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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Ford GT oil in a Raptor
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<blockquote data-quote="Old-Raptor-guy" data-source="post: 1926286" data-attributes="member: 52062"><p>Oh the reason 15w-40 is recommended for diesels (not ford diesels anymore).</p><p></p><p>15w40 is a 25 point spread, that is the highest spread you can have in a conventional oil. Back in the 90's there was a 10w-40 conventional for about 3 years. It was figured out that it degraded rather quickly and did not work out and was pulled from the shelf (discontinued probably a better word)</p><p></p><p>So 15w40 is cheaper. Also diesels are somewhat expected to be started and then ran hard for long time which the 40 helps with heat/protection. Diesels aren't ment for short trips. They are ment to work. So the cold flow is minor issue if the engine is started and ran for hours.</p><p></p><p>Ford recommends 10w30 (normal usage) or 5w40 (severe usage which we already discussed is 80% of owners) on their diesels, I think they know how customers actually use them these days vs 30 years ago.</p></blockquote><p></p>
[QUOTE="Old-Raptor-guy, post: 1926286, member: 52062"] Oh the reason 15w-40 is recommended for diesels (not ford diesels anymore). 15w40 is a 25 point spread, that is the highest spread you can have in a conventional oil. Back in the 90's there was a 10w-40 conventional for about 3 years. It was figured out that it degraded rather quickly and did not work out and was pulled from the shelf (discontinued probably a better word) So 15w40 is cheaper. Also diesels are somewhat expected to be started and then ran hard for long time which the 40 helps with heat/protection. Diesels aren't ment for short trips. They are ment to work. So the cold flow is minor issue if the engine is started and ran for hours. Ford recommends 10w30 (normal usage) or 5w40 (severe usage which we already discussed is 80% of owners) on their diesels, I think they know how customers actually use them these days vs 30 years ago. [/QUOTE]
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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
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