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Gordy · 01-03-2004, 06:41 PM

I spec'd a 2004 385 Peterbilt with a C13 Cat (435hp/1650 torque)with Freedomline 12 spd and all the toys and whistles. Thought to myself-why not put a C15 (475/1650) and be done with it. All the same options and for only $75 more gave me the big Cat.
No kidding-have the quotes to prove it. Floored both the salesman and myself.
Note that the torque rating is the same but the bigger displacment yeilds more hp at the same RPM.
Cat engine dealership didn't think there would be much fuel mileage difference as neither engine is being worked hard.

01-03-2004, 06:41 PM	#4
Gordy Senior Member Join Date: Dec 2003 Location: Grand Forks BC Canada Posts: 170	I spec'd a 2004 385 Peterbilt with a C13 Cat (435hp/1650 torque)with Freedomline 12 spd and all the toys and whistles. Thought to myself-why not put a C15 (475/1650) and be done with it. All the same options and for only $75 more gave me the big Cat. No kidding-have the quotes to prove it. Floored both the salesman and myself. Note that the torque rating is the same but the bigger displacment yeilds more hp at the same RPM. Cat engine dealership didn't think there would be much fuel mileage difference as neither engine is being worked hard.