gilberjj said:
not according to the post right above yours... The rotella cj4 outperformed everything else. You are simply making statements that mobil > rotella t. While you are entitled to your own opinion, please share your proof.
Copying from the top post in that linked thread, and comparing apples to apples and oranges to orange, results in a different conclusion:
Oil Performance in descending order with 2 or more entries. 8/25/09
Shell Rotella T CJ4 5W40 API 2
Amsoil DEO CJ4 5W40 API 2
Mobil 1 TDT CI4+ 5W40 API 9
TOTAL MC3 VAG 4
Schaeffer S9000 CJ4 505.01 5W40 API 2
Mobil TDT CJ4 5W40 API 2
Mobil 1 Delvac ESP CJ4 5W40 API 5
Elf LLX 504/407 5W30 VAG 6
Mobil 1 ESP 504/407 5W30 VAG 4
Castrol Pro 505.01 5W30 VAG 4
Castrol SLX III 504/507 5W30 VAG 5
Shell Rotella T CI4+ 5W40 API 7
If you compare the API CI-4 versions of each, then Mobil 5w40 ranked 3rd and Shell Rotella T 5w40 ranked 12th. The sample size is pretty small.
The sample size of the CJ-4 versions of each, two tests submitted for each oil, is too tiny to draw any conclusions at all.
I don't have anything bad to say about Shell Rotella, in any of its formulations.
Additionally, what is not shown in the database is whether the tested oils could have gone longer between drains. A high percentage of Mobil 5w40 tests showed that an extended oil drain interval was possible.