It was cold at Glamis and went through 25 gal of Sunoco Standard (110 using R+M/2) in the LT500, so a buggy trip to across the highway from the Glamis store and bought a 5 gal can of VP 110 (using R+M/2) and happy as VPs M (Motor octane) is 109 and Sunoco M is 106, for those that are not familiar with fuel chemistry M is what makes power, the R component is tested with a small 1 cylinder 4 stroke at idle for a period of time then checked for carbon buildup etc So mix 927 with the VP (no pump gas) and as I finish dumping mix in tank a little stringy dribble drops on the plastic, it looked thick for pre-mix so touched it and it appeared to be straight 927, drained the residual from the can and it was oil. Got the glass olive jar and put some VP and roughly equivalent of 32:1 927, shook it and watched the oil go to the bottom. Instant replay with some Sunoco scavenged from 5 Sunoco containers and no separation. I've heard for years that 927 could separate but it didn't get much thought since I was using a lower motor octane with no problem then looked closer at the 927 label and it says separation at 35 deg but was around 45, then I see specific gravity of the fuel, if lower than .735 separation can occur. Sunoco lower M octane is .729 (.006 low) and VP higher M octane is .705 (.030 low). In my case if I had not seen the oil dribble I might have not have ruined the engine since the oil goes to the bottom and possibly filled the carb bowl with oil and likely would not have started but I had the fuel shut off and I didn't want to experiment with what would happen. Sorry for the term paper but this way you can see and be reasonably certain that this isn't BS or assumption. Oh yeah, the Maxima 927 says you can "lower the temp at which separation occurs by adding 4oz per gal of Maxima Hi-Test", doesn't say how low of a temp so test to be sure. I added a gal of Chevron premium to the VP mix and it stays suspended. Lee