Reply To: Engine Oil GV 125 (carb)
Winter Time (under 15 *C temps in the air) , basically cold days = 10w40 is fine. I would get Silkolene Pro 4 or Comp 4
Actually find any oil that has ESTER (that’s usually Silkolene Pro 4 or Comp 4) or (Motul 7100 , 300V)
Fully synth is best.
10w30 is too thin, it will break down faster than a 10w40 would.
Personally i prefer to use Motul 7100 at 10w50 or 10w60 all year round even on hot summers. It’s “probably” the best oil for the hyo twins. (Though the manual says use “more expensive oil if you can” to extend engine life)
Why 10w50 (50/60 means it can break down less than a 40 grade)
“10w” only , don’t get 5w , 15w, 20w ==== 10w is the perfect spot. 5w is like water. 20w is like sludge, too thick. Stay on 10w(40/50/60)
Silkolene Super 4 = Use this only if you can’t get the better ones (Comp 4 / Pro 4)
Hope that helps