I remember reading that article when it came out, but as you can see from my sig line, my newest cruiser is my 1987. I have an F engine getting hot tanked and machined as I type this, but still wonder if my oil change schedule by following my decades-old factory manuals is too aggressive?
I guess it costs a lot more than $22 to buy the 8 quarts plus (OEM) filter to change the oil in one of my F or 2F engines, so what the heck, I should probably get mine tested. My FJ60 is within 100 miles of it's normal change interval, was gonna do that this weekend. How many ml or oz. do they need for a sample?