10w30 the recommended weight.
Should u use 10w30 or 10w40 in the winter
4.2 quarts of any engine oil 10w30 or 10w40 for summer.
10w30 in the summer and 10w40 in the winter.
Yes, as long as the ambient temperature is above fifty degrees.
10w30 or 10w40
not recommended
There should be no problem with mixing them.
10w30 or 10w40 should work fine in most climates.
10w40 is thicker (but only when hot, they are the same thickness cold.)
As long as the engine is ok you can use: 10W30 10W40 I recommend using Vavoline.
10w40 or 10w30