[tonythetarga]

As part of the baseline, it is worthwhile to have the used oil tested. Blackstone Labs is one of the best and most often recommended here. I have been using them for my cars for a number of years. For each oil change you get a breakdown of ingredients and appropriate levels as a range, and actual levels of your oil in comparison. Each subsequent oil change is tracked for that car and you have columns of historical data to compare side by side. It about 25 bucks for the analysis, which, to me is well worth the piece of mind I get from knowing my engine isn't on the verge of detonating.
BTW, welcome to the board. Another DIY you may want to undertake at some point is to remove the front bumper cover and look between the A/C condenser and the rad at each corner. You may be blown away by the amount of crud you will clean out. Since there cars are VERY temperature sensitive, it is very important to do. I've done it with my '99 911 as well as the '98 Boxster I had after it and have it on the to do list this year on my Cayman S.