Mar 15, 2015 · Noticed Shell has a Full Synthetic 15w40 and 0w40 added to their T6 offerings. Prior to this the T6 was 5w40. Not sure I see a reason for 15w40 Full Synthetic when there was already a …

Oct 21, 2005 · I have only used two brands of oil 15w40 Motorcraft originally when the dealer used to change the oil and as of the last 2-3 oil changes I went with the Shell Rotella T 15w40. No problems …

Jun 3, 2021 · Rotella T 15w40 used to be a good oil for '60s cars after ZDDP levels were reduced when cats came in. The numbers matching guys have switched to the boutique oils with elevated ZDDP …

Jul 19, 2004 · I'm using Shell Rotella-T 15W40.How does Delo 400 compare to Rotella-T ? Is it any better?Thanks Joe.

Jun 21, 2017 · Newby here and 1st post. I've been using Shell Rotella T 10w30 in my pre 2000 Cadillac Northstar and 2001 Jeep Wrangler based on info from the Jeep and Cadillac forums on it's higher …

Dec 14, 2015 · Shell Rotella Triple T 15W40 HDMO has been in the engine for 1000 miles...looks good, will be changing soon but I suspect the results are positive. Very little loss during cycle and clean …

Oct 21, 2021 · I have been doing some research on the various Rotella 15w40 oils and have a few question hopefully you all can help with. I have been using the T4 claimed "synthetic blend" for some …

Nov 14, 2007 · Shell Rotella T with Triple Protection, the company’s premium oil, is “targeted toward the owner-operator and small fleet because they keep their trucks longer, and therefore want the extra …

Jun 28, 2017 · The reply I received from Shell this morning. Enquiry: Change in Rotella T4 with API SN rating Response: Hello Steve, Trust you are well. Rotella Multi-grade oils are still API CK-4 and we …

Jun 6, 2020 · Some people trust Shell Rotella T6 to protect gasoline engines with flat tappet camshafts, provided the viscosity is suitable. Although T6 has good zinc and phosphorus levels, these engines …