Tremor38 said:
A question for the oil gurus. I've heard about people using Rotella synthetic for diesel engines because the lack of friction reducers makes it compatible with a wet clutch. We don't have that on base, but I noticed Mobile 1 for turbo diesels and was wondering if that would work OK??
One of the reasons many, (including me), like the Rotella T-6 synthetic is the price. $24 for a gallon, often less on sale at Autozone.
That said, here are the specs for Mobile 1 Turbo Diesel Truck oil 5W-40:
API CJ-4, CI-4 PLUS/CI-4/CH-4/CG-4/ SM/SL/SJ
ACEA E7
Caterpillar ECF-2, ECF-3
Here are the specs for Shell Rotella T-6 5W-40:
API CJ-4, CI-4 PLUS, CI-4, CH-4, C4, SM, SL, SH; ACEA E9; Caterpillar
ECF-3, ECF-2; Cummins CES 20081; DDC 93K218; Ford WSS
M2C171-E;
JASO DH2,
MA; Mack EO-0 Premium Plus; MAN 3275;
MB Approval 228.31; Volvo VDS-4
Here are the specs from the Yamaha Owner's Manual, (page 9-1), for the Super Tenere:
Recommended engine oil grade: API Services SG type
or higher,
JASO standard MA.
From reading the specs, I'm certain Rotella meets and exceeds the Yamaha recommended specs. I'm not sure about the Mobile 1, but if I understand the API ratings, it does exceed SG type specs, which would suggest it is acceptable. Both oils share many of the same ratings. API changed their specs, removing motorcycle wet clutch applications from their descriptors some time back. :-[
Good Wiki
HERE
Note that API=American Petroleum Institute and JASO=Japanese Automotive Standards Organization, and who built our bikes.