I'm working through doing a full fluid change on my 1970 MGB. As best as I can tell, the engine oil has been changed regularly but a lot of other fluids seem to have been neglected.
The original specs call for EP 90 in the rear end, along with a(small amount) in the steering rack. The rack is bone dry(thanks to split boots that help retain the oil) and I don't know the status of the rear end-I'm giving the fill and drain plugs regular doses of PB blaster to try and free them up. I've also heard a lot of horror stories advising to remove the fill plug BEFORE removing the drain plug, as more than one person has been caught with an empty transmission or differential and a stuck fill plug.
In any case, the closest I've been able to find locally is 80W-90. Is this a reasonable substitute for EP90? I'm inclined to think it is, but thought I'd be well advised to ask before just blindly filling. Many of he folks on the MG forums still use EP 90, but seem to buy it in 5 gallon drums. Hayne's says 2.25 pints for the rear end and most reference specify "a couple of ounces" for the steering rack, so I'm not particularly inclined to buy what would likely be a lifetime supply of oil for this. I can't say I won't own other MGs in the future, but 5 gallons is still a LOT of oil for use in an infrequent application that calls for so little.
The original specs call for EP 90 in the rear end, along with a(small amount) in the steering rack. The rack is bone dry(thanks to split boots that help retain the oil) and I don't know the status of the rear end-I'm giving the fill and drain plugs regular doses of PB blaster to try and free them up. I've also heard a lot of horror stories advising to remove the fill plug BEFORE removing the drain plug, as more than one person has been caught with an empty transmission or differential and a stuck fill plug.
In any case, the closest I've been able to find locally is 80W-90. Is this a reasonable substitute for EP90? I'm inclined to think it is, but thought I'd be well advised to ask before just blindly filling. Many of he folks on the MG forums still use EP 90, but seem to buy it in 5 gallon drums. Hayne's says 2.25 pints for the rear end and most reference specify "a couple of ounces" for the steering rack, so I'm not particularly inclined to buy what would likely be a lifetime supply of oil for this. I can't say I won't own other MGs in the future, but 5 gallons is still a LOT of oil for use in an infrequent application that calls for so little.