Oil advice and Recommendation

The shelf life of oil is highly debated, but the general consensus is that simpler oils are safer longer.  If anything has settled out of suspension it's advised to discard it, not try to mix it back in as it won't really fix the problem.  As far as oxidation of an open container, that's debatable.  They weren't packaged in an oxygen-free environment, but an open container does provide much more exposure.  It could be compared to a whisky that was opened or leaking, except that oil can not get better with age or exposure.  I wouldn't be too concerned with air exposure in a small container, but it is a reasonable factor.  A large container that's been mostly depleted increases the oxidation damage.  A 55 gal drum down to a few gallons and long storage should definitely be disposed of.  If you have a diesel engine without too many modern emissions controls it's fuel tank is a great place for oil disposal.

lem2 go to the Opie oils website and it will give you the info To be fair gearbox takes the 80/90 hypoy oil as does the bevel box in bevel box the amounts are in the manulas Molyslip in the bevel box keeps it sweet I tend to pop moly into the gearbox smooths it ...my gearbox has covered an awful lot of miles Opie do not have moly but Halfords have it .....

Additive to the bevel box the drive box in the rear hub buddy I do tend to pop some into the gearbox as well ....look in the manuals it gives the how what and how much ....they are free to download on This old tractor website,

Lemon 2 Junior wrote: Hi, can you give me a price for engine and gearbox oil for my Moto Guzzi Le Mans 2 1981 850cc Road riding, engine and box will be pushed.

We would use Motul 7100 4T 10w-50

The gearbox we would use Motul HD 80w-90

Cheers
Phil

Still waiting.................

Many thanks will check these out 

Just found  that the oil level in my 750 T is right on the low mark. Only place open is Halfrauds, so I ended up buying Mobil 1 full synthetic 10W-60 API SN/SM.