It depends on how big the leak gets.Several years, more like a couple of years.
Incorrect. RMS doesn't render the car inoperable. Like any other slow, gradual leak, you add oil. When the time comes, you take the car to the dealer where they replace the entire engine. Where did Porsche claim to beat other cars in every measure, including quality?
Where did Lexus ever themselves claim the LFA would do 220 mph and cost only $200k?
Its lap times are not faster than the 458 on the days that mattered: same-day, same-conditions, same drivers. It's not unparalleled under braking or wet lap times. And so far, there appears to be a lot more quality issues and customers tired of delays and backing out of orders than I've seen for other cars.
You'll see on these links that several owners talk about getting it seen to when the leak gets bigger:
http://www.6speedonline.com/forums/gt3-gt2-gt/214667-2011-gt3-rms-still-issue.html
http://www.6speedonline.com/forums/gt3-gt2-gt/196484-my-gt3-rs-rms-replaced-again.html
Obviously when the leaks get bigger it becomes a serious matter. Besides this fact, oil is not supposed to be used like gasoline. You are not supposed to have to top your oil up every week, or every few days to avoid a major failure. You change it when it's dirty after maybe 5-6000 miles.
The LFA claims did the rounds on the internet 5 years ago and slowly the performance claims fell and the cost prediction rose.
Same driver is meaningless. I could hop onto a track with a GTR and any number of other supercars and probably be faster in the GTR regardless of the other cars' performance levels. Many more adequate drivers would be the same. HvS will always be stronger in 911s and Ben Collins will always be crap in them.
Same Driver != Same Ability
What would be really great is if the 458 and McLaren test drivers both turned up and were let loose on the same day. Do you agree? That way you have:
Same Day
Same Conditions
Same Ability (or as close as you'll ever get)