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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Burning Oil?
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<blockquote data-quote="FordTechOne" data-source="post: 1838862" data-attributes="member: 35543"><p>The calibration change was applied to all trucks. The tight tolerances of these engines allows them to draw excessive vacuum on closed throttle deceleration. That vacuum was high enough that is was pulling oil past the piston rings, causing excessive oil consumption. The calibration change increases throttle angle on deceleration to keep vacuum in the normal range and prevent oil from being drawn into the cylinders. That was the root cause. Longevity, performance, and fuel economy are not affected.</p></blockquote><p></p>
[QUOTE="FordTechOne, post: 1838862, member: 35543"] The calibration change was applied to all trucks. The tight tolerances of these engines allows them to draw excessive vacuum on closed throttle deceleration. That vacuum was high enough that is was pulling oil past the piston rings, causing excessive oil consumption. The calibration change increases throttle angle on deceleration to keep vacuum in the normal range and prevent oil from being drawn into the cylinders. That was the root cause. Longevity, performance, and fuel economy are not affected. [/QUOTE]
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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Burning Oil?
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