Zotto

"Matt Whiting" <whiting@epix.net> ha scritto nel messaggio
news:044eg.9084$lb.822737@news1.epix.net...

>... Do they really believe that the fuel pickup, which is located near the
>bottom of the tank, knows how much fuel is above it and thus will only pick
>up sediment from the bottom when the fuel level is low? Reading this sort
>of stuff is a hoot.
>

May be the point is that if you run with very few gasoline the pump could in
some moments to have cavitation picking up air bubbles instead of gasoline
and this is not good for lubrication inside the pump itself.
I have LPG on my Sonata and the LPG manifacturer recommends to keep in
gasoline tank at least 1/4 of capacity, even if I could run my engine
without any gasoline, using LPG.



--
Zotto V6 Sonica driver
http://www.g2kweb.it/gigio2k/gallery...to/Zottomobile

Matt Whiting

Zotto wrote:
> "Matt Whiting" <whiting@epix.net> ha scritto nel messaggio
> news:044eg.9084$lb.822737@news1.epix.net...
>
>
>>... Do they really believe that the fuel pickup, which is located near the
>>bottom of the tank, knows how much fuel is above it and thus will only pick
>>up sediment from the bottom when the fuel level is low? Reading this sort
>>of stuff is a hoot.
>>
>
>
> May be the point is that if you run with very few gasoline the pump could in
> some moments to have cavitation picking up air bubbles instead of gasoline
> and this is not good for lubrication inside the pump itself.
> I have LPG on my Sonata and the LPG manifacturer recommends to keep in
> gasoline tank at least 1/4 of capacity, even if I could run my engine
> without any gasoline, using LPG.

I'm not familiar with LPG systems so I have no idea why that
recommendation. I just spent an hour reviewing the fuel system section
in the Sonata shop manual (official Hyunday manual set) and there is no
mention of keeping any minimum amount of fuel in the tank.

Matt

Matt Whiting

Zotto wrote:
> "Matt Whiting" <whiting@epix.net> ha scritto nel messaggio
> news:044eg.9084$lb.822737@news1.epix.net...
>
>
>>... Do they really believe that the fuel pickup, which is located near the
>>bottom of the tank, knows how much fuel is above it and thus will only pick
>>up sediment from the bottom when the fuel level is low? Reading this sort
>>of stuff is a hoot.
>>
>
>
> May be the point is that if you run with very few gasoline the pump could in
> some moments to have cavitation picking up air bubbles instead of gasoline
> and this is not good for lubrication inside the pump itself.
> I have LPG on my Sonata and the LPG manifacturer recommends to keep in
> gasoline tank at least 1/4 of capacity, even if I could run my engine
> without any gasoline, using LPG.

I'm not familiar with LPG systems so I have no idea why that
recommendation. I just spent an hour reviewing the fuel system section
in the Sonata shop manual (official Hyunday manual set) and there is no
mention of keeping any minimum amount of fuel in the tank.

Matt

Matt Whiting

Zotto wrote:
> "Matt Whiting" <whiting@epix.net> ha scritto nel messaggio
> news:044eg.9084$lb.822737@news1.epix.net...
>
>
>>... Do they really believe that the fuel pickup, which is located near the
>>bottom of the tank, knows how much fuel is above it and thus will only pick
>>up sediment from the bottom when the fuel level is low? Reading this sort
>>of stuff is a hoot.
>>
>
>
> May be the point is that if you run with very few gasoline the pump could in
> some moments to have cavitation picking up air bubbles instead of gasoline
> and this is not good for lubrication inside the pump itself.
> I have LPG on my Sonata and the LPG manifacturer recommends to keep in
> gasoline tank at least 1/4 of capacity, even if I could run my engine
> without any gasoline, using LPG.

I'm not familiar with LPG systems so I have no idea why that
recommendation. I just spent an hour reviewing the fuel system section
in the Sonata shop manual (official Hyunday manual set) and there is no
mention of keeping any minimum amount of fuel in the tank.

Matt

Zotto

Made a search in google about the topic:

http://ezinearticles.com/?Top-Ten-Re...hicles&id=3035


Zotto

Zotto

Made a search in google about the topic:

http://ezinearticles.com/?Top-Ten-Re...hicles&id=3035


Zotto

Zotto

Made a search in google about the topic:

http://ezinearticles.com/?Top-Ten-Re...hicles&id=3035


Zotto

Matt Whiting

Zotto wrote:
> Made a search in google about the topic:
>
> http://ezinearticles.com/?Top-Ten-Re...hicles&id=3035

Remember, I specifically said credible sources. This is just another
person passing on the old wives tale. And even the grammar in this is
atrocious. I'm guessing this guy didn't make it past 8th grade.

I really like the "running completely out of fuel running out of fuel
allows the electric fuel pump to run "dry" which nearly immediately
ruins the pump." comment. I've run my Chevy pickup completely dry
several times (I used to carry a 50 gallon tank in the back to refuel my
airplane, so I always had gas available handily). My truck has nearly
100K miles on the original fuel pump. So much for the "immediately
ruins the pump" theory.


Matt

Matt Whiting

Zotto wrote:
> Made a search in google about the topic:
>
> http://ezinearticles.com/?Top-Ten-Re...hicles&id=3035

Remember, I specifically said credible sources. This is just another
person passing on the old wives tale. And even the grammar in this is
atrocious. I'm guessing this guy didn't make it past 8th grade.

I really like the "running completely out of fuel running out of fuel
allows the electric fuel pump to run "dry" which nearly immediately
ruins the pump." comment. I've run my Chevy pickup completely dry
several times (I used to carry a 50 gallon tank in the back to refuel my
airplane, so I always had gas available handily). My truck has nearly
100K miles on the original fuel pump. So much for the "immediately
ruins the pump" theory.


Matt

Matt Whiting

Zotto wrote:
> Made a search in google about the topic:
>
> http://ezinearticles.com/?Top-Ten-Re...hicles&id=3035

Remember, I specifically said credible sources. This is just another
person passing on the old wives tale. And even the grammar in this is
atrocious. I'm guessing this guy didn't make it past 8th grade.

I really like the "running completely out of fuel running out of fuel
allows the electric fuel pump to run "dry" which nearly immediately
ruins the pump." comment. I've run my Chevy pickup completely dry
several times (I used to carry a 50 gallon tank in the back to refuel my
airplane, so I always had gas available handily). My truck has nearly
100K miles on the original fuel pump. So much for the "immediately
ruins the pump" theory.


Matt

Mike Marlow

"Matt Whiting" <whiting@epix.net> wrote in message
news:vc4eg.9085$lb.822615@news1.epix.net...

> I'm still looking for some credible evidence that this is true.
> Credible, means it doesn't come from AAA, or your brother-in-law, etc.
> If it comes from a fuel pump manufacturer, fuel pump designer, car
> maker, etc., I'd consider that reasonably credible. I've never yet
> seen anything for any vehicle I've owned and, in fact, have some
> evidence to the contrary. Admittedly, not a lot of evidence, but some.

That I cannot provide. Like you I dismiss the AAA suggestions and all of
the other completely unfounded stuff and do look for some credibility, or
some other assurance that the story is coming from a source that I can
trust. For the most part, I've been hearing this for a while now within the
auto-repair circles. From folks dealing with this stuff every day. I've
never heard a design engineer state it, or the manufacturer themselves, but
it is a concept that at least makes sense.

>
> First evidence is that I routinely run my vehicles down below 1/4 tank
> or occasionally until the low fuel light comes on. I've run several
> cars over 100K miles and have had only ONE electric fuel pump failure.
> That was on a 96 Plymouth Grand Voyager that had in the neighborhood of
> 150,000 miles at the time of failure.

I've had a couple of GM pump failures. Like you, my cars stay in the family
for a long time. My failures have generally been upwards of 100,000 miles.
I make it a practice to keep 1/4 tank full but that's a longstanding habit
and a reflection of where I live. We are subject to condensation in the
tank and ice in the winter. Dry gas fixes this, but so does keeping a
sufficient level in the tank.

>
> Second evidence comes from a guy who was a fuel pump designer for a
> number of years and said that the fuel pumps are cooled by the gas they
> are pumping (they pump the gas around the electric motor typically), not
> the gas around them in the tank.

Actually - that does make a great deal of sense.

--

-Mike-
mmarlowREMOVE@alltel.net

Mike Marlow

"Matt Whiting" <whiting@epix.net> wrote in message
news:vc4eg.9085$lb.822615@news1.epix.net...

> I'm still looking for some credible evidence that this is true.
> Credible, means it doesn't come from AAA, or your brother-in-law, etc.
> If it comes from a fuel pump manufacturer, fuel pump designer, car
> maker, etc., I'd consider that reasonably credible. I've never yet
> seen anything for any vehicle I've owned and, in fact, have some
> evidence to the contrary. Admittedly, not a lot of evidence, but some.

That I cannot provide. Like you I dismiss the AAA suggestions and all of
the other completely unfounded stuff and do look for some credibility, or
some other assurance that the story is coming from a source that I can
trust. For the most part, I've been hearing this for a while now within the
auto-repair circles. From folks dealing with this stuff every day. I've
never heard a design engineer state it, or the manufacturer themselves, but
it is a concept that at least makes sense.

>
> First evidence is that I routinely run my vehicles down below 1/4 tank
> or occasionally until the low fuel light comes on. I've run several
> cars over 100K miles and have had only ONE electric fuel pump failure.
> That was on a 96 Plymouth Grand Voyager that had in the neighborhood of
> 150,000 miles at the time of failure.

I've had a couple of GM pump failures. Like you, my cars stay in the family
for a long time. My failures have generally been upwards of 100,000 miles.
I make it a practice to keep 1/4 tank full but that's a longstanding habit
and a reflection of where I live. We are subject to condensation in the
tank and ice in the winter. Dry gas fixes this, but so does keeping a
sufficient level in the tank.

>
> Second evidence comes from a guy who was a fuel pump designer for a
> number of years and said that the fuel pumps are cooled by the gas they
> are pumping (they pump the gas around the electric motor typically), not
> the gas around them in the tank.

Actually - that does make a great deal of sense.

--

-Mike-
mmarlowREMOVE@alltel.net

Mike Marlow

"Matt Whiting" <whiting@epix.net> wrote in message
news:vc4eg.9085$lb.822615@news1.epix.net...

> I'm still looking for some credible evidence that this is true.
> Credible, means it doesn't come from AAA, or your brother-in-law, etc.
> If it comes from a fuel pump manufacturer, fuel pump designer, car
> maker, etc., I'd consider that reasonably credible. I've never yet
> seen anything for any vehicle I've owned and, in fact, have some
> evidence to the contrary. Admittedly, not a lot of evidence, but some.

That I cannot provide. Like you I dismiss the AAA suggestions and all of
the other completely unfounded stuff and do look for some credibility, or
some other assurance that the story is coming from a source that I can
trust. For the most part, I've been hearing this for a while now within the
auto-repair circles. From folks dealing with this stuff every day. I've
never heard a design engineer state it, or the manufacturer themselves, but
it is a concept that at least makes sense.

>
> First evidence is that I routinely run my vehicles down below 1/4 tank
> or occasionally until the low fuel light comes on. I've run several
> cars over 100K miles and have had only ONE electric fuel pump failure.
> That was on a 96 Plymouth Grand Voyager that had in the neighborhood of
> 150,000 miles at the time of failure.

I've had a couple of GM pump failures. Like you, my cars stay in the family
for a long time. My failures have generally been upwards of 100,000 miles.
I make it a practice to keep 1/4 tank full but that's a longstanding habit
and a reflection of where I live. We are subject to condensation in the
tank and ice in the winter. Dry gas fixes this, but so does keeping a
sufficient level in the tank.

>
> Second evidence comes from a guy who was a fuel pump designer for a
> number of years and said that the fuel pumps are cooled by the gas they
> are pumping (they pump the gas around the electric motor typically), not
> the gas around them in the tank.

Actually - that does make a great deal of sense.

--

-Mike-
mmarlowREMOVE@alltel.net

Zotto

"Matt Whiting" <whiting@epix.net> ha scritto nel messaggio
news:Ma7eg.9091$lb.822743@news1.epix.net...
> Zotto wrote:

>So much for the "immediately ruins the pump" theory.
>
>
Better so, then. One thing less to be worried about

--
Zotto V6 Sonica driver
http://www.g2kweb.it/gigio2k/gallery...to/Zottomobile

Zotto

"Matt Whiting" <whiting@epix.net> ha scritto nel messaggio
news:Ma7eg.9091$lb.822743@news1.epix.net...
> Zotto wrote:

>So much for the "immediately ruins the pump" theory.
>
>
Better so, then. One thing less to be worried about

--
Zotto V6 Sonica driver
http://www.g2kweb.it/gigio2k/gallery...to/Zottomobile