So my assumption has always been synthetic trumps non-synthetic for all oils. However I've run across a few things that make me question this for the differentials.
Specifically I believe ECGS recommends non-synthetic diff oil for all of their regeared differentials. Also my new RockJock from Currie has a tag that recommends 85W-140 non-synthetic.
So what's the deal? Why are some manufacturers recommending non-synthetic for their diffs? I'm not an expert on oil by any means, but I assume there must be a good reason for this?
Specifically I believe ECGS recommends non-synthetic diff oil for all of their regeared differentials. Also my new RockJock from Currie has a tag that recommends 85W-140 non-synthetic.
So what's the deal? Why are some manufacturers recommending non-synthetic for their diffs? I'm not an expert on oil by any means, but I assume there must be a good reason for this?