Originally Posted By: passgas55
I email Shell about the T1.
This is what they have to say
"Yes, Shell Rotella T1 Oil SAE 30 has been reformulated compared to
previous versions of the product. Unfortunately, we no longer
recommend the product for use in gasoline engines"
For me with my gas engines in warranty I will pass. They do not reommend for gasoline engine use.
That's interesting, but puts doubt in my mind regarding answers we get from company technical sources (duh). Here's my reply from May 2010, regarding use of T1 in a commercial Exmark Z turn mower with air cooled engine (emphasizing heavy duty use):
"Rotella T1 SAE 30 is suitable for this application although the SJ is no longer claimed. An alternative is the Shell HD motor oil SAE 30 for which we claim SM, the highest API gasoline rating that will cover previous categories SL and SJ.
Regards,
Keith Pxxxx
Shell Technical Information
800-237-8645 Opt 4, 1
My problem with this answer is that he is implying that the SM oil is as suitable as the HDEO oil.