hey id like to change my oil and i dont have a manual, im not really concerned with brands so much. i just need to know what i need 10w-40,10w30,5w-20,ect. thanks for the hook up this forum is great.
2018 Triumph Street Twin..............2016 CB500F
2014 XT250 ..................................2008 H-D Softail Deluxe
2008 SV 650..................................2007 DR 650..
The API oil classifications in the old manuals no longer apply to motorcycles. I've posted plenty of info on the changes in motor oils and how these changes are bad for TWs. You can read some of those threads.
To make a long story short, I've switched to Mobil 1 Racing 4T in 10W40 for winter and Mobil 1 V-twin in 20W-50 for summer.
Avoid any oil labeled "ENERGY CONSERVING" or "EMISSION REDUCING". Use only oils with JASO MA certification.
I live in a colder location but I have been very pleased with Aeroshell 15-50 in all of my motorcycles
You will have to go to a nearby flight service station at your local airport to purchase this oil.
Ashless dispsersants (ZDDP, etc.) in aero oils of any brand are not sufficiently robust for motorcycles. Aero oils need low dispersants to avoid plug fouling--aero engines are notorious oil burners. They can get away with low dispersants due to their very low operating rpm and correspondingly low necessary valve spring pressures, oversized wear surfaces, and premium materials and manufacturing process such as heat treating and induction hardening. Aero oils are very high quality base stock and not much else.