I started using Amsoil last summer and I also noticed to drop in oil temp... thought something was wrong w/ my dipstick/temp gauge. I've never seen it above 210* here in 90+ outside temp and I saw 235* with a laser pyrometer last year. PS. I actually was turned on to Amsoil while walking thru the pits of an American LeMans race in Road Atlanta. I saw a crewman pouring Amsoil 10/40 into a GT2 Porsche 911 motor the morning before the race.... a 10 hr endurance race. I was sold, great oil. By the way, the 911 finished te race 3rd in class.