Little story.
I told him I've been using $20 a GALLON Shell Rotella for the last 100,000 miles. Everything from 0w-50 on up. Engine still purrs like a kitten, original clutch, burns no oil. The only time I use synth is when I'm doing a LONG trip so I don't have to change the oil mid-trip.
"Give your damn head a shake" I said to him. All the rest of the card-carrying members of the Harley pot-bellied festival were all up in arms and filling his head full of horror stories about a guy they knew who didn't use the proper oil... Then the started in on me as I obviously don't know what the **** I'm talking about (combined, these guys ride 5000 miles a year) because I don't ride a bike produced by THE Motor Company.