oilman 7 Posted October 29, 2008 At this time of year, it’s 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 when you turn the key. The "w" number which means winter is the key here and the lower it is the better cold start performance the oil will have. A 15w or 20w rated oil will struggle to get around the engine in very cold temps and we would strongly recommend using a 10w, 5w or 0w for better cold start performance. It is a fact that around 90% of all engine wear occurs on cold start because the oil is at its thickest. The colder it gets the thicker the oil becomes and this affects the rate of flow which affects the rate of wear. These numbers help to explain the oils thickness and therefore cold flow performance at various temperatures. 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 Centistokes (cst) is the measure of a fluid's resistance to flow (viscosity). It is calculated in terms of the time required for a standard quantity of fluid at a certain temperature to flow through a standard orifice. The higher the value, the thicker the oil. Winters in this country fortunately are not too cold but, compare the thickness of the oil at 0degC and 100degC and you will see the big difference. Just something to consider on the frosty mornings. The Opieoils Team. Share this post Link to post Share on other sites
Simsy 0 Posted October 30, 2008 At this time of year, it’s 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 when you turn the key. The "w" number which means winter is the key here and the lower it is the better cold start performance the oil will have. A 15w or 20w rated oil will struggle to get around the engine in very cold temps and we would strongly recommend using a 10w, 5w or 0w for better cold start performance. It is a fact that around 90% of all engine wear occurs on cold start because the oil is at its thickest. The colder it gets the thicker the oil becomes and this affects the rate of flow which affects the rate of wear. These numbers help to explain the oils thickness and therefore cold flow performance at various temperatures. 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 Centistokes (cst) is the measure of a fluid's resistance to flow (viscosity). It is calculated in terms of the time required for a standard quantity of fluid at a certain temperature to flow through a standard orifice. The higher the value, the thicker the oil. Winters in this country fortunately are not too cold but, compare the thickness of the oil at 0degC and 100degC and you will see the big difference. Just something to consider on the frosty mornings. The Opieoils Team. Excellent. I was given 15w/40 by the pug dealer yesterday I'll save it for summer methinks. Prob going to use a 5w40 and when i drop the oil in 6K it'll be getting warmer so i'll stick it in then Share this post Link to post Share on other sites
chocolate_o_brian 0 Posted November 3, 2008 Excellent. I was given 15w/40 by the pug dealer yesterday I'll save it for summer methinks. Prob going to use a 5w40 and when i drop the oil in 6K it'll be getting warmer so i'll stick it in then Ah, excellent, bee looking for a little info on this. Currently the Pug is running on 15w-40 semi-synth I believe. It's due an oil change (around 6-7000 miles since last one), and I was curious with the colder weather, what to use. Think I'll go for 10w-40 semi synth then, as the engine is on 135,000 miles. Share this post Link to post Share on other sites
