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Originally Posted By: djb Many transmissions now have an array of magnets. The last one I worked on had 9 large ones firmly gripping the pan. That's quite a bit of capacity -- significantly more than the filter. It's not very likely that you can reverse the ferrous buildup on the solenoid. The...

Some of you may remember my oil filter bypass test of years ago. They may be still here. I noted the increased significant likelihood of bypass,especially on cold starts, or cool oil WOT, when using the 10W30 but only in very cold conditions with 5W20 combined with hi revs. Only when the oil was...

Thanks for posting that GM info! I had not seen that. Next time I drop the pan, I'll add a magnet too. Have several from old Magnefines and they are suitable. It's really a pretty good gearbox overall but you can kill it quickly letting it slip and bump too long.

Was this engine modified to increase airflow? If so, you are trying to pull more air thru than the filter was designed to carry, especially when dirty. Did the filter get wet at some point? Getting a cellulose filter wet will significantly reduce airflow capacity and cause it to fail if you...

Have an '08 Chevy Uplander as a work schlepper. It has the 4T65E transaxle in one of it's final applications. It is somewhat notorious for a condition called "slip and bump," whereby one of the mainline solenoids is slow to respond and on acceleration from a stop the trans slips for a second due...

Originally Posted By: dnewton3 But hey - why let facts and data get in the way of good ol' fashioned mythology, rhetoric and powerful marketing hype? This sums it up brilliantly! I admire and appreciate your ability to stay in this "battle" as long as you have and keep explaining the...

More evidence that most oil is underutilized. DN is also the poster child of the "less-is-more" philosophy. If you can do this with "ordinary" conventionals, what happens when you go to the higher shelf oils?

Been very busy. Still am but I missed the crew here.

IMO, the decision on cleaning a filter should be done on a case by case basis. Many if not most of the PC filters are not nearly robust enough to get away with it... blowing... I mean, but it may be possible to gently hoover or use some other means. Some of my tractor filters are and are...

My Take: As engines improve in their design and construction, as lubricants and fuels improve, as the standard air and oil filtration systems improve in efficiency, the need for bypass systems is reduced and the cost effectiveness of installing one moves is reduced. The Chevron test was not...

Originally Posted By: circuitsmith When a gas engine (FI or carb) is shut off it's possible for a cylinder to be left standing filled with fuel/air mix and in the middle of the intake stroke, so the fuel/air can make its way back through the open intake valve and up the intake tract. It's also...

Originally Posted By: Mach1Owner 3. When i say "built for" I mean they were designed with using a 5w-30 in mind, I have also seen Ford Engineers state that they would never run 20 in their engines. Not really an accurate statement. Yes they were "designed for" 5W30 because 5W20 was uncommon...

Originally Posted By: mr_diy [ I previously had neglected to change an original air filter (~80k) and after running a OA and getting a rather high silicon reading, I changed it out and the next OA had one third the silicon level. That original filter did not look bad, so maybe it was...

Define your unhappiness. Or are you evilly under the influence of Fram bashers? ( : < 0

A lot of assumptions here made by people who have not read the paper (and there are other similar ones) or heard a real tribologist talk about it. You can't debate what you haven't read.

Interesting question. I don't know for sure. Possibly you could interpret from MAP readings if you knew the values at full throttle with a clean filter. Possibly the same from MAF. It could be figured out but with easy access to inexpensive restriction gauges, why bother unless it just wasn't...

Originally Posted By: KCJeep Jim these have been mass produced since 2007. If inherently flawed don't you think we'd know about it by now? The ecore is a good example, internet pictures of those with blown media began to surface shortly after their introduction. I was curious about these and...

That is called hysteresis. A "shudder" is something different. Hysteresis is often an adjustment. I don't know your car at all but I have experienced it on vehicles where the TV (throttle valve) cable is misadjusted on cars so equipped. It could also happen if the PCM programming is off for...

Originally Posted By: TFB1 As already mentioned, I consider this more wear just after a OC as lunacy... Have you read the paper or are you dismissing a scientific study just because? Are you also a member of the Flat Earth Society? You brought the term "lunacy" into this discussion.... ?

Yeah, I agree. rubber-to-metal with plenty of spring pressure is enough to keep oil from slipping by the combo valve. This filter appears to have held up well in the short term use for which it was intended. I would advise treading very lightly when it comes to extended use, as the design of the...