Quote Originally Posted by diehard View Post
Shell has Helix Ultra for gasoline engines (0w40, 5w30, 5w40) and Shell Helix Ultra Diesel 5w40. Shell Helix Ultra Diesel is rated API CF, ACEA A3/B3, ACEA A3/B4. Most modern diesel engines require at least API Ci-4 which in turn has already been superseded by CJ-4 and CK-4. Which is why I wonder why ShellÂ’s TOTL diesel oil has such a low API rating that is actually obsolete and not recommended for diesel engines built from 2009 onwards.
shell rotella is their diesel stuff...