Ive used so far

1) shell rimula r1 sae 40 (diesel engine oil with api SF)
2) petronas motolub (not mach 5) sae 40
3) caltex delo 400 (diesel engine oil with api SL)

On my:
1) nissan sunnY
2) proton wira 1.3gli.

And had no problems.
In fact if one were to look at the specifications of the SAE 40, and compare the "Kinematic Viscosity cst" with a multigrade, it is actually similar to a 20w40.

And furthermore i prefer to go for those diesel engine oil, because their TBN is usually 2x higher than normal petrol mineral oil, and yet it is so much cheaper.

Monograde benefits is that it doesnt have any viscosity improvers (go google it for more info) to break down , hence it lasts longer than multigrades, althoigh argueably considered low-tech, old fashion, etc on the API ratings.