10-24-2022, 10:27 AM | #266 | |
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As far as I am concerned, you can use olive oil. I am just saying paper tolerates everything. You can put whatever label on bottle you want. UBER AMG, M3, GT-R, LFA, but that doesn't mean oil is good. Synthetic oils from 70's had huge amount of PAO and Esters, but they would obliterate gaskets. It took some time to realize that it is combination of base stocks, polymers and additives that counts. Manufacturers came up with approvals so people don't guess or fall for dishonest marketing. Of course, there are better and worse approved oils, but point is they are approved for a minimum and that minimum just happens to be actually very stringent. Also, Mobil1, Shell, Castrol, Total etc. are in this business forever. They have huge know-how, and that counts. |
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11-10-2022, 03:53 PM | #268 | |
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Bmw x5 with n54 engine after 14.000km Bmw 320i n20 engine stock after 10.000km Audi a4 b9 2.0tsi stage3 after 7.000km I changed the oil in these 3 cars, the oil came out very black in the x5 and the audi a4 I can say that it is identical to a diesel engine.... the 320i came out cleaner, I never looked at the color of the oil but today I was attentive , in my car the oil never came out so black, even after 8,000km, the conclusion is that even in street use and stock engine I would not exceed 10,000km, modified cars with mixed street/track use would not exceed 5000km, only track use, each trackday. Stay away from olive oil even for street use |
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11-10-2022, 04:34 PM | #269 | |
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11-10-2022, 04:50 PM | #270 | |
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The only way to determine if an oil can have a longer OCI or if the OCI should be shortened is via a UOA. Visual inspections for the most part are useless - with the exception of metallic fragements in the oil, the oil drains with an extremely odd color and or consistency (milky color indicating coolant contaimination, or the oil is completely gunked up) or an extremely burnt smell.
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11-10-2022, 05:30 PM | #271 |
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11-10-2022, 05:37 PM | #272 |
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Yes that is true, but it is hard to judge and be 100% oil is bad based on the color. You'd need to get a UOA to be completely sure, you'd need to see if there are any additives left via TBN, you'd want to see if it has oxidized too far via TAN, and silicon levels and metal levels will tell you how much particulate is in the oil. So it really is hard to tell if an oil is good via color alone.
Generally speaking I don't like letting oils go past 7500 km before changing it, because oil changes are cheaper than engines so it is a cheap precautionary measure. So yes sooner is better than later, but if you don't want to waste your money doing super early oil changes, or do alot of driving and don't have the time to constantly do oil changes, a UOA can tell you if you can extend your OCI a bit further to optimize every oil change.
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11-10-2022, 05:52 PM | #273 |
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Yeah but what if a certain oil just captures them better instead of leaving them on surfaces? You could design an oil that would come out amber color and not suspend any of the contaminants, but it would be a bad oil.
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11-10-2022, 06:04 PM | #274 | ||
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It is not worth saving a few bottles of oil because later the breakdowns is much more expensive. Quote:
A lot of crap must have the engine for the oil to be black with 7000km. Last edited by Track/S; 11-10-2022 at 06:19 PM.. |
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11-10-2022, 07:03 PM | #275 |
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11-11-2022, 12:52 PM | #276 |
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11-14-2022, 08:48 PM | #277 | |
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If you are not spending considerable amount of time on track, stay with street oils, and this is not street oil. |
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11-14-2022, 08:55 PM | #278 |
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Judging oil by color os absolutely ridiculous.
Several possible scenarios: 1. Light color after 5k could mean that additives in that oil are not doing its job. 2. Dark oil after 5k: oil is doing its job. Additives are cleaning and suspending contaminants All good. 3. Number 2: BUT, dark oil might also mean excessive oxidation. Oxidation is not problem per se , especially if oil have esters and have already high oxidation from get go. Also, oxidation is not a problem if base number is still high. It is important that acidic number doesn't overshoot dramatically base number. That is absolutely impossible to determine from looking at the oil color. So UOA is only appropriate way to determine state of oil. |
11-16-2022, 08:01 AM | #280 |
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11-16-2022, 08:27 PM | #282 |
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11-16-2022, 08:41 PM | #283 | |
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There is really no adverse effect in N5X engines to run 0W30/40 A3 oils. BMW increased dramatically already tough oxidation requirements in 2018. I would though still use approved LL01 or LL04 in N20/26 engines as all BMW approvals now must pass N20 timing chain test. |
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12-03-2022, 10:56 AM | #285 |
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12-03-2022, 02:07 PM | #286 | |
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Also when i changed my oil it may have been the light, But it seems to have a slight red tint to it. Normal lol? It was 90% dark color oil and like a 10% tint of red, could barely tell unless you looked hard. 4,500 mile oil change, it was a bmw oil Anyone experience a slight red tint when draining? Maybe it was the suns color rays cus in the oil drain pan i had it in it just looked a regular dark like how it should. no red tint so i think it was the suns color rays EDIT: Heard it was normal and its just the additives reacting. Just looked like regular oil when in the drain pan though. So it was probably the sun as people in forums have reported the same thing
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