Just that he frothed the gear oil up before adding the Lucas product then he blames the mixture of frothing even more. Who knows what would have happened had he started with non-frothy gear oil to begin with? We'll never know.
Also, he's trying to kill two birds with one stone, which doesn't fly with the scientific method. He's trying to compare organic oil and synthetic oil, and the Lucas additive at the same time. He never tests the organic oil with the Lucas product, yet concludes it would be bad for organic as well. Sorry. No dice.
He's also trying to use the organic oil as some sort of control, but that fails as well.
Then he tests the engine oil in a gear environment. He even admits this isn't a typical thing to do.
I'm not saying Lucas or other additives are good for anything, just that his "experiment" is not valid. I do like that he tried to replicate the display technique used by Lucas and makes a good point that the speed of the gears is a missing factor in those displays.
If it were me I'd have used identical gear oil on the left and right, adding the Lucas product to the right only after a base run was done at both slow and fast speeds. Repeat slow and fast speeds with oil and oil + additive mix.
Do this twice, once for organic and once for synthetic gear oils.
Then I'd find a better way to represent what engine oil goes through before doing the same with engine oil. If I couldn't do that, I'd go the same as above with the engine oils, but make sure to explain as best I could that the experiment might not be true to life.
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Originally Posted by 91grayDET 
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