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2015+ Shelby GT350 Mustang
Another oil consumption thread
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<blockquote data-quote="gimmie11s" data-source="post: 16171211" data-attributes="member: 17953"><p>Its a good discussion and important to try and figure this stuff out.</p><p></p><p>In theory, that makes sense. Question is do you ever hear piston slap? Ive not heard any 350 owners reporting that problem.</p><p></p><p>Also, the amount of swelling the piston would have to experience to make this logical would be so much, you could actually <u><em><strong>see </strong></em></u>the difference in piston size cold vs. warm. That in and of itelf would present a ton of other issues. Even a motor with cold start piston slap is going to have a piston damn near perfectly perpendicular to the combustion chamber once it reaches TDC.</p><p></p><p>To test the theory, we can look to an engine design with known piston slap issues; the early Chevy LS motors. Wife's 6.0 suburban slaps every morning for a minute or two as it warms up. This motor has 192k miles and uses about 1/2 quart of 5w30 between 5000 mile oil changes which is basically nothing. In all likelihood that 1/2 quart is due to valve guide wear more so than ring wear.</p></blockquote><p></p>
[QUOTE="gimmie11s, post: 16171211, member: 17953"] Its a good discussion and important to try and figure this stuff out. In theory, that makes sense. Question is do you ever hear piston slap? Ive not heard any 350 owners reporting that problem. Also, the amount of swelling the piston would have to experience to make this logical would be so much, you could actually [U][i][b]see [/b][/i][/U]the difference in piston size cold vs. warm. That in and of itelf would present a ton of other issues. Even a motor with cold start piston slap is going to have a piston damn near perfectly perpendicular to the combustion chamber once it reaches TDC. To test the theory, we can look to an engine design with known piston slap issues; the early Chevy LS motors. Wife's 6.0 suburban slaps every morning for a minute or two as it warms up. This motor has 192k miles and uses about 1/2 quart of 5w30 between 5000 mile oil changes which is basically nothing. In all likelihood that 1/2 quart is due to valve guide wear more so than ring wear. [/QUOTE]
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2015+ Shelby GT350 Mustang
Another oil consumption thread
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