Update...
I cooked the beef tenderloin tonight. It was delicious !! Everything worked out perfectly. Again this was a huge roast - 6 1/2 lbs. I rubbed a little olive oil, pepper, and some italian seasoning. I cooked at 375 degrees - 20 minutes/lbs. So It ended up cooking for about 2...
I don't want to ruin such a nice (and expensive) peice of meat. How long do I cook and at what temperature ? I do have an instant meat thermometer that I plan to use. Thanks for your help !!
I plan to cook it up to 145 degrees (medium) and the roast is 6 1/2 lbs !!