I recently purchased a 1984 Simplicity 7790 diesel garden tractor. It has a Lombardini 18HP engine. The owners manual calls for 40W oil of CD service class (DS series 3) . I have had no luck finding ANY straight 40W oil. The only straight weight oil I can find is 30W. Can Multi viscosity oils be used in these old engines. I emailed Lombardini and haven't gotten an answer. Can anyone shed some light on this for me. I sure don't want to use anything that would damage the engine. Thanks....Nick
Simplicity 7790 oil type
- Thread starter nfzara
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daman1
Gold Member
Well there's no oil out today that would "damage" your engine,that API classification of oil is long gone and a oil of today will work perfectly fine.
if it requires a 40w you can use any diesel HDEO 5w40 0r 15w40 depending on if the unit is used in the winter?
a multi grade oil listed above is still a 40w when at op temp so it'll work,todays oil's are leaps ahead of yesterdays oil.
if it requires a 40w you can use any diesel HDEO 5w40 0r 15w40 depending on if the unit is used in the winter?
a multi grade oil listed above is still a 40w when at op temp so it'll work,todays oil's are leaps ahead of yesterdays oil.
RWEST
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Check this thread for a discussion about a similar engine's oil needs. I'd guess RTS 5-40 or 10-30 would be the cat's whiskers for that unit... :thumbsup:
