07 FLHRI( OCI@ 5K mls.)
I'm presently using the Amsoils 20W-50 for motor. When reviwing several HD websites and Blackstone Labs oil test reports; I only found one test done on a Twin cam FL model, using Mobil 1 15W-50. Apon a 5000+ml OCI,according to Blackstone, that the Mobil 1 15w-50(auto)oil had near no viscosity breakdown, w/a good base number(or most chemical components entact). I've noticed most HD owners submiting tests whom are using a longer(5000+ mile OCI )are using a premium syn moto oil w/little vicosity breakdown. a few tests for HD Motors using syn auto oils are of low mile tests are at similar results. It seems if a syn moto oil is used, to go to 5K OCI, and if ANY (non energy conserving) petroleum oils are used, OCI should be between 2.5-3K mls. I'm not sure about using a similar AUTO syn oil in our Harley Twin Cam motors w/a long OCI. I guess I'de like to see more test results on paper w/ long OCI for M1 15W-50 or similar syn auto oils before I switch out my Amsoil 20w-50. The difference in costs comes to around $5/QT.
Thanks
HR
I'm presently using the Amsoils 20W-50 for motor. When reviwing several HD websites and Blackstone Labs oil test reports; I only found one test done on a Twin cam FL model, using Mobil 1 15W-50. Apon a 5000+ml OCI,according to Blackstone, that the Mobil 1 15w-50(auto)oil had near no viscosity breakdown, w/a good base number(or most chemical components entact). I've noticed most HD owners submiting tests whom are using a longer(5000+ mile OCI )are using a premium syn moto oil w/little vicosity breakdown. a few tests for HD Motors using syn auto oils are of low mile tests are at similar results. It seems if a syn moto oil is used, to go to 5K OCI, and if ANY (non energy conserving) petroleum oils are used, OCI should be between 2.5-3K mls. I'm not sure about using a similar AUTO syn oil in our Harley Twin Cam motors w/a long OCI. I guess I'de like to see more test results on paper w/ long OCI for M1 15W-50 or similar syn auto oils before I switch out my Amsoil 20w-50. The difference in costs comes to around $5/QT.
Thanks
HR