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Re: Re: Do tractor engines use alot of oil??
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Posted by john d on October 07, 2000 at 12:19:30 from (206.141.74.34):
In Reply to: Re: Do tractor engines use alot of oil?? posted by Scott Green on October 05, 2000 at 19:33:09:
Maybe.... I think other factors may be working here. If the oil starts LOOKING dirty, I'm not sure that would coincide with a PLUGGED filter. Most full-flow oil filters have a tremendous capacity for crud, and it takes a LOT of stuff to plug them to the point of releasing that relief spring. Maybe the oil starts looking dirtier along about the time it starts breaking down due to heat, fuel dilution, and picking up lots of little dirt/carbon particles. If the viscosity is beginning to break down, the engine will suddenly use more oil. The stuff you SEE in oil that makes it dark is very small. If it were bigger, the filter would trap it. When there's only a little of it, the oil still looks nearly clear, but as it gets dirtier, it may appear to darken at an accelerating rate. The pressure deleloped by the pump is determined by the resistance to flow in the oil passages, along with the pressure relief spring in the pump, the pump's ability to pick up oil, and to some extent the viscosity of the oil. Unless the crankase seals are leaking, or the piston rings are worn, I don't see how a plugged filter will increase oil consumption. In regard to the tractor referred to in the original post, I'm agreeing with everone else that the engine is tired!
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