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2015+ Shelby GT350 Mustang
High Oil Consumption
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<blockquote data-quote="ANGREY" data-source="post: 15750278" data-attributes="member: 188865"><p>I'm NOT saying it's definitive, just an idea here.....</p><p></p><p>So here are all the relevant facts and assumptions and one possible explanation:</p><p></p><p>1) It's pretty safe to assume that all the various GT350 owners are not just flat out wrong. It's probably a safe assumption that some engines are truly consuming excessive amounts of oil, while others are not. This is reflected both in the fact that many 350 owners are advanced car owners (who've owned/own many vehicles and aren't newbies) and also reports that Ford has indeed replaced several long blocks due to documented oil consumption. Summary, there are some people eating oil and others who aren't and all levels in between and it seems like that is well documented.</p><p></p><p>2) Ford has a long history of production knowledge and experience, as well as countless thousands of hours of development testing and experience. I find it highly unlikely that Ford didn't know about this issue prior to full production. It's also highly unlikely that this spectrum in oil consumption is a result in manufacturing variances or excessive tolerances or fitments. Again, this is a longstanding company with millions of engines developed, tested and produced and sold throughout the decades.</p><p></p><p>3) Given that one of the first recommended modifications to new 350 owners is an oil catch can, it's HIGHLY likely that oil carryover into the intake explains a great deal of the oil consumption.</p><p></p><p>4) For reasons stated above, it's unlikely the oil consumption can be explained through leaks. The amount of oil to account for is much too large to go unnoticed via leakage, both on the vehicle and in its various resting places. It ain't leaks.</p><p></p><p>5) The amount of oil being reported collected in the separators varies significantly. The only consistency reported is that most people feature either none or very little collected on the driver's side separator and most or all is collected in the passenger separator.</p><p></p><p>6) The amount of oil collected and oil carryover is related to driving style/use between oil changes and/or separator examinations. Obviously the "windage" or the amount of throw off the rotating components is higher with higher rpms and harder driving. There are probably other factors involved with bypass pressures as well.</p><p></p><p>The varying amounts of oil collected dependent upon different driving habits/use levels might serve to explain at least some, if not most or all of the oil consumption variances and is a much easier explanation than Ford simply messing up the cylinder honing or the rings allowing excessive oil by, etc. It also falls in line with some people showing photos of small amounts of oil and others showing quite high oil collection in very short amounts of time/driving/use.</p></blockquote><p></p>
[QUOTE="ANGREY, post: 15750278, member: 188865"] I'm NOT saying it's definitive, just an idea here..... So here are all the relevant facts and assumptions and one possible explanation: 1) It's pretty safe to assume that all the various GT350 owners are not just flat out wrong. It's probably a safe assumption that some engines are truly consuming excessive amounts of oil, while others are not. This is reflected both in the fact that many 350 owners are advanced car owners (who've owned/own many vehicles and aren't newbies) and also reports that Ford has indeed replaced several long blocks due to documented oil consumption. Summary, there are some people eating oil and others who aren't and all levels in between and it seems like that is well documented. 2) Ford has a long history of production knowledge and experience, as well as countless thousands of hours of development testing and experience. I find it highly unlikely that Ford didn't know about this issue prior to full production. It's also highly unlikely that this spectrum in oil consumption is a result in manufacturing variances or excessive tolerances or fitments. Again, this is a longstanding company with millions of engines developed, tested and produced and sold throughout the decades. 3) Given that one of the first recommended modifications to new 350 owners is an oil catch can, it's HIGHLY likely that oil carryover into the intake explains a great deal of the oil consumption. 4) For reasons stated above, it's unlikely the oil consumption can be explained through leaks. The amount of oil to account for is much too large to go unnoticed via leakage, both on the vehicle and in its various resting places. It ain't leaks. 5) The amount of oil being reported collected in the separators varies significantly. The only consistency reported is that most people feature either none or very little collected on the driver's side separator and most or all is collected in the passenger separator. 6) The amount of oil collected and oil carryover is related to driving style/use between oil changes and/or separator examinations. Obviously the "windage" or the amount of throw off the rotating components is higher with higher rpms and harder driving. There are probably other factors involved with bypass pressures as well. The varying amounts of oil collected dependent upon different driving habits/use levels might serve to explain at least some, if not most or all of the oil consumption variances and is a much easier explanation than Ford simply messing up the cylinder honing or the rings allowing excessive oil by, etc. It also falls in line with some people showing photos of small amounts of oil and others showing quite high oil collection in very short amounts of time/driving/use. [/QUOTE]
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