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From: Emmett
Originally Posted by gernby,Jan 11 2010, 08:09 PM
It's normal for the idle to be unstable after an ECU reset, but it will quickly stabilize. I would rather have an idle that wasn't perfect than to contaminate my oil with extended idling.
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for 5 minutes you aren't contaminating your oil that much but over a long period of idling does contaminate your oil. Found this article:
"Idling is not an effective way of warming up your engine, as your vehicle is made up of many moving parts. To properly warm your vehicle’s transmission, tires, suspension, steering and wheel bearings, you need to slowly drive-off.
An idling engine is not operating at peak temperature, resulting in incomplete fuel combustion. Fuel residues can condense on cylinder walls, contaminate oil and damage engine components. With more engine idling these residues tend to deposit on spark plugs. The resulting plug fouling can increase fuel consumption by 4 to 5 %. Excessive idling can also cause water to condense in the vehicle’s exhaust. This can lead to corrosion and reduce the life of the exhaust system. On the other hand, frequent restarting has little impact on engine components such as the starter motor and the battery.
A poorly tuned engine uses up to 15 % more energy when idling than a well-tuned vehicle. Keeping your vehicle in good condition is a key to fuel efficiency and reduced greenhouse gas emissions. Idling your vehicle with the air conditioner on (to keep the interior cool) can increase emissions by 13 %. "
"Idling is not an effective way of warming up your engine, as your vehicle is made up of many moving parts. To properly warm your vehicle’s transmission, tires, suspension, steering and wheel bearings, you need to slowly drive-off.
An idling engine is not operating at peak temperature, resulting in incomplete fuel combustion. Fuel residues can condense on cylinder walls, contaminate oil and damage engine components. With more engine idling these residues tend to deposit on spark plugs. The resulting plug fouling can increase fuel consumption by 4 to 5 %. Excessive idling can also cause water to condense in the vehicle’s exhaust. This can lead to corrosion and reduce the life of the exhaust system. On the other hand, frequent restarting has little impact on engine components such as the starter motor and the battery.
A poorly tuned engine uses up to 15 % more energy when idling than a well-tuned vehicle. Keeping your vehicle in good condition is a key to fuel efficiency and reduced greenhouse gas emissions. Idling your vehicle with the air conditioner on (to keep the interior cool) can increase emissions by 13 %. "
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From: Emmett
Originally Posted by crazysupratt,Jan 12 2010, 09:52 AM
for 5 minutes you aren't contaminating your oil that much but over a long period of idling does contaminate your oil. Found this article:
"Idling is not an effective way of warming up your engine, as your vehicle is made up of many moving parts. To properly warm your vehicle’s transmission, tires, suspension, steering and wheel bearings, you need to slowly drive-off.
An idling engine is not operating at peak temperature, resulting in incomplete fuel combustion. Fuel residues can condense on cylinder walls, contaminate oil and damage engine components. With more engine idling these residues tend to deposit on spark plugs. The resulting plug fouling can increase fuel consumption by 4 to 5 %. Excessive idling can also cause water to condense in the vehicle’s exhaust. This can lead to corrosion and reduce the life of the exhaust system. On the other hand, frequent restarting has little impact on engine components such as the starter motor and the battery.
A poorly tuned engine uses up to 15 % more energy when idling than a well-tuned vehicle. Keeping your vehicle in good condition is a key to fuel efficiency and reduced greenhouse gas emissions. Idling your vehicle with the air conditioner on (to keep the interior cool) can increase emissions by 13 %. "
"Idling is not an effective way of warming up your engine, as your vehicle is made up of many moving parts. To properly warm your vehicle’s transmission, tires, suspension, steering and wheel bearings, you need to slowly drive-off.
An idling engine is not operating at peak temperature, resulting in incomplete fuel combustion. Fuel residues can condense on cylinder walls, contaminate oil and damage engine components. With more engine idling these residues tend to deposit on spark plugs. The resulting plug fouling can increase fuel consumption by 4 to 5 %. Excessive idling can also cause water to condense in the vehicle’s exhaust. This can lead to corrosion and reduce the life of the exhaust system. On the other hand, frequent restarting has little impact on engine components such as the starter motor and the battery.
A poorly tuned engine uses up to 15 % more energy when idling than a well-tuned vehicle. Keeping your vehicle in good condition is a key to fuel efficiency and reduced greenhouse gas emissions. Idling your vehicle with the air conditioner on (to keep the interior cool) can increase emissions by 13 %. "
I'd like to see an article that says that idling an engine that's warmed up causes oil contamination.
Anyway it's really no big deal, Honda states the idle learn procedure most likely for instant gratification. I doubt anyone would want to pick their car up after service with a rough idle.
If you don't notice a rough idle then don't do and if you do then you have options. You won't be contaminating your oil at idle anymore than when you'd be doing your WOT data log.
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i agree with you, idling the car won't hurt the car that much. I mean you are constantly ilding your car thoughout the day ie if you go through a drive thru, etc...I can see it being an issue if you don't change out your oil. But I'm sure everyone changes their oil 
Thats the reason oil goes bad is from heat breakdown and gas contamination.
Thats the reason oil goes bad is from heat breakdown and gas contamination.
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I agree that 5 minutes of idling wouldn't do anything significant, but I try to avoid idling whenever I can. FWIW, even when the engine is warm, idling does contaminate oil, since the piston rings use cylinder pressure to push them up against the cylinder wall. At idle, the cylinder pressures are very low, so there is more blow-by. Accellerating at full throttle doesn't contaminate oil.
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