Amsoil Question
Elder User
Joined: Mar 2003
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From: northern Michigan
Not all synthetics are made from non crude oil sources. There are several out there that take crude oil and hydro crack it and then reformulate the molucular structure to make synthetic oils for lubricants. Petro canada products is one of them. Mobile is another that does this.
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Senior User
Joined: Aug 2009
Posts: 203
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From: Ketchum Idaho
Thanks all for the input! I learn something new each time I come here. I will start a new thread about the 203* since I haven't installed it yet and I imagine Dieselsite would take it back.
Hotshot
Joined: Nov 2006
Posts: 11,288
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From: North of Greenville
That's news to me, Joe. I had not heard that before now. It makes me wonder if you might be able to find the correct "long stem" 195° stats at the International dealer. If I can remmeber to call them, I'll check into that.. or anyone else should also feel free to call and check as well and NOT wait for me to get to it. The way my schedule is going right now, I'm having trouble remembering if I even got up this morning.
Senior User
Joined: Jun 2008
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From: Western WA
Shearing will take place with both dino and synthetic lubricants because it is the breaking down of the viscosity improvement additives that is the primary cause for viscosity loss (IIRC). The source of the lubricant's base stock will also affect this because it influences the viscosity ratings as well... the better the base stock, the better propensity to maintain viscosity over time.
There are actually two mechanisms involved in shearing... 1) oxidation of the base stock from combustion-related acids, and 2) breaking down of the viscosity improvers due to extended exposure to high shear forces over time.
Oil shear is created when it is compressed so hard and fast between two surfaces that it is completely squeezed out from between them, and that is when a lubricant's ability to provide "barrier" protection is required (something like Teflon, graphite, moly, etc.). The potential problem with Teflon based approaches to barrier lubrication, though, is that it is by itself rather soft and pliable and can also be inadequate in preventing metal-to-metal contact.
There are actually two mechanisms involved in shearing... 1) oxidation of the base stock from combustion-related acids, and 2) breaking down of the viscosity improvers due to extended exposure to high shear forces over time.
Oil shear is created when it is compressed so hard and fast between two surfaces that it is completely squeezed out from between them, and that is when a lubricant's ability to provide "barrier" protection is required (something like Teflon, graphite, moly, etc.). The potential problem with Teflon based approaches to barrier lubrication, though, is that it is by itself rather soft and pliable and can also be inadequate in preventing metal-to-metal contact.
Jake
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