srdancer90
Member
I live in the north east, and have used Shell Rotella straight 40 weight oil. As this is difficult to obtain, I was told by a Shell tech that I could use the Rotella 15-40 oil. My question is at what temp will the multi vis oil reach it's 40 weight. My engine runs at 158-159 all day, and takes 5-6 min to get there, so am i safe to say that the oil is not at 40 before the full operating temp range.The shell tech said that the start up will have better protection with the 15-40, yet I am wondering if the time it takes to reach full operating temp will not allow the oil to be at the required 40 weight range and will eventually harm the engine. any advice on this.
2004 320 Da T/5.7 350 mag mie
2004 320 Da T/5.7 350 mag mie