the weight of oil viscosity weight is strictly related to temperature of operation. there is no set rules for it since anew engine will benefit from less dense oil an old wore out engine will not.
The 2004 BMW 325CI came equipped with two 2.5L 4-cylinders (engine codes M54 and M56). Both engines factory require European specification synthetic 5W40 meeting BMW Longlife-04.
what oil viscosity should i use a gsx 1400
You should use 5W30. That is the recommended weight.
5-30 weight SM rated oil.
5W30
The manufacturer recommends that you use 10W-30 weight oil. 10 W-40 weight oil can be used in high mileage engines.
Factory said to use 5W30 weight.
If it is not burning any oil use 5w30. If it is burning any oil use 10w30.
The oil capacity of a 99 Ford Escort is 4 quarts. Use 5W-30 weight oil. Use a SM rated oil which is the highest rating.
5W30 weight.
Recommended oil is 20w50
5w30