Royal Purple Diff Oil

[well_fans]

Anyone used this to replace the stock diff oil - claims to be pre-mixed with slip modifier. Just wondered from experience whether it needs any additional modifier added?

[iacs_hsv]

Only used Royal Purple up front, but can recommend Morris Lubricants Lodexol XFS 80 140 - well sorted the 3.73 in my GTS and needs no modifier.

[well_fans]

well just had the diff and gearbox done with Royal Purple - imported from States and had local dealer do the work. Well who can be bothered trying to dispose of all that waste oil legally! Not had much of a chance to try it out but first impressions - diff seems a lot quieter and gear changes improved (already have a ripshifter). Will try light up the rear and see how the diff behaves when I've got more time to play.