Oil at this time of year

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In
this cold weather, it is beneficial to use an oil that has good cold
start flow properties as it will get to the parts of the engine that
need it far more quickly.

The "w" number which means
winter is the key here and the lower the better.

It may seem
odd but a 15w or 20w will struggle to get around the engine in very
cold temps and I would strongly recommend a 10w or better still a 5w
for better cold start performance. 

90% of all engine wear
occurs on cold start because the oil get thicker the colder it is
which causes engine wear.

These numbers explain what I mean
and bear in mind that the oil will be the following thickness at
100degC (sae 40 = 14cst, sae 50 = 18cst and sae 60 = 24cst)

At
0degC these are the numbers (thick!)

Grade.................At
0C.........At 10C...........At
100C

0W/20.............328.6cSt......180.8cSt..........9cSt

5W/40.............811.4cSt......421.4cSt..........14cSt

10W/50............1039cSt.......538.9cSt..........18cSt

15W/50.............1376cSt.......674.7cSt.........18cSt

20W/50.............2305cSt.......1015cSt..........18cSt

If
you are using anything more than a 10w oil, always warm the car
properly before driving it as the oil needs time to circulate.

Just
a word of warning really.

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oilman Members Profile Send Private Message Find Members Posts Add to Buddy List Club Member Joined: 04 Oct 2006 Location: United Kingdom Status: Offline Points: 746	Post Options Post Reply Quote oilman Report Post Thanks(0) Quote Reply Topic: Oil at this time of year Posted: 02 Dec 2009 at 1:46pm
	< ="CONTENT-" content="text/; charset=utf-8">< name="GENERATOR" content="Office.org 3.1 (Win32)">< ="text/"> In this cold weather, it is beneficial to use an oil that has good cold start flow properties as it will get to the parts of the engine that need it far more quickly. The "w" number which means winter is the key here and the lower the better. It may seem odd but a 15w or 20w will struggle to get around the engine in very cold temps and I would strongly recommend a 10w or better still a 5w for better cold start performance. 90% of all engine wear occurs on cold start because the oil get thicker the colder it is which causes engine wear. These numbers explain what I mean and bear in mind that the oil will be the following thickness at 100degC (sae 40 = 14cst, sae 50 = 18cst and sae 60 = 24cst) At 0degC these are the numbers (thick!) Grade.................At 0C.........At 10C...........At 100C 0W/20.............328.6cSt......180.8cSt..........9cSt 5W/40.............811.4cSt......421.4cSt..........14cSt 10W/50............1039cSt.......538.9cSt..........18cSt 15W/50.............1376cSt.......674.7cSt.........18cSt 20W/50.............2305cSt.......1015cSt..........18cSt If you are using anything more than a 10w oil, always warm the car properly before driving it as the oil needs time to circulate. Just a word of warning really.
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