Yes, semi synthetic is a blend of synthetic and conventional oil already.
You can mix part synthetic oil with full synthetic oil.
Yes, many believe that you can not mix any oil blend together. This is not true, full synthetic can be mixed with conventional also with no harm. If this is done, there is just wasted cash when buying the synthetic.
It might be... It's highly not recommended to mix regular and synthetic oils.
Yes, it is actually sold that way. It is called semi synthetic.Yes, it is actually sold that way. It is called semi synthetic.
Yes, they can be mixed.
YES! "Regular" oil is what is mixed with synthetic to make semi-synthetic. Try to use the same brand. I've heard it's not good to mix the different additives that different companies use.
use good quality 2-stroke pre mix (tcw2/tcw3) tcw2 semi synthetic oil tcw3 full synthetic oil I use klotz tcw2 in my 72 Yamaha r5
Yes, service stations will often call this a semi sythetic oil change.
Yes, service stations will often call this a semi sythetic oil change.
No, you could mix with synthetic blend but its not recommended.
Yes, and you can even mix it with conventional oil.
The Yamaha RXS is a Posilube system ie: a small pump supplies the engine with the correct ratio, Use semi synthetic, or full synthentic 2 stroke oil for clean virtually smokeless exhaust.