Oh, dude, it's like this - the numbers represent the viscosity of the oil at different temperatures. The "15w40" means the oil flows like a 15-weight oil in cold temperatures and a 40-weight oil in hot temperatures. The "15w50" flows like a 15-weight oil in the cold but a 50-weight oil in the heat. So, the main difference is how thick the oil gets when things start heating up.
15W40
In an emergency, no. Change the oil ASAP. If it's an emergency.... only if you have to do so. It can hurt it. Diesel oil (15w40) is different from 10w30. There are different additives, different qualities, and the viscosity is also different.
15 is thicker oil and for bigger engines.
15 is thicker oil and for bigger engines.
Never heard of 11w40. Would have slightly thinner cold properties that 15w40. Second Opinion: I've never heard of 11w40 either. As far as I know there is no such thing.
Not recommended because diesel oils have different Additives.
12 quarts of 15w4012 quarts of 15w40
It takes 15 quarts of 15W40 diesel oil I highly recommend Rotella 15W40
9.5 quarts.15w40 conventional or 5w40 synthetic.9.5 quarts.15w40 conventional or 5w40 synthetic.
Only the weight of the oil, 20w 40 is thiker than the 15w40, 20w 40 is the best oil for the old cars although 15w40 is very easier cold start ...
A diesel engine would use 15w40 a gas engine could use 15w40 or 10w40
5w20, 5w30, 15w40. It depends on the engine and operating conditions.5w20, 5w30, 15w40. It depends on the engine and operating conditions.