07 G35 requirs warmup at least35 sec in the morning?

[MoonRiver]

The manual of the car calls for at least 35 sec warm up in the morning. My wife's 02 Camry never says that, instead it says as soon as the engine runs smoothly it's ok to move. 'cause we live in FL, it never gets gold here. So as soon as the G drops down from 2000rpm to 1800, then I pull off. Does anyone of you does that 35 sec thing? it looks to me it's more than necessary for today's morden cars, so I rarely wait that long.

[joe603]

For me, I wait until the coolant temp moves. Really, with ANY car, you should wait a min or so on the first startup of the day. This gets the oil that has been sitting overnight to circulate properly.

Now if it's a loaner...I don't wait at all

[smockers83]

You move her once it hits 1800 RPM? You must move that thing pretty quick, right after starting up? If I'm in a hurry I'll at least wait until it hits idle. +1 for oil.

[g35sedanlover]

As I am bored as heII at work, I decided to make a chart of what happens when your engine is cold. When you first start, all the oil in your engine has drained to the oil pan and it takes a little time to pump it through the engine. This happens fairly fast but it takes longer for your engine to warm up, so the wear effects of thermal expansion and tight fitting parts takes longer to alleviate. I am sure the scale and numbers are off, but it should give you a good idea.

[W661335PF]

g35sedanlover is absolutely correct and i want to add some to this. I think oil should be changed less on distance traveled (unless you've exceeded 5K maybe) and more on number of starts (lets say every 500 starts). The most significant damage to your oil's viscosity and protective qualities occurs at startup, when heavy amounts of gas are pumped into every chamber and much of it, unburned, leaks into the oil where it slowly breaks down. This may result in some heated debate, but as someone whose repaired many an engine, this is logical.

By the way, I generally wait about 30 seconds, too. Several technical writers have suggested that the newer engines no longer require this wait time (followed by a highly technical piece understandable only to other engineers); however, while this waiting to warm-up may be a myth, I'll take my chances.
Modified by W661335PF at 2:25 PM 12/27/2007

[gwoods]

I always let mine idel in the garage locked, ebrake set and garage open for about 2 min.

Here in Arizona the temp inside the garage is at least 60F so warm up is short.

[adren77]

I always let car idle for about 30 -60 seconds to let the oil circulate properly before I start driving. Then I take it real easy (Low load and low rpm) until it is warmed up to its normal operating temperature. My car is usually garaged, so even in winter the lowest temp is 45 deg F. If I leave it out over night and it freezes I usually just let it run until it warms up all the way since I don't wanna be sitting inside an ice box.

[MoonRiver]

I did a little search and found what those car talk guys had to say, they were against extended warm up. Quote:

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December 27, 2007

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Cartalk ColumnsMarch 2006Dear Tom and Ray:

I live in San Jose, Calif., where the weather is almost always beautiful. The temperature rarely drops below freezing, even in the winter. However, when I walk my son to school in the morning (any morning, not just in the winter), I often see cars sitting in driveways running, without any driver or passengers. It seems like a waste of gas to me -- not to mention the fact that the cars in question are often huge SUVs used to drive a child two blocks to school. I also find myself wondering how often cars are stolen when people get in the habit of doing this. My question is: Why do people leave their cars running in the driveway for several minutes in the mornings? Does it serve some useful purpose? -- Linda

TOM: No, it doesn't, Linda. My first thought is that you shouldn't do anything. These knuckleheads are just wasting their money by burning expensive gasoline, reducing their already lousy mileage from 10 miles per gallon to nine and a half and slowly going broke. Don't interfere.

RAY: Well, that's a little harsh. You might take a kinder approach, Linda, and just move the car randomly to someone else's driveway. That'll mess with their heads.

TOM: Actually, they probably just don't know that warming up a car is completely unnecessary. Modern cars don't need to be warmed up at all -- even where there IS real winter. You start the car, you put it in gear, and if it goes -- and doesn't stall -- it's ready to go.

RAY: Right. Driving the car at a moderate speed, without hard acceleration, for a few minutes is the fastest way to warm up an engine. You don't want to jump right on the highway and floor it; three to five minutes of "in town" driving is all it needs.

TOM: If it's bitterly cold out, like 10 degrees, you might let the engine idle for 30 seconds or a minute, just to allow the oil to fully circulate and heat up a bit. But otherwise, warming up a car is a complete waste of time and gasoline.

RAY: Now, these people might be more concerned with heating up the passenger compartment than warming up the engine. In which case, there's not much you can do, except let them go broke.

TOM: But let's assume that these folks just don't have up-to-date information. In which case, leaving a copy of this article on their windshield might be a kind way of spreading the news. Beat up old carBack to the March 2006 index

© 2006 by Tom and Ray Magliozzi and Doug Berman. Distributed by King Features Syndicate, Inc.

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[smockers83]

I did a little search and found what those car talk guys had to say, they were against extended warm up.

Extended warm-up is actually bad for the engine, yes. The extended warm-up is the warm-up like the 3-10 minutes people let their cars idle to get the inside nice and toasty. Its just bad for the engine in general. The engine will heat up faster without trying to heat up the passenger compartment. But waiting the 30 seconds to a minute is good.

[adren77]

Why is it bad for the engine?

[gwoods]

I'm going to go with the Infiniti manual over a couple knuckleheads on the internet (refering to Tom and Ray).

When you start your G it idles at almost 2000 rpm for about a min before it drops to about 800 rpm. Does that make it seem useless?

I get every ounce of performance out of my G every day. If I can help it last a little longer by letting it warm up for a min I'll waste that drop of gas.

my 2 pennies,

Jeff

[adren77]

I'm going to go with the Infiniti manual over a couple knuckleheads on the internet (refering to Tom and Ray).

+1

[johnparkyourcar]

I get every ounce of performance out of my G every day. If I can help it last a little longer by letting it warm up for a min I'll waste that drop of gas. Jeff

that is exactly how i feel. i used to drive a honda accord before my G and i waited about a min for that but with my G i like to give it all the time it needs to warm up. even though i have heard that its bad to let your car sit idling, in my opinion i feel better driving after letting my car warm up.

[MoonRiver]

By the way, I generally wait about 30 seconds, too. Several technical writers have suggested that the newer engines no longer require this wait time (followed by a highly technical piece understandable only to other engineers); however, while this waiting to warm-up may be a myth, I'll take my chances.

Modified by W661335PF at 2:25 PM 12/27/2007

I am curious about what those writers said.

[gwoods]

I get every ounce of performance out of my G every day.

I did 31.5 miles this morning in about 20 min

I like the ting ting metal cooling noise the car makes when I turn it off lets me know I got it warmed up.

I usually let it idle in my parking spot for a few seconds while I turn off my ipod before I power it down. Just long enough to burn off any rich mixture left over from my sliding around the parking lot.

[C-Kwik]

The question I would pose is, would warming up a car quicker by lightly driving it produce more wear or would idling for several minutes with a long warm-up time produce more wear?

As for oil change intervals, the 3000 mile or 3 month rule are guidelines. Adjustments should be made to accomodate differing conditions. As a counter example to using how many starts a car goes through, consider some people may commute from location to location. Especially in the case of a delivery vehicle. Warm-up times would be irrelevant as the motor may be at normal operating temperature most of the times it is started.

There can be no simple answer to this question. There are a lot of factors that go into it and it varies from person to person.

I will add this. I really recommend that people not leave their keys in their cars at any time. Locked or not, your keys are the first and primary line of defense from the theft of your car. It's easy enough to break a window and steal a running car. As I've handled many many vehicle theft claims, I've found too many cars are stolen when people leave their car running unattended. Hell, in one claim, the owner had the car running and it was stolen while she was getting something out of the trunk. If you must warm up an unattended car, I would highly recommend a good remote start system so that the keys don't have to be in it and it would shut off if someone tries to drive off in it.

[gwoods]

On the 07 there is no key :-)

Its in my garage idleing and I am usually just around the corner in the kitchen with the door open listening.

They may steal it but they won't be able to start it again when they finally turn it off :-)

[cde2k7]

On the 07 there is no key :-)

Its in my garage idleing and I am usually just around the corner in the kitchen with the door open listening.

They may steal it but they won't be able to start it again when they finally turn it off :-)

That's right! AND it lets you lock it while it's running if it makes you feel better. Well, as long as you don't leave the key in the car.. then she just gets mad.

[zozoka1212]

I am old fashioned and I guess lazy too. I warm up my car for 4-5 minutes every morning winter time. Summer time for about 2-3 minutes.

zozo