For some reason I think it is cool. My old SD now has 297,000 miles and everything is good. I have a 91 124 with the five cylinder 2.5 turbo and I swear the 617 seems faster. I think this is so even more at take off. Of course the 91 gets about 33 mpg compared to the 26 ion the SD. I wonder if the fuel mileage would improve much with the 124 body?