Originally Posted By: Black_Thunder
Originally Posted By: alarmguy
Mystik 15w50 Jt8 Diesel oil (a Citgo product) as recommended by the manufacturer of my bike. (if I dont use the bike makers oil)
I only use the above as no other 50 weight diesel oil on the USA market as far as I know and I have posted excellent UOAs on it in the past.
If I didnt have a bike that required diesel oil I would choose Valvoline or Castrol motorcycle oil conventional or syn, doesnt matter.
Buying expensive boutique oils is NOT going to make your engine last longer and is not going to make up for the failings of the engine maker.
Its the design of the engine NOT the oil.
which manufacturer recommended the Mystik?
Just curious, the Mystik oil is readily available to me at a nearby store. I normally use Rotella 15w40 or Mobil Delvac 15w40, and recently decided to try some Amalie 20w50 in my dad's Royal star, but Its nice to have other options
Ahhh .... yes, I saw the way my post read and its not correct.
The manufacturer of my bike Harley Davidson does not recommend any brand of oil other then their own, they do not recommend Mystik. Once I posted that I can see how it can be read wrong. Might have past the time to edit it I cant remember.
Harley ONLY recommends their oil but they say, if unavailable use a diesel oil and change back to their oil ASAP.
I use Mystik because it is a diesel oil and its a 15/50 diesel oil which is almost impossible to find in the USA.
I have posted almost countless UOAs and VOAs on this oil in this forum since 2014.
Im happy with the results, love the way the engine sounds and runs and the only oil I use.
I know for fact the Harley oil is formulated like a diesel oil as others have posted UOA and VOA on this oil. On top of that, Mystik is made by the same company that makes Harley oil - Citgo.
I suspect Harley is concerned with piston and valve deposits and that is the reason for the HDEO type formulation.
Harleys first preference is 20/50 weight oil, followed by the 40s and I ride in HOT weather, I would never go lower then a 50 even though the Mystik is slightly lighter then their 20/50 its much more robust then any 15/40 or 10/40 ,.