10-14-2025, 08:00 AM
Ok. Thanks, guys. Yep, CAT recommends 15W40 for the C15 engines. The tech said he thought they used 15W40 in all CAT engines. He didn't know why someone would specify the Delvac1 over Delvac. I am waiting for a response from Newell on their use of Delvac1.
Bob & Dottie
Newell 1261 & Jeep Grand Cherokee fulltimers
Past Teton Reliance 45' 5th wheel
Custom Volvo VNL780 tow vehicle
2014 Smart car