Cannot b less than half tank?

[Jamstart]

I remember Tay Pin hui did a TVC for shell and he said do not wait till empty tank to topup to prevent rust!

This is crap. Rust occurs only in contact with water and oxygen. How can the tank inside get rust?

[Vidz]

best is to pump full always...

and not leave empty tank for too long

[Bighappyjer]

best is to pump full always...

and not leave empty tank for too long

 

So say the oil cartels, in order to make vehicles heavier, increase consumption and therefore increase sales.

[Kyojin]

what car are you driving that still has a metal tank?

 

steel tanks have been replaced by plastic ones in new cars since the mid-1980s... by the 90s, most cars would already be using plastic fuel tanks.

[Kyojin]

This is crap. Rust occurs only in contact with water and oxygen. How can the tank inside get rust?

 

sorry, but i have to point out that your explanation is the crappier one.

 

your fuel tank has water vapor in it. if left to stand still over long periods of time, this can cause steel tanks to rust from the inside.

[Maxus-MIFA9]

Folks,

 

just wana check wif u guys that is it true that is not advisable to wait till empty then we top up petrol.

 

Reason being the tank will oxidized n rust will form n in the end clog up n will ve to send engine for overhaul.

 

Sounds logical but Im not quite convinced as in the manufacturer shld know about tis n a better material shld b used for the fuel tank.

 

Can someone kind to clear my doubts?

 

Becos of tis issue, my friend who drive a cng car worries as he only keep 1/4 tank of petrol as standby when cng runs low.

 

He will try to clear the old petrol only once a mth and pump in new petrol n maintain 1/4 tank as standby again.

 

Basically he works and stay near a cng station thus he hardly uses petrol.

 

Another question is that is it alright for him to do in this way?

 

Thks.

Not true as there is a fuel filter to filter all inpurities out of the fuel ........

 

All you need is to maintain the fuel filter or change it every servicing ......

 

[Vidz]

So say the oil cartels, in order to make vehicles heavier, increase consumption and therefore increase sales.

 

not really. its common sense...

 

1. by filling full, you reduce the air pockets, when the fuel goes down, its vacumm instead of air

2. by not having empty tank for too long is to prevent fuel pump from either working too hard or gettin exposed where it should be submerged

 

if anyone is really so aginst the oil cartel, i suggest them to go all the way and change their mode of transport...

 

Edited October 19, 2010 by Vidz

[Kelpie]

Reason being the tank will oxidized n rust will form n in the end clog up n will ve to send engine for overhaul.

 

Still got modern cars using steel for petrol tank meh ?

 

Regards,

[Joseph22]

This is crap. Rust occurs only in contact with water and oxygen. How can the tank inside get rust?

 

 

can. if old car bah.

[Jpcc]

If daily travel is not much mileage, which is more recommended?

1) travel with full tank and affect fc (top up less and fill the tank up)

2) travel with near empty tank and water vapor invites rust (top up frequently and lighten the load for daily travel)

Edited October 19, 2010 by Jpcc

[Darthrevan]

If daily travel is not much mileage, which is more recommended?

1) travel with full tank and affect fc (top up less and fill the tank up)

2) travel with near empty tank and water vapor invites rust (top up frequently and lighten the load for daily travel)

 

if time is not of importance to u..u can always top up frequently..i feel that topping up full-tank saves my time..imagine going to petrol station and spending extra 5-10mins is just not productive..but thats just me

[Mini-itx2010]

Rust applies only to very old cars using steel tanks. Cars today are using plastic tanks instead. Hence no rust isues.

 

As for debris in the tank. Don't have to worry that much because all pumps have an additional pickup screen that prevents large particles from getting into the pump. As for small ones, there is fuel filter that filters the debris.

 

The main issue with 1/2 empty tank is condensation (not that big of a problem in SG though). Water vapour can condense and collect at the bottom of the tank. When that happens, you will need to pour in water removal (basically alcohol) to remove the water.

 

As for pump overheating. Don't have to worry too much either. When fuel flows thru the pump, it will cool the pump. It does not have to be submerged in fuel in order to keep it cool.