I have a FREE gallon of 80W-90 GL-5/MT-1 I was going to use to replace the tranny and diff oil in my 51 MG TD but stumbled across a brief discussion re the EP sulfur additive very bad - eats up bronze. Is this real? I don't drive this car hard - maybe 1000 miles/year ..if lucky. Redline MT-90 a better product? Thanks in advance. Roger 51 MGTD 74 MGB