Mixing oil

[Farmer]

Hi Quick question

Just changing the oil in my old Fiat 500 and havn't quite enough 20w50 , I assume it's ok to top up with some 15w/40 . Both are mineral oils ?

[Defcon5]

I doubt that engine is too fussy. Id go for it

[Farmer]

Defcon5 said:

I doubt that engine is too fussy. Id go for it

Thanks, That's my thought , but had a sudden paranoia attack !!