That is a bit of an exageration, if I do say so myself. Why would you need additives? None of my cars have a by-pass filter. Other than interest, no rerquirement to do a UOA. I may be half cocked, but I need to call you on this one. Sorry.quote:
if I have to change the full-flow oil filter every six months and top off with make-up oil and use lube control and no telling what other additives and install a by-pass filter and do a UOA every six months and buy it from some half-cocked MLM salesman
First of all I will agree that the older formulas and in particular the 5W-30 ASL did thicken a bit in SOME cars. Perhaps this was some oxidation....but "thicken so much" and "unchecked oxidation" are not a good word choices. I honestly have not had any Amsoil motor oil "thicken" in my cars and oxidation was low. The thing that other smart folks observe on "thickening out of grade" and have posted on this numerous times....when an oil starts high in a range, it doesn't take much of a percent change to go into the next grade. Perhaps this is why it's acceptable per API.quote:
quote:
--------------------------------------------------------------------------------
Originally posted by crashz:
One thing that has me scrathing my head is that Amsoil has the lowest Noack ratings, yet it thickens up when run for a length ot time. Why would an oil that has the least evaporation loss, thicken up so much?
--------------------------------------------------------------------------------
Because it's thickening from unchecked oxidation (per Terry) and not from boil off.