Originally Posted by amblerman
Originally Posted by Dave1027
Rotella T6 5w40 was reformulated about a year ago. It's a totally different oil now. Not that it's no longer good. I still use it and it works well. I mix it with M1 or PP 0w20 in varying ratios. My vehicles love it.
As part of this reformulation, Rotella T6 5w-40 does not carry any specification for gasoline (spark ignition) engines.
I know a lot of people still use Rotella T6 in gasoline engines but it currently does not carry any SX (ie SM, SN, SN+, etc) designation.
And if it matters, there are several Xw40 variants that do carry a gasoline suitable rating that are readily available. ie: Mobil, Castrol, and Pennzoil are all readily available at Walmart with a gasoline engine rating.
I have a 1999 s70 non turbo and I have indeed run Rotella T6 in it when I had a stash of the oil. Once I ran out of it, I started using whatever Xw40 or Xw30 I had from the various clearance sales I found out about here on this site.
-A
The lack of SN on the T6 is completely irrelevant to the usability of the oil. It just doesn't comply with P limit for the SN. Cx is recommended for spark ignited Harleys, used by many in various gassers. Oil is oil, good oil is good oil.