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Originally Posted by DieselJim
Delo is the funny looking container? Its ok. Who says it is a much better oil? I imagine all the high end heavy duty diesel oils are fairly similar. Rotella has been the marquis brand for a long time. I will decide which one I like best. Plus Walmart has different prices in different markets....
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Independent testing says that Delo is a better oil, I don't know about being MUCH better though. Rotella has a higher parafin content and Delo multigrade has shown to maintain it's viscosity index improver effectiveness over a longer period of time and heat cycle conditions.
As far as popularity, Delo is used by the truckers every bit as much if not more so than Rotella. In fact I expect that with the truckers Delvac is probably used more than Rotella.
All that said, it is splitting hairs. All of them are excellent oils for a diesel engine. I wouldn't hesitate to run Rotella if that was all I could get.
Have a great day,