Mobil 1 vs. Rotella - Defender Source
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  #1  
Old April 20th, 2008, 03:24 PM
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Phillip
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Mobil 1 vs. Rotella

Almost hate to ask but what do you folks think has the better detergent? Ive been running the Mobil for like 30k so I imagine things are pretty clean. Just bored. I am going to do the passenger side valve cover again and will be anxious to see how things look after the Mobil diet.
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  #2  
Old April 21st, 2008, 10:28 AM
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John B.
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Are you talking for a diesel?? If gas, then why talk about Rotella as that is a diesel engine oil? If there is any build-up whatsoever within any engine, you are so far from using a good oil, it is not worth having a conversation....

Mobil 1 should not be used in a diesel.

Mobil makes two oils suitable for a diesel. Mobil Delvac 1 and Mobil Turbo Diesel Truck 5W-40. AFAWK, they are both the same fluid in different bottles. It is probably the best diesel engine oil on the market.

However, the differences in performance between those oils and Shell Rotella T 5W-40 will be small.
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Old April 21st, 2008, 05:51 PM
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Randy
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I have used the Rotella since my Tdi was new. I like it. I would like to go to a synthetic but was told that It could start leaks in the engine... I have none as of now. I would go to the Mobil 1 though. Don't know how true the leaking is though.
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  #4  
Old April 21st, 2008, 06:17 PM
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Chris Snyder
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I've switched both my trucks over to Mobil 1 from dino oil and have noticed no increased leaking. Not sure what started that rumor.
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