Can't believe this mark
It's unacceptable this "bulletin" information.
All isuzu engines are almost the same in context & configuration;I can't understand how they came down with this conclusion
I use around 1 quart every 1K & i can assured you i don;t drive my horse hard in any way,my driving commute is 95 % city & 5% highway i got to mention that i drives around 15 miles on a daily basis.
Isuzu engines are a huge fraud to every one of us,i'm so sorry original owners paid 30K for this crappy engine.