You guys running Amsoil. How many miles before you change?
Amsoil site says you can double mfg's rec oil change schd when running thier MCV 20-50 ooil for bikes so yami
rec's 4k oil & filter change so 8k miles max is the rec.
Most guys running Amsoil in thier R*'s change it anywhere from 5k miles to as high as 8k miles.
I run mobil-1 full syn 20-50 v-twin oil and change oil & filter at 6k miles max or 1yr,which ever comes 1st.
I contacted Mobil-1 oil tech srvc and they said 6k miles max before changing thier oil.
I run the mobil-1 v-twin oil because its esier to find locally then the amsoil but i may mail order the Amsoil for next oil change to see how it performs & or how my 06 silverado's motor likes it.