Am I correct in understanding that B20 is safe to use in an ISC 330 Cummins engine? Will cummins stand behind the warranty?
Yes,
Cummins approved B20 to be used in their engines without losing your warranty. They are currently testing for B50.
I've been running my '04 400 HP ISL now for over a year with B100.
Thomas
Hi smith54. Welcome to the site. As Thomas said, Cummins warranys up to b20. Personally, I think a bio-powered motor home is the way to see the country. Color me jealous.