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	Science Forum Forum Index » Engineering & Transportation » Motor oil  Motor oil « View previous topic :: View next topic »  Author Message sciency Posted: Mon May 07, 2007 1:48 pm    Post subject: Motor oil Forum Freshman Joined: 21 Apr 2007 Posts: 4 Why are different types of motor oil used in a car, depending on the seasons?? Back to top Jellyologist Posted: Mon May 07, 2007 3:44 pm    Post subject: Re: Motor oil Forum Senior Joined: 12 Jan 2007 Posts: 330 sciency wrote: Why are different types of motor oil used in a car, depending on the seasons?? tI depends a lot more than the season but also type of engine, heat generated, road conditions, etc. I live in Canada. Summer grade oil is like tar when temperatures reach minus 40c or so. In contrast, winter grade oils are too thin at warmer summer temperatures. Most of the wear on an engine isn't from driving but starting and warming up an engine. You need things flowing quickly and properly at a particular viscosity. Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First     Page 1 of 1 Science Forum Forum Index » Engineering & Transportation » Motor oil Jump to: Select a forum Natural Sciences----------------Astronomy & CosmologyBiologyChemistryEarth SciencesMathematicsPhysics People----------------Behavioral & Social SciencesHealth & MedicinePhilosophical DiscussionHistoryReligionPoliticsCriminology and Forensic Science General Technology----------------Computer ScienceElectronicsMilitary Technology Information Technology----------------Business & EconomicsEducationEngineering & Transportation International Issues----------------Environmental IssuesIn the News The Science Forum----------------General DiscussionIntroductionsScience-Fiction and Non-FictionExperimentationPseudoscienceLinksArt and Culture Site Administration----------------Site FeedbackTrash Can  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
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