oilman Posted November 24, 2005 Share Posted November 24, 2005 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. Cheers Simon Contact me: sales@opieoils.co.uk Oil data: http://www.opieoils.co.uk/lubricants.htm 01209 215164 Link to comment Share on other sites More sharing options...
Wingnonut Posted November 24, 2005 Share Posted November 24, 2005 What does cst stand for? W.Nut . Rosso Superlight no.087 Link to comment Share on other sites More sharing options...
oilman Posted November 24, 2005 Author Share Posted November 24, 2005 cst = Centistokes The measurement of oil viscosity. Cheers Simon. Link to comment Share on other sites More sharing options...
Wingnonut Posted November 24, 2005 Share Posted November 24, 2005 Cool 😬 I'll have to remember that one for the pub quiz W.Nut . Rosso Superlight no.087 Link to comment Share on other sites More sharing options...
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