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+--- Thread: fuel temperature (/showthread.php?tid=1970)
fuel temperature - sugrmil - 11-14-2010
does anyone know what effect that fuel temperature has on horsepower or fuel consumption? Does anyone sell an adjustable fuel thermostat to accomplish this?
I have a Nissan 4WD with OM601 and am trying to improve it some. I am getting 34 (US) mpg now.
RE: fuel temperature - ForcedInduction - 11-15-2010
It has no effect at the temperatures yours will ever get to.
The only vehicles that can get fuel hot enough to cause problems are extreme pressure injection systems like unit injection and common rail. The hottest yours will get is 230*f of the oil system.
RE: fuel temperature - ben2go - 11-15-2010
Speaking of fuel temps.At what temp does diesel start to gel,37*F?
RE: fuel temperature - ForcedInduction - 11-15-2010
(11-15-2010, 03:00 PM)ben2go At what temp does diesel start to gel,37*F?
There is none. It varies a large amount depending on the mixture of additives and #1. Anywhere from 25* for average summer fuel to -60* or colder for the low-cetane arctic blends.
RE: fuel temperature - ben2go - 11-15-2010
Being that I live in the south east and we rarely get below freezing,do think we get winter blends for non commercial use?
RE: fuel temperature - ForcedInduction - 11-15-2010
They probably wait until November/December to switch over instead of October like they do around here.
RE: fuel temperature - ben2go - 11-16-2010
Quite possible.
RE: fuel temperature - winmutt - 11-17-2010
Nope, same switch over. Atleast here. I notice an instant performance decrease.
RE: fuel temperature - ForcedInduction - 11-17-2010
Thats the nice thing about using truck stops, the one I use clearly marks which pumps are #2 and which are winterized. That way for extended warm years like this one I can wait longer to switch over when I want.
RE: fuel temperature - ben2go - 11-17-2010
Our truck stop don't do that.I have a lot of them around me and I wish they would dot,cause that's where I refuel.
RE: fuel temperature - Alastair E - 11-18-2010
I wonder just What they add to 'winterised diesel' that obviously reduces its calorific value to the extent that a noticable power-loss occurs....
Must be a fairly high % of summit, to give such an effect....
RE: fuel temperature - ben2go - 11-18-2010
I dunno what they add.I'll ask a friend that owns a fuel station.
I thought adding methanol helped keep diesel and WVO/VO from gelling?
RE: fuel temperature - Alastair E - 11-18-2010
Nah, Methanol doesnt actually mix with WVO, unless it has a catalyst present, it settles out on top....
Not sure if it mixes with std. diesel, but suspect not....
I think its used sometimes in petrol and for drying out the air brake-circuits of artics...
RE: fuel temperature - ben2go - 11-18-2010
I knew methanol/ethanol wouldn't mix with VO or diesel.I know it's good injected.
I chatted with my friend and he said that the company they get there fuels from don't divulge the mix or ratio of their additives.I was curious,so I ran over and ask him.Their like 2 miles from my house.
RE: fuel temperature - Silberpfeil - 11-18-2010
(11-15-2010, 06:20 PM)ForcedInduction There is none. It varies a large amount depending on the mixture of additives and #1. Anywhere from 25* for average summer fuel to -60* or colder for the low-cetane arctic blends.
1. So arctic blends are low cetane??
2. Does cetane then have an effect on gelling???
3. Is it then better to not use a cetane booster in the extreme cold??
BTW, I re-watched the Top Gear North Pole trip and the fuel they used (that Arctic Truck used) was a mix of diesel and AV gas.
RE: fuel temperature - ben2go - 11-19-2010
(11-18-2010, 10:37 PM)Silberpfeil(11-15-2010, 06:20 PM)ForcedInduction There is none. It varies a large amount depending on the mixture of additives and #1. Anywhere from 25* for average summer fuel to -60* or colder for the low-cetane arctic blends.
1. So arctic blends are low cetane??
2. Does cetane then have an effect on gelling???
3. Is it then better to not use a cetane booster in the extreme cold??
BTW, I re-watched the Top Gear North Pole trip and the fuel they used (that Arctic Truck used) was a mix of diesel and AV gas.
I am surprised they used AV gas.Was it 100LL?Seems like they would have run jet A,because it's formulated to stay a liquid at 50,000 feet and -70*F.AV gas is nothing but a highly refined gasoline, with lead added in to protect aircraft valves, when we lean them out to conserve fuel.
I've checked around and can not find anything about the winter additives.Seems like everybody has a secret.
RE: fuel temperature - ForcedInduction - 11-19-2010
(11-18-2010, 10:37 PM)Silberpfeil [b]1. So arctic blends are low cetane??Low cetane is a result of the kerosene and anti-gelling additives. Cetane boosters, like octane boosters, are mostly placebo effect boosters.
2. Does cetane then have an effect on gelling???
3. Is it then better to not use a cetane booster in the extreme cold??
Quote:BTW, I re-watched the Top Gear North Pole trip and the fuel they used (that Arctic Truck used) was a mix of diesel and AV gas.Thats likely because vehicles in such extreme cold need a more volatile fuel just to run.
Quote:Seems like they would have run jet A,because it's formulated to stay a liquid at 50,000 feet and -70*F.Jet A is very high sulfur, if the pickup still had any emissions equipment that would have plugged them very quickly. It also has poor lubricity and viscosity.
An old inline pump might handle it, maybe a rotary pump too, but a common rail system would be eaten alive by Jet A.
RE: fuel temperature - Silberpfeil - 12-03-2010
(11-18-2010, 10:37 PM)Silberpfeil 1. So arctic blends are low cetane??
2. Does cetane then have an effect on gelling???
3. Is it then better to not use a cetane booster in the extreme cold??
(11-19-2010, 08:56 AM)ForcedInduction Low cetane is a result of the kerosene and anti-gelling additives. Cetane boosters, like octane boosters, are mostly placebo effect boosters.
So cetane boosters should not affect gelling/anti-gelling characteristics??
RE: fuel temperature - ForcedInduction - 12-03-2010
Right. However there are few straight cetane boosters on the market. FPPF 8+ and Diesel Kleen being the only two common additives I can think of at the moment.