Originally Posted By: TFB1
I have M1 0W-40 in my 160 Honda, starts first pull, runs great, uses no oil...
M1 0W-40 is considerably lighter than T6 5W-40.
In fact M1 will be lighter on start-up even on a hot summer day than a straight 30wt oil.
Having said that, as mentioned no harm will come from running the T6, it's just heavier than necessary and will rob some power.