Originally Posted By: bchannell
All I'll say is that HyDroGear themselves printed a list of "approved" oils for their tannies, and it only had a handful of names on it, only two or three that I could get locally, and the biggie was Mobil 1 15w50. Now, no other "name" oil was on that list as I remember, but it's been a while since I saw it. But since oil is cheap and trannies are not, in this one case, I did what the manufacturer recommended and used the Mobil 1 in a HG 735 I had. I don't believe you'll have a problem, and I know it's more than likely that HG just didn't want to test/approve every oil out there, because it would take a while, so they just approved a handful and have done with it. BUT, I still will follow their advice.
Where did you get this? When I did the initial oil change on my ZT-2800 a couple years ago, I called and questioned about using the synthetic 15w50 and the guy about half got cranky with me for suggesting something other than conventional 20w50. I just used Mobil 1 15w50 anyways and worked just as fine.