I was reading a consumer affairs web site ref oil sludge problems on 4 & 6 cyl motors.It stated that due to restricting coolant flow in the head to increase operating temp which improved mileage and performance the oil cooked clogging the oil return passages. Toyota is sending letters to 3.3 million owners saying it will pay for repairs if the owners can provide reasonable proof that they maintained their engines. Has this problem been corrected? and have the engines been redesigned ? As a first time owner of a 07 Camry SE V6 I don't want to take any chances of problems down the road. Thanks to all Sgt Tip