I normally change my own oil and I use Shell Rotella T6. I realize from reading several of the posts on here there are many of you as well that use this oil. I just went to Walmart and picked up my oil and filter and my oil change costs me about $90. I decided to call the dealership and see what they now charge for a full synthetic oil change to see if the savings is worth my time. I was quoted $221 for a synthetic blended oil change with an oil additive (for lower operating temps per quote). I was told from the "shop foremen" a bulletin was written by Ford to the dealerships indicating for them not to use a full synthetic oil because it does not properly lubricate the top end of the engine and the Rotella T6 or Mobil 1 does not have the required detergents the engine needs contrary to the label.
I explained how my diesel supplement manual calls for 5w-40 under there severe service due to my driving conditions, which was itemized in that manual and I was just following the manufacturer recommendations. Once again I was told the newest info is use a synthetic blend and not use 5w-40.
So I am reaching out to all of you to see if anyone else has heard this and am I ok still using the Rotella T6 (5w-40) or should I switch to the Rotella T5 (10w-40). I am hoping someone who works at a dealership or anyone can confirm or deny what I was told.
I explained how my diesel supplement manual calls for 5w-40 under there severe service due to my driving conditions, which was itemized in that manual and I was just following the manufacturer recommendations. Once again I was told the newest info is use a synthetic blend and not use 5w-40.
So I am reaching out to all of you to see if anyone else has heard this and am I ok still using the Rotella T6 (5w-40) or should I switch to the Rotella T5 (10w-40). I am hoping someone who works at a dealership or anyone can confirm or deny what I was told.