Elkman
Senior Member
By the way, for those running 2017 and newer trucks that require the use of the new motor oils that meet the API SP and API SN and SN Plus (cans have a Starburst symbol), the lab motor oil tests are worthless.
These new motor oils are much more effective at low viscosity and need to be with their 5W and 0W ratings. The oils have to meet much more stringent testing that is based on actual hours of engine operation where the engines are torn down and the parts are examined and the wear is measured.
The new test requirements cover kinematic viscosity increase at 40 degrees celsius, piston deposits, average cam plus lifter wear, cam wear, engine sludge, rocker cover sludge, engine varnish, oil screen sludge, hot stuck rings, cold stuck rings, oil ring clogging, bearing weight loss, aged oil low temp viscosity, phosphorous retention, high temp high shear viscosity (this is critical with multi-grade motor oils to avoid polymer shearing), evaporation loss at 250 degrees celsius, percent flow reduction with various level of water in the oil, foaming tendency and stability, high temperature foaming tendency and stability, homogeneity and miscibility, high temperature deposits, emulsion retention, and elastomer compatibility. None of this information can be provided by consumer oil analysis lab.
If an oil meets these specifications then it will do the job. For my 2018 SUV I use Mobile 1 simply because it is easy to find. Amsoil is not fit for my diesel truck with its poor additive mix and not reason to pay more for less. For the diesel truck I use Valvoline Premium Blue which also happens to be what Cummins uses. The Valvoline has one of the best additive mixes for diesel engine use and it is reasonably priced and it is also available at the local Ram dealer.
These new motor oils are much more effective at low viscosity and need to be with their 5W and 0W ratings. The oils have to meet much more stringent testing that is based on actual hours of engine operation where the engines are torn down and the parts are examined and the wear is measured.
The new test requirements cover kinematic viscosity increase at 40 degrees celsius, piston deposits, average cam plus lifter wear, cam wear, engine sludge, rocker cover sludge, engine varnish, oil screen sludge, hot stuck rings, cold stuck rings, oil ring clogging, bearing weight loss, aged oil low temp viscosity, phosphorous retention, high temp high shear viscosity (this is critical with multi-grade motor oils to avoid polymer shearing), evaporation loss at 250 degrees celsius, percent flow reduction with various level of water in the oil, foaming tendency and stability, high temperature foaming tendency and stability, homogeneity and miscibility, high temperature deposits, emulsion retention, and elastomer compatibility. None of this information can be provided by consumer oil analysis lab.
If an oil meets these specifications then it will do the job. For my 2018 SUV I use Mobile 1 simply because it is easy to find. Amsoil is not fit for my diesel truck with its poor additive mix and not reason to pay more for less. For the diesel truck I use Valvoline Premium Blue which also happens to be what Cummins uses. The Valvoline has one of the best additive mixes for diesel engine use and it is reasonably priced and it is also available at the local Ram dealer.