In Reply to: Re: Oil tested after 10 years use. posted by TheOldHokie on December 10, 2018 at 14:10:03:
Same basically true for transmission fluid (not oil). Trans FLUID has many additives in it to meet the high lubrication-hydraulic pressures-heat disapation of an automatic transmission.
That said, in the late -40s and early 1950's most oil used was non-detergent. A neighbor was selling a product called Sci-en-tif-ic (I think that is the correct spelling) Anyway, he would drain the oil from his 1947 Ford V-8, pull the filter, wash the filter (I don't know what with). put the oil back into the engine and add the product he was selling which also made up for any loss of oil in the process. I don't know how effective it was but he had over 200,000 miles on the car.