w40
10-W30 but I would use a 10-W40 synthetic blend because of the age.
gf-4 sae 10-w30 or 5-w30
manuals states 15 40 oil The Mercedes '' likes'' more a synthetic 5-W40 or10-W40 even 5-W50.
5-w30
5 w30
10 w30
10 W30 is heaver
5-w30
if it is below -18 or above 38 Celsius... you need 5 W30 if it in between you need 10 W30
It is 0-W40
Honda motor oil 10 w40 sj only
Many lube shops are now using 5 W30. 10 W30 still works well too. Just ask the folks at your oil change shop what they recommend.