What oil would you use in a high revving i3 engine

[BeerCan]

Getting ready to change the oil on my hijet. It has the KF-VE i3 dvvt 658cc engine. It revs for sure, redline is 7200 and it spends a lot of time above 5k
On the opposite end when I use it on the property it idles and slow speed drives a lot. I can't read the japanese manual
I have 15w40 hdeo and Castrol 0w40 on hand. The mira has the same/similar engine and it calls for 5w30 sn as far as I can tell.

Should I just use the Castrol or should I suck it up and get some 5w30 sn from wally world.

 

[wpod]

Do the 0W- 40.

 

[xgmad]

I have 15w40 hdeo and Castrol 0w40 on hand. The mira has the same/similar engine and it calls for 5w30 sn as far as I can tell.

15w40 and 10,000 mile oci

 

[BeerCan]

15w40 and 10,000 mile oci

At the rate I am going it will take 5 years plus for 10k miles I only have like 245km on it now after 6 months or so

 

[ARCOgraphite]

I am surprised they have such a small engine. I would run motorbike oil, a 4T synthetic of your choice.
I am assuming this is water cooled. That diesel goo will just sap power.

 

[BeerCan]

I am surprised they have such a small engine. I would run motorbike oil, a 4T synthetic of your choice.
I am assuming this is water cooled. That diesel goo will just sap power.

Because in Japan vehicles are taxed based on engine displacement and 660cc is a cutoff. At least that is my understanding.

Water cooled, fuel injection, variable valve etc. It's a modern engine. ~58hp an 44 ft/lbs if I am remembering correctly

 

[xgmad]

At the rate I am going it will take 5 years plus for 10k miles I only have like 245km on it now after 6 months or so

use 15w40 for maximum mpg , protection, and performance.