Join Date: Aug 2007
Location: Staunton, VA - USA
It's interesting that you mention a shop suggesting plain DOT3, as I do happen to know someone who used straight Prestone synthetic DOT3 (of course, all DOT3 has a synthetic base, so their packaging is redundant) for several years before going to YAK363 [the 90/10 mentioned above].
It would be fascinating if someone were able to do a compare and contrast of the lubricity of RR363 as compared to a number of commonly available DOT3 fluids. Even though the DOT3 spec has not changed I would have to imagine that specific formulations have, particularly with the advent of ABS systems. It would not shock me to find out that there are many "off the shelf" DOT3 fluids that lubricate as well as, if not better than, RR363, which has its roots firmly planted in the 1960s.
Sadly, it is beyond my capability to do such research. With each supply outage for RR363, and their increasing frequency, my gut keeps telling me that it will eventually stop being produced. The current outage is supposed to be resolved by the end of the year, but we shall see whether that deadline is met or not.
Michael, now that I know your location you are indeed blessed with a glut of choices of competent, very well-liked, and respected shops that service Rolls-Royce and Bentley motorcars.
The opposite of a correct statement is a false statement. But the opposite of a profound truth may well be another profound truth. ~ Niels Bohr