Quote:
Originally Posted by Ol' Ron
Great thread, logic has it that keep ing all thad Gunk and ware products in suspension is great for an engine with a full flow filter. However, without the FULL flow filter we just pump all that cr*p through the bearings. Plan a head.
|
Ron, I have a non-Ford vehicle that has an automatic transmission in which only 3 qts out of a total of 7 qts can drain out. To change that fluid, the factory specifies to drain and refill 3 times, with a short drive in between each refill, the object being to reach a point at which further purges become pointless, as the fluid has been almost completely changed over. I use this as an example to compare with the bypass filters used on our Fords... With a total of 5 qts in the engine, it's been estimated that it takes only a 10 minute drive to circulate all the oil through the filter.
The non-detergent oil of yesteryear also kept impurities in suspension, but only until the engine was shut down, at which time the impurities slowly began to sink to become sludge on all horizontal surfaces of the engine. This culling of impurities occurred overnight, thereby allowing a somewhat cleaner oil to begin the new day with.
As a side note, all full flow oil filters have a built-in bypass that allows oil to return to service without first being filtered. Although intended to pass increasingly more oil as the filter gets dirty, we as consumers have no way of knowing when and if those filters are actually full flowing.