Does Kenworth still make the W900?
Kenworth is still making the W900B and the W900L. They did discontinue the W900S.
How often does a Kenworth semi need an oil change?
It is recommended approximately every 25000 miles to keep your truck in top running performance. Kenworth recommends the Shell-Rotella T5, a 10W-30 Synthetic HD Diesel Engine Oil.
What is the best semi engine?
The PACCAR engine is the most reliable engine. They are currently used by both Kenworth and Peterbilt. PACCAR's biggest engine is the 12.9L MX-13, built for the heavy haul large semis.