and since I can't recall that there has ever been a proper documentation here on MUD about "the motor oil speech":
many years ago, Kevin
@Tools R Us, Rob
@BrotherRob, Ben
@-Spike-, Michae l
@ChaseTruck, and I
@DSRTRDR went on a rock-crawling trail kinda late in the morning - so we got to the half-way point for a late lunch past 2pm, but hearing repeated affirmations from Ben (-Spike-), that the shelf road out under the powerline would be easier, because "regularly graded" - [the phrase has become a great moniker for all of our wheeling outings since

]
that winding-grinding shelf road of ~2 hrs in good conditions, however, turned out to take a whole lot longer than anticipated . . . due to not having been graded in some time, it had eroded to being narrower than before, and iffy off-camber in spots - and on top, it was getting dark . . . so, some 4-5 hours or more later . . . by the time we saw asphalt and were aired up, it was -like- 8:30pm with another hour to go into the Phoenix area
so, to stay alert, we started chatting over the CBs - and as we were all kinda tired, the conversation not too soon was taken over by Kevin, and somehow, he landed on the topic of the specifications for motor oils in the US . . .
I remember Ben making occasional efforts to divert to photography, which was also one of Kevin's favorite topics, and he would get onto that for maybe 5 minutes . . .
but then, he was right was back to motor oil - particularly, how the recommendations were changed relative to gas mileage and emissions requirements, and how -when you look at the 80 series, for example- the thickness recommendations for motor oil in other markets than the US are quite different . . . and then, of course, Kevin also went back to before the 80 series, to his experience with the VWs . . .
and on and on it went . . . for at least 45 minutes . . . maybe one of us asked a question or two . . . but he was determined to keep going just as the highway was ever getting closer to home . . .
and ever since then, this was known as "Kevin's motor oil speech"