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omg jdm
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2,002 Posts
Discussion Starter · #3 ·
Well, I have 10w30, and overnight the oil settles to the pan, so in the morning it is a dry start, not to mention like this morning when I started my car it was -4 degrees farenheight!
 

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Resident asshole
Corolla
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9,552 Posts
Wrong. Not all of the oil settles in the oilpan. Alot of it is still in the head and other parts of the engine, and it will stay there.

IF the engine would dry during the night, it would quicky become very loose as friction between metals would wear it out very fast.

10W- oils are good to -18C
5W are used to -30ishC
 

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Registered
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1,390 Posts
I once saw a magnetic heater you could stick on your oilpan,
i do think cold oil effects the engine, and do think it would be beneficial
 

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Dave's
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1,946 Posts
Warming the oil just makes it drain down faster. But it helps it flow better on start-up too. Dipstick heaters have/had a reputation for cooking the oil however. They make block heaters that screw into your engine which are much better.
 

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The Return of the Red Coupe
2010 RAV4 V6
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19,674 Posts
Flashmn said:
Wrong. Not all of the oil settles in the oilpan. Alot of it is still in the head and other parts of the engine, and it will stay there.

IF the engine would dry during the night, it would quicky become very loose as friction between metals would wear it out very fast.

10W- oils are good to -18C
5W are used to -30ishC
What do you mean by "good" to -18C?? is that how cold you can use them and then it becomes too thick?
 

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Resident asshole
Corolla
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9,552 Posts
-18C is the limit for 10W then it becomes grease. If temps go lower, go for 5W.

I once saw a magnetic heater you could stick on your oilpan,
And military trucks here have a holder for a gas blowtorch to heat the oilpan.
But seriously, from my experience, the only working device is the block heater.
 

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Resident asshole
Corolla
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9,552 Posts
Wrong, a blockheater will always help reduce wear to the engine. cold engine has loose tolerances, oils are stiffer, plus the thermal shock in the cylinder when you start. If you want to keep your car and have a problemfree future with it, then definately get a blockheater or a webasto/eberspacher.
 

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Registered
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85 Posts
I see you live in Finland. It is very cold there I am told. A block heater is probably widely used in Finland; but I wouldn't know. In the U.S. it doesn't get nearly as cold as Finland, so you rarely see block heaters being used except on diesels and in Alaska.
In a perfect world engines would be warm and last forever; but we live in the USA.
Usually synthetics are all we need on aircraft, high performance engines & anything we want to start in the winter.:D
 

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Resident asshole
Corolla
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9,552 Posts
Northern states get as cold, we start using blockheaters when its 0C some even give a 30min sequence when its below +5C.

Aircraft still use mineral oil mostly, and as an ex-pilot, I can tell you, they get overhauled very often, unlike cars which you dont overhaul until 200000miles. :lol:
 

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The Mad Scientist
Lexus GS300
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849 Posts
mr.kenny said:
I see you live in Finland. It is very cold there I am told. A block heater is probably widely used in Finland; but I wouldn't know. In the U.S. it doesn't get nearly as cold as Finland, so you rarely see block heaters being used except on diesels and in Alaska.
In a perfect world engines would be warm and last forever; but we live in the USA.
Usually synthetics are all we need on aircraft, high performance engines & anything we want to start in the winter.:D
The average temperature of Vermont is quite a bit colder than the average temperature of Anchorage, Alaska.

If you're really worried about dry startups, get one of those electric oil priming pumps. It gets your oil pressure up to spec when you turn the key to on, so that when you start the engine you already have full pressure and don't have to wait for the pump to build it.

-Doc
 
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