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Old 07-24-2019, 02:22 AM   #11
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Default Re: Can of Worms: What oil do you guys use in tuned vehicles?

Amsoil 15W40 Syn Diesel/Marine

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Old 07-24-2019, 09:33 AM   #12
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Default Re: Can of Worms: What oil do you guys use in tuned vehicles?

Penrite HPR5. Its cheap and is 229.5 approved, which is one of the most stringent specs of any spec (except emissions specs). Without DPF I would use any 229.5 or 228.5 officially approved oil for long drain, or 229.3/228.3 for short drain. Depending on price and availability.

The problem in that comment about running an oil forever is that the acids will eventually use up the TBN. No amount of filtering or bypass filtering is going to remove those acids.
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Old 07-24-2019, 12:56 PM   #13
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Default Re: Can of Worms: What oil do you guys use in tuned vehicles?

Yeah, but you will be adding oil every 8-10k miles due to consumption. So with a really good oil you could in theory avoid changes. Though bypass filtration, and the complex requirements it creates, is a solution in search of a problem. If it was capable of extending engine life significantly, you would see it used on industrial and heavy vehicle engines.

There are many kinds of wear, and filtering out 1 micron soot particles has a minimal effect....
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Old 07-24-2019, 01:24 PM   #14
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Default Re: Can of Worms: What oil do you guys use in tuned vehicles?

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Originally Posted by Midwestdrifter View Post
...Though bypass filtration, and the complex requirements it creates, is a solution in search of a problem. If it was capable of extending engine life significantly, you would see it used on industrial and heavy vehicle engines.

...
I agree. Even the newer NCV3 engines seem capable of achieving multiple 100,000 miles service life using the OEM oil filtration and regular oil changes. How many owners need to worry about adding a few percent more to that capability?

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Old 07-24-2019, 01:35 PM   #15
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Default Re: Can of Worms: What oil do you guys use in tuned vehicles?

An interesting read I had a few months ago. In some lab testing they found that high levels of zinc (ZDP) actually increased wear with the high soot concentrations found in diesels. My take after some reading, is that the "thin" low sulfate/phosphate ash oils currently offered, are as good as, or better than the API spec oils offered up to about 2000. Honestly any Heavy duty diesel engine oil that meets the current API spec will provide excellent service, even at 10k intervals.

Instead of wasting time trying to find the perfect oil, or bastardize your oil system with a bypass filter; you would be better off spending that time checking every fill up for contaminated fuel. Or checking your intake system for leaks, or monitoring your cooling system performance.

Or better yet, just send your oil in for analysis every 20k miles. That will take your time and money, and produce very useful information, and get you advanced warning of a large number of failures.
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Old 07-25-2019, 01:15 AM   #16
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Default Re: Can of Worms: What oil do you guys use in tuned vehicles?

Strongly agree. And good synthetic oil and OEM filters are so cheap these days it is rude to not change it more regularly if you are at all worried about wear. This was not always the case, synthetic oil used to be prohibitively expensive, hence the creation of the snake oil additive, oil bypass, and toilet roll filter industry.
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