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

[tree98]

I think most of us on here use rotella 15/40 no matter the mileage. I think it has a better additive package than other oils. The cheapest place I've ever found to buy it is Sam's club, I get it by the drum, it works out to about $10 a gallon.

Also you should be using a gallon of gear oil at every oil change

[Waterloo]

Save your money, regular Dino and add some Sta-Lube gear oil, or the equivalent... Walmart sells a good gear lube. Put one gallon in at every oil change, keeps your cam shaft and front gear train happy.