Does anyone know were most of those particles are coming from? It would seem that they would have to be coming into the engine via the air intake. Other than metal wearing off I can't imaging anything other than dirty fuel perhaps.
Do filters filter?
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Jim astute observation, In real time if you are sucking in that much dirt no amount of oil filtration will stop the sand blasting the intake area, valves,top of pistons,cylinder walls,rings are encountering.
Air filtration is the key to low wear when used with average full flow oil filters, and Superior motor oil.
Aside from dirt entry,if your engine is generating 20 um and above wear particles from within you have another contamination source or a metalurgy issue.
Air filtration is the key to low wear when used with average full flow oil filters, and Superior motor oil.
Aside from dirt entry,if your engine is generating 20 um and above wear particles from within you have another contamination source or a metalurgy issue.
What is so bad about changing filters? Sounds easier than dumping the oil. Also as far as bang for the buck, over the lifetime of the car, would you not come out ahead?
Lastly, sump capacities... what would be the optimum sump capacity? I'm up to 9+ qts on my truck with the by-pass and larger FF.
It will be interesting to see my analysis, as this will be the 2nd full year on this system. I need to change out both filters this time as the BE-110 will have been on the 2 full years and I have so far changed the FF only once. Though I'm getting ready to change the FF again here soon.
It has been failed to mention that this SAE study referenced above (someone was nice enough to send me the PDF file to print out) was performed in Nov 1988, that's 14 years ago. So, how relevant is it today with better oil, better filtration (air and oil) I don't know.
However, it states that at the 15 micorn level wear was reduced by 70%. Okay, most filters today are at that level. Thus, at what cost and more importantly, at what mileage do the particles (the 30% wear left at the 2-15 micron level) become a factor at decreasing engine life and what is the correlation to oil change intervals. If you change every 3000 miles, well, obvious answer. Change every 7500, well, will these 2-15 micron particles cause my engine to fail at 150,000 or 200,000 or 300,000. That is the key issue. And for most people, 150,000 miles is more then enough.
One other point, wear increased with only a bypass filter (no full flow on engine) as the bypass could handle only a small portion of the flow and most oil went unfiltered which "may" verify the theory that flow is more important in a filter than lower filtration below the 15 micron level.
[ February 13, 2003, 11:37 AM: Message edited by: Spector ]
However, it states that at the 15 micorn level wear was reduced by 70%. Okay, most filters today are at that level. Thus, at what cost and more importantly, at what mileage do the particles (the 30% wear left at the 2-15 micron level) become a factor at decreasing engine life and what is the correlation to oil change intervals. If you change every 3000 miles, well, obvious answer. Change every 7500, well, will these 2-15 micron particles cause my engine to fail at 150,000 or 200,000 or 300,000. That is the key issue. And for most people, 150,000 miles is more then enough.
One other point, wear increased with only a bypass filter (no full flow on engine) as the bypass could handle only a small portion of the flow and most oil went unfiltered which "may" verify the theory that flow is more important in a filter than lower filtration below the 15 micron level.
[ February 13, 2003, 11:37 AM: Message edited by: Spector ]
Michael, the analysis result will be the key.
I hate changing oil more than the next guy, my liver probably looks like swiss cheese after all these years !
How much do those filters cost ? What is frequency of replacement, how much oil do you topoff,how often ? How much was intial cost to install ?
How does the analysis look after all this.
I'm not saying don't do it,, I'm saying there are less expensive and a only nominally more wear generating way to go.
I hate changing oil more than the next guy, my liver probably looks like swiss cheese after all these years !
How much do those filters cost ? What is frequency of replacement, how much oil do you topoff,how often ? How much was intial cost to install ?
How does the analysis look after all this.
I'm not saying don't do it,, I'm saying there are less expensive and a only nominally more wear generating way to go.
That might be pushing it a little - a Fleetguard LF653, for example, is for a commom Chevy pickup application - it is 73% efficient for 30u particles. They do make an upgrade that is built with their Stratpore media - its efficiency is 100% for 30u particles and 73% for 10u particles. Remember, these companies closely match the original OEM filters with their replacements.
My take is that this increased wear is to be expected with no full-flow filter. Remember, with a bypass filter only, it may take several minutes of running before the sump capacity is filtered through the bypass filter.
They did say in this study that filtering the particles between 2 and 22 microns in size is important for controlling wear - one way to get there is with a bypass filter.
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