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Finally found a particle size rating for a TP filter of 0.5 micron. Microscopy suggests that's probably correct. That's impressively small. :-)

https://www.officeworks.com.au/shop/officeworks/p/scott-toilet-tissue-1000-sheet-ki4760 We have Scott 1000 TP here. I've used high capacity TP in the past because it comes more tightly wound than normal TP. Both Sorbent and TP with a high sheet count (tightly wound) worked well... but AKT...

Just measured the TP (Toilet Paper) roll and it's 10 x 10 cm. Inside diameter (ID) is 4.2 cm However, not every toilet roll is the same. Both ID and OD (Outside Diameter) vary a bit according to the brand. The other thing that varies a bit is how tightly they are wound. It's not clear if the...

According to the Ryco (oil filter manufacturer) their standard filter filters >35 micron: https://www.ryco.co.nz/catalogue/part/index/part/Z56B ~99% of cars on the road will be running similar filters. There are a few higher efficiency oil filters out there but they don't seem very popular...

The companies doing oil analysis recommend taking an oil sample when hot (within 5 minutes of stopping) because the big particles start to drop out of solution if you wait any longer (refer responses above). However here's another simple analogy...

Those are the larger particles I was referring to. The oil filter will remove anything much bigger than this as they filter 30-40 micron particles. The smaller particles that don't do much damage are in the range N.B. SAE says that 2-22 micron particles are the ones that do all the damage :-)

Particles will sit in your sump or in your engine if they're not in your oil. So was I until I asked the companies that do the tests. It's the really big particles that stay behind. Yes you do get the small stuff... which can mislead you. :-)

Using a magnetic sump plug reduced the amount of circulating ferrous metal (the magnetic stuff) by ~50%. The engine was noticeably quieter after the magnetic sump plug was added. Particles in the oil cause wear in the engine... so any time you remove them it will reduce wear. Particles in the...

When to change the oil is more obvious if you do a microscopic examination of wear metals in your oil: https://www.mainlube.com.au/filtergram/ If you fail to take your sample within 5 minutes of stopping the engine all the largest particles will have dropped out of the oil (remain in the...

When doing an oil analysis the recommendation is to drain within 5 minutes of stopping the engine i.e. at operating temperature. If you wait longer than this the particles in the oil start to settle and you may get an inaccurate reading e.g...

Oil analysis doesn't pick up changes in wear in the combustion chamber. Reductions in vibration, temperature and emissions with an improvement in mileage and power can occur when you improve upper cylinder lubrication. However these changes can be hard to measure in an engine that is running...

We finally got around to doing a proper test on the Trasko oil filter. We did both an oil analysis and microscopy. We found that the Trasko removed 2/3 of the dirt (aka silicon) circulating in our oil i.e. 42 ppm before and 11 ppm after N.B. There was 42 ppm dirt in circulation but only 8 ppm...

There are a few threads which reference original documents: https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/4528761/Slick_50 ...but the video by the inventor of the original formula explaining what happened is about as definitive as you can get? :-)

This must be an old test as it doesn't appear to be online anywhere. Trying to measure physical wear at one point in an engine is not particularly useful... as significant wear could be occurring at any other point in the engine. 1) What they should have done was an oil analysis (relatively...

Originally Posted by slick1 Can't find any tests proving the claims made by Magna-Guard e.g. "When a Magna-Guard Oil Filter Magnet is installed into an oil filter, engine wear is reduced by a factor of 8 to 14-times, fuel economy is improved by a minimum of 3.7 to 5%, and toxic tailpipe...

Did a bit of research on magnets and whether it is desirable to use them to remove metal particles in an engine: http://xcelplus.com.au/images/SumpPlug.jpg Can't find any tests proving the claims made by Magna-Guard e.g. "When a Magna-Guard Oil Filter Magnet is installed into an oil filter...

Hi, Decided to add to this topic as I don't sell Fitch... but have an interest in improving engine performance (especially mileage). My friend Greg Hirst swears the Fitch catalyst improved the mileage on his softail Harley by 45 km/tank. If it's a standard 17 L tank and apparently they get ~45...

Xcelplus is not related to any of the treatments mentioned. A full list of names Xcelplus has traded under is available on the web site. The FTC has taken action against many of companies but not Xcelplus... which has been around much longer than any of these other companies. Xcelplus is...

Xcelplus is a metal treatment not an oil treatment. That means it coats the metal in the engine... and does not affect your oil. What that means is that you can use whatever oil you like. The two products then work synergistically... as each works slightly differently. The other major...