Montana Owners Club - Keystone Montana 5th Wheel Forum - View Single Post

JimF · 11-18-2006, 02:46 PM

Thanks for that post, AMPS, I also run a Cummings. Mine is an 01 and I have noticed a decrease in MPG over the past few months. I went to a centane boost and have recovered the lost MPG and the lost performance that went with it. I hope Cummings is correct, but I have reservations to some degree. My research by ASTM specification indicates that the new fuel does not meet the same energy standard, approximately 39 centane to the old standard 40 to 45. The lubricants are, by standard, to be put in the fuel by the supplier. Can you trust them to add cost to the fuel?? Don't know, hope so, but suspect.

11-18-2006, 02:46 PM	#49
JimF Montana Master Join Date: Sep 2006 Location: anywhere Posts: 912 M.O.C. #6260	Thanks for that post, AMPS, I also run a Cummings. Mine is an 01 and I have noticed a decrease in MPG over the past few months. I went to a centane boost and have recovered the lost MPG and the lost performance that went with it. I hope Cummings is correct, but I have reservations to some degree. My research by ASTM specification indicates that the new fuel does not meet the same energy standard, approximately 39 centane to the old standard 40 to 45. The lubricants are, by standard, to be put in the fuel by the supplier. Can you trust them to add cost to the fuel?? Don't know, hope so, but suspect.