Does diesel fuel go stale in a month?

**Walter** · October 8th, 2013 07:06 PM

Is it better to refuel weekly as opposed to doing it monthly? This is assuming you only use up 1 full tank monthly. The reason being you get fresher diesel fuel.

Is it also better refuel when tank is near empty or below 1/4 level so you'll have more fresh fuel? Rather than mix old fuel with new ones?

**yebo** · October 8th, 2013 08:19 PM

Diesel does not go stale but there is a chance of bacterial and fungi growth in the tank that can cause the filter to clog up. This is of course a concern only if you fill up from a station that is prone to floods, or get their fuel from illegal sources (e.g., smuggled diesel from tankers because this fuel is transported using barges with dirty tanks or even have sea water in them). Fortunately for most stations this is not the case. So for as long as you fill up from the better stations then you can keep that diesel in the tank for even a year with no concerns.

in case you just need to be sure there are additives that kill bacteria and fungi in diesel. I think i saw 1 before at handyman.

**glenn manikis** · October 8th, 2013 08:26 PM

as per our experience sa ibang gensets namin... pag tumagal ang diesel fuel for at least 3-4months... parang nag seseperate yung diesel at bio diesel...

parang coconut like....

kaya we recommend sa mga clients namin na to change diesel every 2-3 months...

drain then palitan nalang nila ng bago... tapos yung diesel eh gamitin nalang nila sa ibang bagay....

**brainmafia_310** · October 8th, 2013 09:37 PM

Originally Posted by glenn manikis

as per our experience sa ibang gensets namin... pag tumagal ang diesel fuel for at least 3-4months... parang nag seseperate yung diesel at bio diesel...

parang coconut like....

kaya we recommend sa mga clients namin na to change diesel every 2-3 months...

drain then palitan nalang nila ng bago... tapos yung diesel eh gamitin nalang nila sa ibang bagay....

pwede din haluin nalang yung diesel kung madami masyado.

normally our GS have like 2 x 18k liters tank. so on a regular basis we recirculate the diesel so that the item above will not happen.

**Retz** · October 8th, 2013 09:48 PM

I always make it a habit to refill diesel if it is half empty or 1/4 tank full at the very least to avoid contamination. Nasa ilalim kasi ng diesel tank mga sludge.

**lowslowbenz** · October 9th, 2013 12:07 PM

Originally Posted by yebo

in case you just need to be sure there are additives that kill bacteria and fungi in diesel. I think i saw 1 before at handyman.

OT:

Biocides, I'm looking for those too. Our concern dati is diesel fuel stored in the tanks of a yacht.

BTT:

Diesel won't go stale in a month or two.

**JohnM** · October 9th, 2013 12:17 PM

Originally Posted by lowslowbenz

OT:

Biocides, I'm looking for those too. Our concern dati is diesel fuel stored in the tanks of a yacht.

BTT:

Diesel won't go stale in a month or two.

I have a contact in HK who sells these to Chinese mining companies. He's looking for a distributor here.

**lowslowbenz** · October 9th, 2013 12:37 PM

^

Can he sell on retail basis?

**JohnM** · October 9th, 2013 12:38 PM

Originally Posted by lowslowbenz

^

Can he sell on retail basis?

Shipping will kill you

Give me an idea of how many CCs you need and I'll contact him.

**ghosthunter** · October 9th, 2013 01:00 PM

Originally Posted by glenn manikis

as per our experience sa ibang gensets namin... pag tumagal ang diesel fuel for at least 3-4months... parang nag seseperate yung diesel at bio diesel...

parang coconut like....

kaya we recommend sa mga clients namin na to change diesel every 2-3 months...

drain then palitan nalang nila ng bago... tapos yung diesel eh gamitin nalang nila sa ibang bagay....

You can thank PGMA and her approval of the CLEAN AIR LAW... ironically which still lets petrochem companies sell euro2/3 diesel fuels and not the cleaner euro4 standard fuels.