15w 40 engine oil can be used for all temperatures down to -15 deg centergrade !
A diesel engine would use 15w40 a gas engine could use 15w40 or 10w40
generally 15w40 or heavier
15w40 rotella
The W stands for Winter. 15w40 is flows as 15 weight oil in the cold temperatures and 40 weight oil when it gets to full operating temperature.
-30
Gas engine, 10w30Diesel , 15w40Gas engine, 10w30Diesel , 15w40
castrol 15w40 CRD oil
15W40
There should be no problem with mixing them.
-20F to +100F
5w20, 5w30, 15w40. It depends on the engine and operating conditions.5w20, 5w30, 15w40. It depends on the engine and operating conditions.
Gas Engine: 5w30 Diesel Engine: 15w40