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HoosierDaddy · 04-24-2011, 12:57 AM

Hi Forest, According to Shell's data sheet the 15W40 Rotella is TBN-E 11.5 so your good.
If you are using the 40W that is probably Rotella T1. I think the TBN is 10.6 on that oil.
It is good to do an oil analysis when you change oil. Make sure the TBN stays above 10.

04-24-2011, 12:57 AM	#13
HoosierDaddy Senior Member Join Date: Mar 2006 Location: Indiana Posts: 424	Hi Forest, According to Shell's data sheet the 15W40 Rotella is TBN-E 11.5 so your good. If you are using the 40W that is probably Rotella T1. I think the TBN is 10.6 on that oil. It is good to do an oil analysis when you change oil. Make sure the TBN stays above 10. __________________ 1993 Newell 45'#316, 1976 Trans Am 455, 1967 GTO, 1953 Chevrolet 3105 (panel truck),1952 Chevrolet 3600,1969 Airstream Overlander. Always fixing something!