I'm probably trading my 2004 Gt for a 07 speed, question is, is that i never got around to changing my tranny oil over to Redline MT-90. Is that tranny oil compatible with the speed3? I'd like to do it within the first few days, along with a full synth oil change. If you say that synthetics don't make a difference, don't bother telling me. I swear by them...
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The weights are the same 75W90 but only GL-5. and i'd wait till at least 3k before you put in synthetic. I'm not trying to start some debate war with other members but if you want to know why then i will be happy to. I don't want someone else posting something that just says crap like "your wrong" blah blah.
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