Friend's Hyundai XG350L specs SP-III; I've used MaxLife instead. This has improved shift quality noticeably - smooth as butter now, even at almost WOT (she drives like a maniac).
The trans fluid should be composed of about 85% Maxlife, 15% old Hyundai SP-III that had somewhere between 25 and 85,000 miles on it.
I'm thinking of adding some Lubegard Red, Platinum, or Lubegard "Highly Friction Modified ATF" supplement.
Anyone forsee any problems adding these to fluid that is mostly Maxlife in a transmission that specs a highly friction modified ATF? Should I go ahead and use the HFM supplement, or should I use LG Platinum?
I'd like to give this transmission some extra life - I'll be doing drain/fills on this vehicle every 15k (it's easy to service) using Maxlife, but if Lubegard can add some life for a few extra dollars I'd be happy to use it.
The trans fluid should be composed of about 85% Maxlife, 15% old Hyundai SP-III that had somewhere between 25 and 85,000 miles on it.
I'm thinking of adding some Lubegard Red, Platinum, or Lubegard "Highly Friction Modified ATF" supplement.
Anyone forsee any problems adding these to fluid that is mostly Maxlife in a transmission that specs a highly friction modified ATF? Should I go ahead and use the HFM supplement, or should I use LG Platinum?
I'd like to give this transmission some extra life - I'll be doing drain/fills on this vehicle every 15k (it's easy to service) using Maxlife, but if Lubegard can add some life for a few extra dollars I'd be happy to use it.