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<blockquote data-quote="UnleashedBeast" data-source="post: 10782027" data-attributes="member: 112023"><p>Ford, as many other auto manufacturers, decreased the recommended weight of engine lubricant due to CAFE laws. The SAME Ford modular engines in Australia are spec'd for 5W-30, and they are the SAME internally. The reason why.....Australia doesn't have CAFE laws. Ford saves millions of dollars a year in penalty fines by improving mpg by 1/10th on every modular using 5W-20 versus 5W-30. To read more about CAFE laws, click here. </p><p></p><p><a href="http://www.nhtsa.gov/cars/rules/cafe/overview.htm" target="_blank">CAFE Laws - why 5W-20 was spec'd</a></p><p></p><p>Here are two cliff notes that are very important to the conversation at hand. </p><p></p><p></p><p></p><p></p><p></p><p>5W-20 is the <strong>"minimum"</strong> spec'd/recommended engine lubricant for the new 5.0 Coyote, but it's not the only lubricant OK to use. Don't take everything you read in your owners manual as gospel. You are not going to run into issues using a 30 grade lubricant where a 20 grade is spec'd, you will actually INCREASE engine protection. 5W-20 is OK to use on stock engines driven as grocery getters, but they are not suitable for long term use in high horsepower applications with a modded 5.0 coyote. Don't assume Ford knows better than someone like me just because I didn't build the thing. </p><p></p><p>Ford made a "business" decision I like to call an "acceptable sacrifice". 5W-20 will take your engine well out of warranty periods before any trouble would occur from using too light of a lubricant. Also keep in mind that they don't have to warranty a modded engine, as that violates your warranty policy. </p><p></p><p>Let's leave the oil discussion to guys like me who know what's going on behind the scenes so the proper advice can be taken, and to why 5W-30 or 10W-30 is a far better choice.</p></blockquote><p></p>
[QUOTE="UnleashedBeast, post: 10782027, member: 112023"] Ford, as many other auto manufacturers, decreased the recommended weight of engine lubricant due to CAFE laws. The SAME Ford modular engines in Australia are spec'd for 5W-30, and they are the SAME internally. The reason why.....Australia doesn't have CAFE laws. Ford saves millions of dollars a year in penalty fines by improving mpg by 1/10th on every modular using 5W-20 versus 5W-30. To read more about CAFE laws, click here. [URL="http://www.nhtsa.gov/cars/rules/cafe/overview.htm"]CAFE Laws - why 5W-20 was spec'd[/URL] Here are two cliff notes that are very important to the conversation at hand. 5W-20 is the [B]"minimum"[/B] spec'd/recommended engine lubricant for the new 5.0 Coyote, but it's not the only lubricant OK to use. Don't take everything you read in your owners manual as gospel. You are not going to run into issues using a 30 grade lubricant where a 20 grade is spec'd, you will actually INCREASE engine protection. 5W-20 is OK to use on stock engines driven as grocery getters, but they are not suitable for long term use in high horsepower applications with a modded 5.0 coyote. Don't assume Ford knows better than someone like me just because I didn't build the thing. Ford made a "business" decision I like to call an "acceptable sacrifice". 5W-20 will take your engine well out of warranty periods before any trouble would occur from using too light of a lubricant. Also keep in mind that they don't have to warranty a modded engine, as that violates your warranty policy. Let's leave the oil discussion to guys like me who know what's going on behind the scenes so the proper advice can be taken, and to why 5W-30 or 10W-30 is a far better choice. [/QUOTE]
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