I have a gallon of 80W-90 GL-5 I was going to use to replace the tranny and diff oil in my 51 MG TD but stumbled across a discussion re the 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 much better product? Thanks in advance.
Roger
51 MGTD
74 MGB