Castrol have stopped making Hypoy LS apparently and there's now a product called Castrol SAF-XJ SAE 75w-140 Fully Synthetic Hypoid Gear Oil
First of all, is this a suitable oil for a 1988 +8 differential?
Secondly, noting it's synthetic, will it still need the magic little bottle of Jaguar additive?
What other manufacturers' products are preferred today for this final annual crawl-under Spring rite?
Thanks for all ideas/comments
John
Your 1998 +8 will have a GKN-Salisbury axle with the Salisbury (not Quaiffe) limited slip diff (unless it has been replaced with a BTR one). I think you should take a look at
http://www.gomog.com/allmorgan/axlefilling.html which gives some details of oils - in particular it suggests you do not use the same oil as the BTR. The recommended oil grade is EP90 or 85W-90 which are lighter grades than the 75W- or 80W-140 that you are planning to use. I notice that Millers do a lim-slip EP90 (XEP90) oil which appears to be a direct equivalent of Castrol Hypoy LS. It is a mineral-based oil so you would have to change it more frequently than you would a synthetic. The handbook for my '93 +8 (same axle as yours, I think) recommends every 5,000 miles.
Maybe others have tried the new oil in the older axles - I don't know - if so it would be interesting to hear from them.
