CM2350 OIL

[OTR48]

2016 KW T680 ISX CM2350 611,000 miles

Since I got my truck I use Delo 10W-30 isosyn advanced but my truck pass 600,000; the question is do I need to change the oil to fuel synthetic now? that it is high miles now, I been on the dot at 15,000 miles oil changes.

I did a head set adjustment and every thing look good no visual wear and oil sample come back normal.

Also if anyone know a good place to buy oil will be appreciate, I'm paying to much from my local NAPA.

Thank you for your comments.

OTR48