Originally Posted By: alarmguy
Originally Posted By: BrocLuno
Look at the back panel of the new Rotella T-6 CK4 in this thread: https://bobistheoilguy.com/forums/ubbthreads.php/topics/4359262/2/Rotella_no_longer_gas_engine_r See the JASO MA rating. That is gas engine rated for motorcycles.
If you want more ZDDP than 1,200 PPM (0.12%), you'll need to go to specialty oils. Valvoline 4-T and others may meet your needs.
As far as diesel engines and motorcycles, most big diesels have roller cam followers and have for decades. Lots of bikes have slipper cam followers. Maybe the same oil will work, maybe not ...
You can always run VR-1 20W-50 or GTX 20W-50 and it should be fine. But you'll be changing oil somewhat more frequently. UOA's will be the name of the game for a while, while all this gets sorted out ...
If one is looking for a high zinc oil for whatever reason, its best to check the UOA and VOAs in here, as some of the oils you mentioned are lower then the C & S rated Diesel/Gasoline oils that you are discounting..
If you look up Castrol GTX 20/50 I think you will find very low Zinc and Phos.
Here is an example of a past UOA I did on Valvoline 4 stroke ... which is also lower then the current Mystik 15/50 I use.
Valvoline 20/50 conv. motorcycle oil
I couldn't get your link to work so maybe this doesn't matter but if your going to compare additives it should be on VOA. UOA will just tell you how much is left after being used.
Originally Posted By: BrocLuno
Look at the back panel of the new Rotella T-6 CK4 in this thread: https://bobistheoilguy.com/forums/ubbthreads.php/topics/4359262/2/Rotella_no_longer_gas_engine_r See the JASO MA rating. That is gas engine rated for motorcycles.
If you want more ZDDP than 1,200 PPM (0.12%), you'll need to go to specialty oils. Valvoline 4-T and others may meet your needs.
As far as diesel engines and motorcycles, most big diesels have roller cam followers and have for decades. Lots of bikes have slipper cam followers. Maybe the same oil will work, maybe not ...
You can always run VR-1 20W-50 or GTX 20W-50 and it should be fine. But you'll be changing oil somewhat more frequently. UOA's will be the name of the game for a while, while all this gets sorted out ...
If one is looking for a high zinc oil for whatever reason, its best to check the UOA and VOAs in here, as some of the oils you mentioned are lower then the C & S rated Diesel/Gasoline oils that you are discounting..
If you look up Castrol GTX 20/50 I think you will find very low Zinc and Phos.
Here is an example of a past UOA I did on Valvoline 4 stroke ... which is also lower then the current Mystik 15/50 I use.
Valvoline 20/50 conv. motorcycle oil
I couldn't get your link to work so maybe this doesn't matter but if your going to compare additives it should be on VOA. UOA will just tell you how much is left after being used.