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06-11-2023, 10:30 PM | #21 | |
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Join Date: Apr 2019
Location: Kansas
Posts: 947
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Re: Best oil for V8
Quote:
Although I've tried it several times, I've yet to see any sludge loosened by modern oils. That stuff is so dense and settled/attached that only scraping and serious disassembly and cleaning will remove it. I ran a high mileage flathead 3000 miles burning a qt of 15w40 high detergent diesel oil every 200 miles (during summer) and the sludge wasn't affected at all. About 1/2"+ deep in the pan and large amounts in the valve chamber. Stuck like glue. Terry
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"It don't take but country smarts to solve the problem" (Smokey Yunick) '41 Merc Town Sedan / 260" 8CM engine '66 Fairlane four door / "warmed up" 302 |
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06-14-2023, 11:29 AM | #22 |
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Join Date: Mar 2011
Location: upstate NY
Posts: 479
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Re: Best oil for V8
I stumbled on this video on VR-1 oil.
https://youtu.be/W48nygk1mlc |
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06-14-2023, 11:37 AM | #23 |
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Location: upstate NY
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Re: Best oil for V8
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06-14-2023, 01:38 PM | #24 |
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Join Date: Sep 2020
Location: Mount Desert, Maine
Posts: 504
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Re: Best oil for V8
Shell Rotella 15-40 here largely because I use it for the tractor and noat
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06-14-2023, 01:39 PM | #25 |
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Join Date: Sep 2020
Location: Mount Desert, Maine
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Re: Best oil for V8
*boat
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06-14-2023, 03:08 PM | #26 | |
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Join Date: May 2010
Location: Daytona Beach, Fl & Spencer, W. Va,
Posts: 4,442
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Re: Best oil for V8
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Quote:
Detergents are added to hold/suspend contaminants in the oil until it can be drained. This prevents sludge from forming. Modern oils are FAR better than what was available 30-40 years ago. Many of us remember opening up an engine and it being one huge, nasty grease pit! Modern oils don't do that unless oil change intervals are pushed WAY past their recommended time frame. The main way people break loose sludge in a way that it clogs up passages is by using flushes. Some will add a quart of two of diesel/kerosene to the crankcase and idle the engine for a while before draining. This can help dramatically in clearing out sludge, but it can also clog up drainbacks, etc. Proceed at your own risk. lol
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