Type of Oil
Registered User
Joined: Jul 2009
Posts: 227
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From: AL
I agree somewhat. I don't mind paying more for quality most of the time. But there probably isn't anything that truly shows RP is a higher quality oil than Mobil1. It's merely a persons opinion of what is "best".
Like I said, I used RP for 3 changes. What really irks me about them is they raised their prices significantly when oil hit $147, yet they have still not lowered their prices now that oil is half of what it was. That's pure greed. Meanwhile, Mobil1, Rotella, Delo and others have lowered their prices by about 15-20% or so, since the barrel costs dropped.
Like I said, I used RP for 3 changes. What really irks me about them is they raised their prices significantly when oil hit $147, yet they have still not lowered their prices now that oil is half of what it was. That's pure greed. Meanwhile, Mobil1, Rotella, Delo and others have lowered their prices by about 15-20% or so, since the barrel costs dropped.
Registered User
Joined: Aug 2006
Posts: 148
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From: San Francisco Bay Area
If you have the 5.9 engine, install a bypass filter, and do oil analysis then it pays to use a high quality synthetic oil. As long as your analysis comes back clear you can run the oil long enough that it will more then pay for itself, and you get the other synthetic oil benefits mentioned above. I question whether it is worthwhile with the 6.7 engine because of the potential for fuel dilution of the oil over long run times due to raw diesel being injected on the exhaust stroke to heat the DPF when it cleans itself.
DTR 1st Sergeant
Joined: Apr 2007
Posts: 5,530
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From: Applegate, CA
In my opinion, if you run a lightly modified truck, you can see a great deal of cost benefit by running a good synthetic combined with bypass filter. I was between 15-20k miles between changes and had very good UOA's. This was using Schaeffer's 9000 or Amsoil.
With a heavily modified truck, a great deal more soot ends up in the oil causing more frequent changes in spite of the bypass filter. Then it is more cost effective to use dino and more frequent (5-7k miles). Delo has a flashpoint competitive with synthetics although none of the CJ oils has enough of the protective properties that the syns have. That should allay some of the high temp fears. I still run syns and just eat the cost on more frequent changes.
With a heavily modified truck, a great deal more soot ends up in the oil causing more frequent changes in spite of the bypass filter. Then it is more cost effective to use dino and more frequent (5-7k miles). Delo has a flashpoint competitive with synthetics although none of the CJ oils has enough of the protective properties that the syns have. That should allay some of the high temp fears. I still run syns and just eat the cost on more frequent changes.
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kram
3rd Gen High Performance and Accessories (5.9L Only)
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Aug 29, 2007 11:01 AM