-turbo
3NE 2NR for life
Joined: 06 May 2009
Tech posts: 179
Location: Australia
My 2NRide:
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Posted: Mon Nov 09, 2009 3:21 am
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the worst time for getting particles in the fuel system is just after filling as the filling process stirs up anything that may be in the tank regardless of whether its half full or near empty, even driving stirs up any sediment
oem fuel pumps/pickups do not feed off the bottom of the tank, maybe in the dark ages but not these days
I go through 65l of fuel every day I fill up when my light comes on and never get a problem with excessive particles in my fuel filters, though maybe it just dont get a chance to build up |
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d spike
Street 2NR
Joined: 04 Aug 2009
Tech posts: 59
My 2NRide: Vauxhall Viva
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Posted: Mon Nov 09, 2009 8:36 am
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| sigma-turbo wrote: | the worst time for getting particles in the fuel system is just after filling as the filling process stirs up anything that may be in the tank regardless of whether its half full or near empty, even driving stirs up any sediment
oem fuel pumps/pickups do not feed off the bottom of the tank, maybe in the dark ages but not these days
I go through 65l of fuel every day I fill up when my light comes on and never get a problem with excessive particles in my fuel filters, though maybe it just dont get a chance to build up |
I'm not sure what sediment you are referring to, but a common complaint in older cars is deterioration of the tank wall - causing a build up of rust particles in the tank. These settle to the bottom and hardly move - it can even "cake up" there. The smaller particles that do move get drawn into the line and caught in the filter. Washing out the tank solves this problem.
Not washing out your tank coupled with running a low gas level encourages a higher level of mobile sediment to move into your intake line. This causes your fuel filter to clog. (Frequent fuel filter change is just bandaging the sore, it's a symptom of a tank in need of cleaning.)
The mere fact that your car has a 'low fuel' light suggests that it doesn't fall into this category of vehicles. (At this point, MG will undoubtedly mention some ancient European artifact of a car that had a light bulb that lit up when fuel ran low and was operated by some simple but ingenious device in the tank that made the car highly dangerous to drive for lengthy distances. )
There is also the problem of fuel sediment (and water) from the ground tanks in gas stations - hence the reason why you shouldn't fill up soon after the tanker offloads fuel. |
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~˜VëgŲ˜~
3NE 2NR Moderator
Joined: 18 Apr 2003
Tech posts: 33559
Location: Searching for the I
My 2NRide: Nissan 230JK
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Posted: Mon Nov 09, 2009 10:55 am
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sediments???? in the 5+years I've had my last car, just before selling I had to pull out the fuel pump and from there was able to get a very good view as per the interior of the tank.......there were absolutely NO deposits or anything of the sort anywhere within the tank (there was barely any fuel in tank which made visibility easy).....the fuel pump filter was also clean and in all the previuos filter changes there was never an issue of clogged filter....flow was still good.....but changed due to issue of service intervals with a mixture of paranoia........
usually the service stations would have an in-line filter which ought to take care of any storage tank deposits.........
So agreed that sediments may usually come from the degradation of one's own fuel tank.......
This is from my experience...... |
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d spike
Street 2NR
Joined: 04 Aug 2009
Tech posts: 59
My 2NRide: Vauxhall Viva
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Posted: Mon Nov 09, 2009 12:01 pm
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| 5+ years? Good grief, I am talking about cars that are 20+ years... Now I feel old... (picks up walking-stick and heads slowly out the door...) |
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~˜VëgŲ˜~
3NE 2NR Moderator
Joined: 18 Apr 2003
Tech posts: 33559
Location: Searching for the I
My 2NRide: Nissan 230JK
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Posted: Tue Nov 10, 2009 11:39 pm
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| ^^^lol, no man I agree with everything you stated.......was just trying to add in terms of persons with newer cars tend to think the tank's gonna be dirty etc etc.......and that 5+ years was with my last car......not all the others before that...lol....I old too.... |
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MG Man
2NRholic
Joined: 01 May 2003
Tech posts: 4654
Location: Liming in the idiot section
My 2NRide:
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Posted: Tue Nov 10, 2009 11:41 pm
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I usually siphon gas into my takn using a hose with a filter in-line
and it traps sediments, so I reckon everybody tank has sediments |
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3stagevtec
punchin NOS
Joined: 12 Jul 2006
Tech posts: 4477
Location: killing two stones with one bird...
My 2NRide: Suzuki Grand Vitara
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Posted: Wed Nov 11, 2009 1:16 am
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when i pulled my tank in my 10 year old Vitara last year, i didn't find any sediments!
sediments aside, wouldn't it be better to fill from 'empty to 1/2 tank always' vs '1/2 tank to full'?? if you always keep your tank under the 1/2 mark, you will be carrying around less weight in your vehicle.. which should impact on fuel economy...
1 liter of gas weights approx 0.76Kg or 1.68lbs.. half of a typical 50 liter tank would weight 42lbs.. driving around with an unnecessary extra 42lbs might add up in the long run.. |
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sigma-turbo
3NE 2NR for life
Joined: 06 May 2009
Tech posts: 179
Location: Australia
My 2NRide:
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Posted: Wed Nov 11, 2009 2:41 am
Post subject: |
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| d spike wrote: | | sigma-turbo wrote: | the worst time for getting particles in the fuel system is just after filling as the filling process stirs up anything that may be in the tank regardless of whether its half full or near empty, even driving stirs up any sediment
oem fuel pumps/pickups do not feed off the bottom of the tank, maybe in the dark ages but not these days
I go through 65l of fuel every day I fill up when my light comes on and never get a problem with excessive particles in my fuel filters, though maybe it just dont get a chance to build up |
I'm not sure what sediment you are referring to, but a common complaint in older cars is deterioration of the tank wall - causing a build up of rust particles in the tank. These settle to the bottom and hardly move - it can even "cake up" there. The smaller particles that do move get drawn into the line and caught in the filter. Washing out the tank solves this problem.
Not washing out your tank coupled with running a low gas level encourages a higher level of mobile sediment to move into your intake line. This causes your fuel filter to clog. (Frequent fuel filter change is just bandaging the sore, it's a symptom of a tank in need of cleaning.)
The mere fact that your car has a 'low fuel' light suggests that it doesn't fall into this category of vehicles. (At this point, MG will undoubtedly mention some ancient European artifact of a car that had a light bulb that lit up when fuel ran low and was operated by some simple but ingenious device in the tank that made the car highly dangerous to drive for lengthy distances. )
There is also the problem of fuel sediment (and water) from the ground tanks in gas stations - hence the reason why you shouldn't fill up soon after the tanker offloads fuel. |
basically referring to anything that may be in the tank |
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crazybalhead
punchin NOS
Joined: 21 Apr 2003
Tech posts: 3570
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Posted: Wed Nov 11, 2009 3:02 pm
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I always fill up from almost empty. It makes no sense to keep filling up half tank. Then why have a tank that size in the first place? Is gas staations yuh like?
Also, when you keep filling from half, the level sensor may start to stick and give problems.
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azlan
Street 2NR
Joined: 20 Aug 2009
Tech posts: 38
Location: Trinidad
My 2NRide:
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Posted: Fri Nov 13, 2009 9:40 am
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| iF i WANT TO CHANGE FROM SUPER TO PREMIUM, WHAT DO YOU SUGGEST? wAIT TILL ITS EMPTY OR FILL FROM HALF? |
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3stagevtec
punchin NOS
Joined: 12 Jul 2006
Tech posts: 4477
Location: killing two stones with one bird...
My 2NRide: Suzuki Grand Vitara
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Posted: Fri Nov 13, 2009 10:29 am
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| azlan wrote: | | iF i WANT TO CHANGE FROM SUPER TO PREMIUM, WHAT DO YOU SUGGEST? wAIT TILL ITS EMPTY OR FILL FROM HALF? |
fill from half first and see how your engine reacts to it.. then go full super and check again.. |
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azlan
Street 2NR
Joined: 20 Aug 2009
Tech posts: 38
Location: Trinidad
My 2NRide:
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Posted: Fri Nov 13, 2009 10:47 am
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| Remember I am changing FROM super TO Premium. I have a Toyota Fielder..... I find the performance of the car is not up to par.. so I say I will try premium and see if that makes a difference. |
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d spike
Street 2NR
Joined: 04 Aug 2009
Tech posts: 59
My 2NRide: Vauxhall Viva
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Posted: Fri Nov 13, 2009 10:08 pm
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To actually see a difference in order to compare results, you would have to empty your tank and then refill with the new fuel - but I think you've figured this out already...  |
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