The bike: 2012 Harley-Davidson FLHTK Electra Glide Ultra Limited The question: In another thread (http://www.bobistheoilguy.com/forums/ubbthreads.php/topics/3432749/Harley-Davidson_Oil_Capacities) I asked a question about how many quarts of MCV 20W-50 fluid would be needed to do a fluid change in the engine, transmission, and primary chaincase, and it looks like 6-7 quarts is the answer. However, a very helpful poster recommended using MCV in the engine and MCV in the primary chaincase, but SVT 75W-110 in the transmission (rather than the MCV), saying "the Amsoil 75w-110 SVT Gear Oil will help with the tranny whine and notchy shifting." H-D recommends their Syn3 20W-50 in all three holes, and Amsoil does pretty much the same with their MCV 20W-50, but also lists the SVT as appropriate for the transmission (http://www.amsoil.com/shop/by-equipment/motorcycles/amsoil-for-harley-davidson/). Cost wise, it's pretty much a wash, so it effectively comes down to which fluid will give the best performance. At least one site I found makes the case to just go with the MCV in all three holes since the 20W-50 oil and 75W-110 gear lube act almost identically at operating temps. I'm very interested to poll the wisdom of the forum and ask which Amsoil fluid (MCV or SVT) should be used in the transmission of the bike posted above and why. As always, thank you for your help and advice!