Absolutely no issue with using it, even for a long period of time (if you want to). It's a 22 year old engine, and would've probably allowed a thicker oil in the manual if it wasn't a US owner's manual.
I know this is a different manufacturer, but the new KIA K5 with the 1.6L specs 0W-20 on the cap and in the owner's manual, but on Alldata it has an "old style" chart, where up to a XW-40 oil is allowed. The new RAV4 calling for 0W-16 also is this way. The "newer" Mercedes at work spec 229.71 (which is 0W-20) or .51/.52/.61, which 229.51 allows for SAE 5W-40 viscosity.
As long as it's not something like 20W-50 at -40 degrees or way too thin, engines do not care about oil viscosity, even these "super new" ones, or old ones. I'm sure others with have reasons for using only the viscosity listed on the cap, but 99% of engines it will make no difference.