Query on diesel engine

[bigT]

Recently I heard a Toyota staff said that diesel engine should be turned on and let it run for 30 minutes before the first driving every day.

Is this correct?

[jick.cejoco]

Recently I heard a Toyota staff said that diesel engine should be turned on and let it run for 30 minutes before the first driving every day.

Is this correct?

Wrong myth again.
With today's global warming caused by increased carbon dioxide emissions, it is most advisable not to run your engines unnecessarily both to save fuel, reduce emissions and reduce global warming.
The engine warms up as you drive hastened by the thermostat and controlled radiator fan.

[bigT]

Wrong myth again.
With today's global warming caused by increased carbon dioxide emissions, it is most advisable not to run your engines unnecessarily both to save fuel, reduce emissions and reduce global warming.
The engine warms up as you drive hastened by the thermostat and controlled radiator fan.

3 years ago I bought an Innova, nobody in Toyota told this, recently, my brother in law went to Toyota to collect his new Hilux Conquest, he was informed of this, I doubt if this is the information provided by Toyota or it is the staff’s own understanding like people might tell you various theories about charging and using cell phone battery.

[jick.cejoco]

3 years ago I bought an Innova, nobody in Toyota told this, recently, my brother in law went to Toyota to collect his new Hilux Conquest, he was informed of this, I doubt if this is the information provided by Toyota or it is the staff’s own understanding like people might tell you various theories about charging and using cell phone battery.

Misinformed, improperly trained or rogue service advisors who are not educated about the product which, unfortunately hired without regard to education and experience.

[oj88]

I don't believe anybody would actually say to warm up an engine for 30 minutes. That's such a total waste of time, resources.... and seems like giving a heartfelt finger-salute to the environment.

It's likely he meant 30 seconds, which is reasonable and typically within the time range for anyone preparing to drive off.... Start the engine, put your drink in the holder, stow your things/bag/purse, check the mirrors, check the instrument panel for warnings / fuel level, and then finally buckle up.

[dr. d]

Recently I heard a Toyota staff said that diesel engine should be turned on and let it run for 30 minutes before the first driving every day.

Is this correct?

"BWAHAHAHA...!!"
errr... is this a joke?

i drive out a few seconds after my diesel engine starts.
i have been doing it for over 10 years. the vehicle is still fine.

even 30 seconds seems tooo long a wait...

[Yatta]

Old school pa yan. Imagine the amount of fuel you just wasted idling for 30 minutes.

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[dr. d]

Old school pa yan. Imagine the amount of fuel you just wasted idling for 30 minutes.

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i'm old school.
even back then, we were not that faint of mind.

[maxpedition]

Old school pa yan. Imagine the amount of fuel you just wasted idling for 30 minutes.

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Kahit old school wala nyan. Baka bus driver yun dati at 30 mins waiting time sa pasahero. Waste of diesel and time.

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[12vdc]

Warming up is not a myth but the method is.

It is not a myth that Cold engine consumes more fuel.

It is not a myth that metal expands as it warms so the sealing of pistons and efficiency of burning fuel is achieved only when it reaches normal operating temperature.

The method i do is to drive off the garage with a cold engine and maintain low rpm and shift early untill reaching the operating temp indicated on the dash, or let the cold engine dumb light estinguish before revving hard the engine.

[oj88]

The method i do is to drive off the garage with a cold engine and maintain low rpm and shift early untill reaching the operating temp indicated on the dash, or let the cold engine dumb light estinguish before revving hard the engine.

If we're going to be really technical, you shouldn't shift early. On the contrary, you'd want to delay the up-shift and stay at a relatively low gear at any given speed to let the engine run at high-idle (approx. 1-1.3k RPM). This presents the least load to the engine and promotes higher oil pressure to really get it circulating.

I've observed with my previous Honda that when the engine is cold, the ECM delays shifting up and lets the engine sit at high idle longer than usual before shifting to the next gear.

My current Innova doesn't have that intelligence so while cold, I shift the A/T to 2 then progress to D3 then finally D as the engine warms up. But most of the time, I just start off in D but being mindful on the gas pedal so the ECM doesn't shift up to 3rd.

[Shutterbug]

very helpful thread... so when you say modern diesel engines nowadays don't need long warmup times... how about older diesel engines from the 90's?

[Archerfish]

very helpful thread... so when you say modern diesel engines nowadays don't need long warmup times... how about older diesel engines from the 90's?

Yes, this is very helpful. Thanks for the guy who started this topic, our experts here posted useful information and discussed a few things.

I also have the same question about older diesel engines.

[jick.cejoco]

very helpful thread... so when you say modern diesel engines nowadays don't need long warmup times... how about older diesel engines from the 90's?

No need to waste fuel, start and drive specially hybrids or electric cars. Oils, fuel, engine metals, engine controls have been improved, reformulated and re-engineered a couple of times since then.

[12vdc]

very helpful thread... so when you say modern diesel engines nowadays don't need long warmup times... how about older diesel engines from the 90's?

Old and new same principle of lubrication and combustion. At idling the oil pump delivers the oil from sump to the journals, galleries, no need to rev up. Some oil on top of the engine are retained after shutoff because of anti-drain-back-valve built-in the oil filter, this helps in faster lubrication on cold startups. Oil pressure in action can be seen after startup as the oil pressure indicator in the dash extinguish in less than 2 secs.

Just start the cold engine, drive slowly maintaining low RPM until you reach operating temp.

[Archerfish]

I know someone who is doing this. I tried to observe him to know exactly how many minutes he is doing it but I got impatient so I left him. I might as well ask him next time.

I observed that some models, right after starting from cold condition, will have their RPM reach 2000 for 30 seconds or so then return to normal idle RPM. I think it is safe to say that this is already equivalent to warming up the engine.

[Lin Dan]

Recently I heard a Toyota staff said that diesel engine should be turned on and let it run for 30 minutes before the first driving every day.

Is this correct?

This is plain silly.

Just drive slowly then eventually mawawarm up na din ang engine mo.

[monty_GTV]

what a waste of precious fuel[emoji107]

the perfect reincarnation of the old comic cartoon character asiong aksaya...

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[granro01]

Recently I heard a Toyota staff said that diesel engine should be turned on and let it run for 30 minutes before the first driving every day.

Is this correct?

Your Toyota staff might be 60 yrs. old then as he is still using an old school method of warming engines. Diesels then are not even common rail. Sometimes thermostat are remove and even radiator fans are not working automatically and in sync. with the engine tempt.

For your peace of mind, 30 SECONDS is even more than enough to warm your engine.

Bob

[Vodka]

For your peace of mind, 30 SECONDS is even more than enough to warm your engine.

Bob

30s won't warm your engine







but you don't need to