I was in my local Costco yesterday and noticed where the familiar Delo and Rotella oil used to be was Kirkland brand Diesel oil. I asked about it and the reply was that Delo and Rotella were not on the order list. I also asked who produced the Kirkland oil and was told it was Warren Manufacturing (if I recall correctly). Can anyone shed more light on this?

 

I also have noticed that my Costco doesn't carry the Delo or Rotella any longer. I use the Rotella T6 5w40 year round, no issues. If I were able to use the 15w40 year round, I wouldn't have any issues with the Kirkland 15w40.

 

I get my Rotella from Amazon......Ben

 

how often do you change oil

 

I always change the oil & filter at 5000 miles. I disregard the time limitation because I don't drive that much, otherwise I would change at 2500 miles. The engine might be happy, but my wallet wouldn't.

 

At the current Amazon price of $71.00 for 3 gallons of Rotella T4 and $15 for a Fleetguard filter, mine would be screaming......Ben

 

Just to add to the topic, I change my oil , oil filter and grease the front drive shaft every 5000 Miles. I use the Shell Rotella T6 5w40, truck does well with the T6.