If anything goes wrong at 300 mph, there won't be any organs to donate. Got to 165 mph once in a nitrous equipped mustang. I have no need to ever go that fast again. Normally on a good divided highway I peg the cruise at 120 kph (~75 mph) and let it run. Gets 37.5 mpg (Imp). Power, economy and comfort with great sound (grin).

Pass no temptation lightly by, for one never knows when it may pass again!