Not to start any argument here...... But Have any of you out there heard of or seen any engine (4 cycle) fail from the running WRONG the kind of oil. In my opinion something is better than nothing. Lets not confuse this with a "Ran low or no oil" situation. Example: Manufacture calls for #30 wt and someone dumps in 15w40 and the engine blew up. Not looking for any arguments here.:thumbsup:
Yeuuup..several.
One that sticks is waaaaay back before UL fuel was around
a product "rimula(sp) X" was touted as good for all diesel engines
with crossover propeties that allowed it's use in leaded petrol engines.
That construction project was huge, and remote.
Some who ran the oil in their "go home" vehicle didn't get home on
that engine. We also lost two of the 60HP Duetz AC potable water pumps
before a change was tried and worked. Those engines required an air chisel
to remove the tar from the crankshaft in getting a look at what damage
there was.
I can recall some outboard engines (2cycle). May not count?
And some racing tuned motorcyles running "one day one run" wonder oils.
Also may not count.
Thing is this discussion is focused on AC 'light duty' engines.
It's frightening on the amount of misinformation out there and also
the degree of reliance on "I use this and it is GREAT" with absolutely
no science as creds.
Fir engines that are largely goverend and low duty cycyles
(8hrs mowing is not heavy duty by any measure, friends)
oil should be so simple, as your post implies, yet I personally have had
three differing opinions(?) quoted at me as "Gospel Truth" when asking
the question of mower dealers and mower engine reps.
Quite frankly (candidly honest) I have reached that point which says to me
the AC mower engine users/dealers and many 'repairers' do not know what
they are talking about . Simply put, a lot of bias and very little clue.
..... back to you, I will ignore the harpies ;-)