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post #1 of 32 (permalink) Old 05-12-2019, 06:42 PM Thread Starter
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Just recently installed JB4 stage 1 which I love . But I need to change my oil soon
Should I go with 0w-20 or 5w30?
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post #2 of 32 (permalink) Old 05-12-2019, 06:43 PM Thread Starter
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A little concerned only because I’ve seen a few people post about a blown engine
Will that happen at +3 psi?
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post #3 of 32 (permalink) Old 05-12-2019, 07:57 PM
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Both oil viscosity you mentioned are recommended per owners manual. Most owners I've seen are more comfortable with 5w-30.



There is little to no direct link between blown engine and oil viscosity used in VR30, unless we're talking about oil starvation. You may be seeing viscosity thinning due to fuel dilution overtime but no conclusive evidence that it'll cause blown engine. I think the common concurrence among owners is to change the oil sooner, e.g. 4k - 6k. I also don't think +3psi on JB would cause a blown engine either, especially on 300hp Sport trim like yours. You'd probably need to consult max how he did it (blown engine) though using JB4.

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post #4 of 32 (permalink) Old 05-12-2019, 08:03 PM
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Boost in motion does some great videos on you tube about his map 6 that will make you feel so much more comfortable with the JB4.
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post #5 of 32 (permalink) Old 05-12-2019, 08:06 PM Thread Starter
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Thank for all the info. I’ll consider 5w30
As for changing map settings I don’t think I can as I don’t have the Bluetooth capability
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post #6 of 32 (permalink) Old 05-12-2019, 08:23 PM
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Fuel in your oil is the main issue in our cars with increased boost. Do not go over 5,000 miles between oil and filter changes. Blackstone told me to change mine between 3,000 and 4,000 miles. My % was 2% previously and 2.5% this last time. Both were at 4,000 miles.

From Blackstone:

JOHN: Fuel has been a pretty consistent finding for your Q50, but it increased this time to above 2.0%. It
could be a sign of a fuel system problem, or maybe it's the result of the tune you mentioned. Wear metals look very good for time on the oil, considering that this oil run was similar to the last, so the fuel isn't causing any obvious problems that we can see. It didn't thin the oil below grade, either. The TBN was 3.7, so there was active additive remaining in the oil, but keep oil runs in the 3,000-4,000 mile region while significant fuel is present in the oil.

Last edited by JohnInNH; 05-12-2019 at 08:25 PM.
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post #7 of 32 (permalink) Old 05-13-2019, 09:21 AM
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Just made the jump to 5-30. It's hot here and the added weight should help. Also, if you do racing, its typically recommended to over fill by 1 qt.
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post #8 of 32 (permalink) Old 05-13-2019, 10:01 AM
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If you're going to turn your car up, use 5W-30.

To echo what Ddnspider said, .5-1qt overfill is recommended.

John, more spirited driving (warmer weather?) on a tuned car will cause that increase.

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post #9 of 32 (permalink) Old 05-13-2019, 10:45 AM
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Quote:
Originally Posted by Loring View Post
If you're going to turn your car up, use 5W-30.

To echo what Ddnspider said, .5-1qt overfill is recommended.

John, more spirited driving (warmer weather?) on a tuned car will cause that increase.
I'm still in the 49-50 deg weather so am staying at 0-20. Also, why AS tires are my summer tires due to low pavement/air temps. Snow tonight!!!

Yep, a bunch of hot pulls b4 my oil change. Seating in my brakes AND short trips before the drain. The catch can is getting some of it.
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post #10 of 32 (permalink) Old 05-13-2019, 10:57 AM
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Quote:
Originally Posted by Ddnspider View Post
Just made the jump to 5-30. It's hot here and the added weight should help. Also, if you do racing, its typically recommended to over fill by 1 qt.
Never, never, never overfill. It will cause foaming and may push more oil out of the breather resulting in more deposits on the intake valves. Could you please quote the credible source of this information? And please don't say "people on the internet".

If you feel that because you are racing and need more capacity get a bigger sump. If you feel that the extra oil will result in lower operating temperatures, get an oil cooler. Don't overfill.
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