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Old 05-03-2023, 01:06 PM   #1
arjunkc
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Oil analysis advice

Hi yall,
My oil analysis at 15k miles about 4000 miles on the oil, and here are the results: blackstone says the copper is high. I track/autocross it about 10 times a year, and daily it as well. Any advice about what to do in the future? Shorter oil change interval/Longer oil change interval/More frequent/5W30 for track season?
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Old 05-03-2023, 01:18 PM   #2
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once is an anomaly, 2-3 times is a pattern.

do you go extremely easy on it until it's fully warmed up, or do you just send it all the time?
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Old 05-03-2023, 02:51 PM   #3
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"Just send it bro". Jk, Jk, I take it easy until it hits 195F on the gauge.
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Old 05-03-2023, 06:36 PM   #4
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This is not a bad report. 5 Parts per Million of copper is still nothing to get excited about. What brand oil?

If you auto-x 10x on that oil, I'd step up to something like Motul 300V 0w-20.

The fuel is more concerning to me as it impacts the oil quality. Typically, high fuel is a result of excessive cold idle, and can be resolve by changing that habit. Start the car and go, just avoid high load until your oil is up to temp. It can also be the result of very short drive cycles. By short, I mean 1-2 miles where not even the coolant gets up to temperature.
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Old 05-04-2023, 07:09 AM   #5
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This is not a bad report. 5 Parts per Million of copper is still nothing to get excited about. What brand oil?

If you auto-x 10x on that oil, I'd step up to something like Motul 300V 0w-20.

The fuel is more concerning to me as it impacts the oil quality. Typically, high fuel is a result of excessive cold idle, and can be resolve by changing that habit. Start the car and go, just avoid high load until your oil is up to temp. It can also be the result of very short drive cycles. By short, I mean 1-2 miles where not even the coolant gets up to temperature.
I guess I have that to look forward to in my report if Blackstone ever gets the oil I sent them lol
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Old 05-04-2023, 08:52 AM   #6
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This is not a bad report. 5 Parts per Million of copper is still nothing to get excited about. What brand oil?

If you auto-x 10x on that oil, I'd step up to something like Motul 300V 0w-20.

The fuel is more concerning to me as it impacts the oil quality. Typically, high fuel is a result of excessive cold idle, and can be resolve by changing that habit. Start the car and go, just avoid high load until your oil is up to temp. It can also be the result of very short drive cycles. By short, I mean 1-2 miles where not even the coolant gets up to temperature.
Thanks! Its about 2x auto-x and 8x track. I do idle sometimes, but most of the time i just start and go. My trips are short: about 5 miles.
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Old 05-04-2023, 10:58 AM   #7
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This is not a bad report. 5 Parts per Million of copper is still nothing to get excited about. What brand oil?

If you auto-x 10x on that oil, I'd step up to something like Motul 300V 0w-20.

The fuel is more concerning to me as it impacts the oil quality. Typically, high fuel is a result of excessive cold idle, and can be resolve by changing that habit. Start the car and go, just avoid high load until your oil is up to temp. It can also be the result of very short drive cycles. By short, I mean 1-2 miles where not even the coolant gets up to temperature.
Did you mean to say avoid high rpm? Not really sure why higher load at low rpm would be a problem as long as you don't lug the engine. Yeah, the afr is typically lower but more burn means more heat and that means everything gets up to temperature faster.
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Old 05-04-2023, 02:30 PM   #8
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Did you mean to say avoid high rpm?
No. Load is what tries to squish the oil film from between bearing and pin. Low load (torque) does not apply nearly as significant a force.


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Not really sure why higher load at low rpm would be a problem as long as you don't lug the engine.
Lugging the engine is very similar to high load low RPM. Either should be avoided, especially cold where oil flow is at its lowest.

Low RPM load puts significantly more strain on rod bearings. Each rod carries twice as much load making 100 ft/lbs at 2,000 RPMs vs 4,000 RPMs. At 4,000 RPMs that torque is spread over twice as many combustion cycles, meaning the rods get half as much load.
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Old 05-04-2023, 08:04 PM   #9
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How does one avoid high load?
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Old 05-04-2023, 10:51 PM   #10
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Be in the right gear for conditions. I.e. dont try to go uphill in 6th gear at 40mph.
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Old 05-04-2023, 11:09 PM   #11
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Drive it as if the gas pedal can't be pushed more than a quarter way down... -ish.

The car ends up slowing down going uphill even though the engine is revving in a lower gear, and it takes extra time getting up to speed.
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Old 05-05-2023, 03:44 PM   #12
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I never had copper in my oil but if you autocross I would highly recommend 5w30 at least until it gets cold out.
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Old 05-09-2023, 11:05 AM   #13
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I never had copper in my oil but if you autocross I would highly recommend 5w30 at least until it gets cold out.
Never ? Oh that mights me nervous for my report now lol. Coming in at 3 so 1 point over the average they list.
Using Mobil 1 super3000 5w-30 XE-1(euro stuff) lol
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Old 05-12-2023, 05:22 PM   #14
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Never ? Oh that mights me nervous for my report now lol. Coming in at 3 so 1 point over the average they list.
Using Mobil 1 super3000 5w-30 XE-1(euro stuff) lol

I actually went back and checked no my old engine since i just got my trucks oil back and i did have some. Id still recommend the heavier oil if you autocross tho
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