There are things I worry about, but foaming engine oil isnt one of them. I've used plenty of Rotella in my work and private life. Never an issue. IMO all the major branded diesel oils are decent. I always preferred Mobil, but thats mostly loyalty to the brand as I have always had good luck with...
Pablo, at one time I owned and operated a Candian fishing lodge with many Yamaha outboards of various sizes. The non oil injected ones all called for 100:1 mix oil ratio. What we found was that motors ran on 100:1 started to lose a bit of power significantly sooner than those ran at 50:1...
One other thing. Red Armor formulation changed a few years after the initial marketing was put out. It was an ester blend. It appears it no longer is last I checked.
Various years from 2003-2008. 90hp 70hp 30hp 3 cyl, 25hp, 15, 9.9, 8, 6 off tge top of my head. The largest number being 25hp models.
We ran one a bulk tank with 50:1 mix. The injected models got 50:1 and oil injection.
We ran all tge camps for cycle stuff on the same mixed fuel too.
BTW this motor has for most of its 5 year life ran on Red Armor starting from new. Its a decent oil, bu the stuff isnt magic. There are other cleaner oils out there.
In the first video it shows very minimal change in the transfer port wash. What did change greatly is the RPM of the motor both at idle and at peak. A properly tuned motor will run cleaner.
The other is just marketing drivel.
When I get a chance I will get some more Red Armor and document via pictures what the engine looked like before and what it looked like after with bore scope pictures.
Good, post a link to one.
I inspected with a bore scope...
The only thing that will remove carbon from a two cycle piston crown is running the motor excessively rich while under