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- RDX Aspec Adv.
I have noted no difference between the two in acceleration. I filmed 0-80 and 0-60 runs, and then watched/edited videos paying attention to the time. These videos were not shot on the same stretch of road, but in both cases I did my best to make sure the pavement was level more or less, and if I was off a few degrees, well, that's the real world and this is a real-world test. In both cases of 91 and 93 octane use, I found the 0-60 time to be in the very high 6 second range, not accounting for "roll out". Roll out will usually lop off 0.3 seconds or so. Both fuels do 0-80 in almost exactly 11 seconds. Before testing the 93 octane, I ran 2-3 tanks of 93 under varied driving conditions through the vehicle. To the best of my ability, I cannot discern an advantage to running 93 octane over 91 octane.
-I have not tested with 87 octane.
-My 91 octane tests were done on A36 tires, my 93 tests, on LX25 tires. Neither lost traction, nor was there a size or weight difference (published data) favoring the A36, but I am noting 1-2mpg less on road-trips with the LX25's, so they cannot be ignored as a possible issue, but again, this is real-world testing, and if tire brand in non-traction-limited testing matters more than octane rating, then octane rating doesn't matter.
-I have not tested with 87 octane.
-My 91 octane tests were done on A36 tires, my 93 tests, on LX25 tires. Neither lost traction, nor was there a size or weight difference (published data) favoring the A36, but I am noting 1-2mpg less on road-trips with the LX25's, so they cannot be ignored as a possible issue, but again, this is real-world testing, and if tire brand in non-traction-limited testing matters more than octane rating, then octane rating doesn't matter.