I asked the Shell Tech Department if Shell Helix Ultra 5w40 is a Group 3 or Group 4 oil. I got the following response :
Chris,
Helix 5W/40 is a Group 5 oil. Non PAO.
Regards
[email protected]
That's interesting, I thought Motul 8100 / 300V was the only full Group 5 Ester based synthetic ?