kennyblanchard Report post Posted October 19, 2015 Does it matter if I use diesel #1 at normal gas station vs. diesel #2 at truck stops? I have 2015 Tiffin Phaeton diesel pusher with Cummins engine. Share this post Link to post Share on other sites
wolfe10 Report post Posted October 19, 2015 #1 diesel is also called "winter grade" and gels at a much lower temperature than #2. #2 has more BTU's/gallon, so MPG and power are a little better with #2. If you have #2 diesel that will be exposed to freezing temperatures, add an anti-gel. I know Walmarts carry PS brand anti-gel. Share this post Link to post Share on other sites
