Scotty... love your videos. I have to say, I learned the hard way before I have totally embraced Toyota. I owned junk GM and Ford cars, a diesel VW (total junk) and a Mitsubishi Mirage (even worse than VW). I now see cars like Mercedes and Audis and just laugh. Waste of money, and time. I have an 03 Corolla that I bought after doing much research brand new. This month I had to do the water pump, that and struts have been really the only fixes apart from brakes and fluid changes. I do oil very 3K and it runs fine. Corolla is for sure as boring as it is dependable. Question for Scotty I have not seen in your videos, what is your opinion of high mileage oils and synthetic blend oils? I have been doing 1/2 conventional and 1/2 synthetic for awhile on my Corolla and 2001 RAV4. The engines seem fine, just wonder if I should avoid synthetics on old cars (Rav has 155K, Corolla has 147K). Thanks Scotty, like you I never bothered to finish my PHD and am glad I left that nonsense. Larry in Ohio.