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GEN 1 (2010-2014) Ford SVT Raptor Forums
Ford Raptor Suspension Discussion and Modification
Cold weather effects on the suspension.
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<blockquote data-quote="MarkT" data-source="post: 111836" data-attributes="member: 3007"><p>One thing about oil viscosity and temperature that is often misunderstood. Multi-weight oils don't really "change" viscosity as much as the viscosity remains stable.</p><p></p><p>Straight 50 weight motor oil thickens considerably at freezing temperatures. Straight 20W motor oil thins considerably at high temps.</p><p></p><p>A 20W-50 motor oil simply doesn't thicken as much as it gets cold... or thin as much as it gets hot. In other words, a 20W-50 motor oil flows like a 50 weight oil at high temps and a 20W at low temps. </p><p></p><p>20W-50 still thickens and thins with temp changes, just not as dramatically as straight grade oils... the viscosity is more stable when the temperature changes.</p><p></p><p>As far as the shock oil in the Raptor... from what I understand it is a very expensive synthetic oil that is designed to work at high and low temps. But, like all oils I know about, it will still be thicker at freezing temps than it is at high temps. As advised... and as you have experienced... in a few miles the oil should warm enough that the "harshness" goes away.</p></blockquote><p></p>
[QUOTE="MarkT, post: 111836, member: 3007"] One thing about oil viscosity and temperature that is often misunderstood. Multi-weight oils don't really "change" viscosity as much as the viscosity remains stable. Straight 50 weight motor oil thickens considerably at freezing temperatures. Straight 20W motor oil thins considerably at high temps. A 20W-50 motor oil simply doesn't thicken as much as it gets cold... or thin as much as it gets hot. In other words, a 20W-50 motor oil flows like a 50 weight oil at high temps and a 20W at low temps. 20W-50 still thickens and thins with temp changes, just not as dramatically as straight grade oils... the viscosity is more stable when the temperature changes. As far as the shock oil in the Raptor... from what I understand it is a very expensive synthetic oil that is designed to work at high and low temps. But, like all oils I know about, it will still be thicker at freezing temps than it is at high temps. As advised... and as you have experienced... in a few miles the oil should warm enough that the "harshness" goes away. [/QUOTE]
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GEN 1 (2010-2014) Ford SVT Raptor Forums
Ford Raptor Suspension Discussion and Modification
Cold weather effects on the suspension.
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