It varies depending on the year, make model and engine of the vehicle. Check your owners manual, it should have recommendations for which oil to use for which heat range.
oil is oil like Yamaha recomends yamalube..its bull.sheet. they just want money..i use 5w30 or 10w30 most likely 10w30 in summer..i use valvoline synthetic in cars snowmobile and ATV, its the 3rd best oil if you want use amsoil that the best oil on planet...it allows you to do 25k mile change intervals in a truck or car
20w50
the best oil to use is olive oil. It taste is perfect
realease the old oil and then use the oil that you want to use make shure to use thin oil in the colder monthes and thick in the summer
Always use manufacturer's recommended oil where you will be guaranteed to have many more miles of smooth driving which is gentle on the engine which in turn will allow the engine to go on and on and on
best oil to use in 7.3 diesel is rotella brand oil
The best oil to use is the one reccomended by the manufacturer.
In the summer I use 10w-30 in my '89 Sierra in the summer I use 10w-40
Yes
The best oil to use is 5W-20, any brand.
30W for summer
In the summer you may want to use a oil that is a little thicher 10w-40 and in the winter use 5w-30