So for the last two years in all my bikes Ive used to great success 15w40 Rotella T in the sumps. I seriously couldnt be happier for the value and performance. Until I saw at walmart right next to Rotella T there is a HUGE 2.5 gallon jug of Super Tech 15w40 for I cant remember what price now but it has been making Rotella T not nearly as pretty paying $13 a gallon. There's also the others I'd love to try at some point like Chevron Delo and Mobil DelVac. Has anyone given the Super Tech a shot in there bikes or any of the other diesel oils?