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The BMW M62TU engine is known to have problems with the VANOS unit due to failing seals in the VANOS pistons which harden over time. The idea behind using Wynn's Engine Oil Stop Leak is to increase the concentration of di-isononyl phthalates in the oil to keep the seals flexible. Although I have...

Of course BMW will not recommend using any additives on their engines, neither will any other car manufacturer. They also do not recommend using oils without the proper specification for a particular engine. But that does not mean that there are better oils available. In fact, if they...

Basically the reason that I am using so many additives is based on the fact that I am a layman with respect to Lubricants and Lubrication (in fact reading the book of the same name did not help much either ) When I got my first BMW I tried to figure out which is the best oil and additives to...

According to Blackstone the universal average for copper is 6 ppm at 8,800 km.

Dear All, Please find below the results of the latest and the previous oil analyses for my BMW. During this oil change interval I started using the Auto-RX additive, which seem to have a quite interesting story associated with it with respect to which reasons led to its invention and the...

By the way: in the Blackstone report, what exactly does TR stand for in case of insolubles?

As before I am using the Wynn's Engine Oil Stop Leak mainly to "re-soften" the VANOS seals, which finally seems to work out as expected: the engine has full torque (at least it feels like that) in the lower RPM range and the average fuel consumption dropped?! I still try to avoid touching any...

Dear All, Please find below the results of the latest and the previous (Mobil 1 Peak Life 5W-50, BMW E39 540iA, 27262 km) oil analyses for my BMW. This time I had Blackstone performing the oil analysis, as I had been curious whether ordering a test kit and sending it to the USA would actually...

Originally Posted By: vinu_neuro If you are only going based on the water temperature gauge, the oil hasn't reached operating temp at that point. Correct! That's why I additionally wait an arbitrary amount of time (based on some kind of weird feeling) from that point on However, the latest...

Originally Posted By: CATERHAM You made reference to waiting for your oil temp's to stabilize. What temperature is that and what are your maximum oil temp's after a long 200+ km/h run? Unfortunately, I haven't got an oil temperature gauge, yet. The sensor is already in place but not yet...

Hi! Sorry, I forgot to reference the previous oil analysis: Mobil 1 Peak Life 5W-50, BMW E39 540iA, 22081 km Mobil 1 Peak Life 5W-50, BMW E39 540iA, 17762 km LM Top Tec 5W-40, BMW E39 540iA, 7200 km This time I added 3 times 325 ml Wynn's Engine Oil Stop Leak as sealant maintenance and 1000 ml...

Originally Posted By: Quattro Pete Quote: The base number BN is considerably lower than expected. Do you tend to change the oil when the car tells you or do you follow some other schedule? Actually, I am completely ignoring the car's oil service information since I am trying to gather this...

Dear All, Please find below the results of the latest and the previous (Mobil 1 Peak Life 5W-50, BMW E39 540iA, 22081 km) oil analyses for my BMW. During this oil change interval I again used 100 % E85 fuel with a modified ECU mapping. Unfortunately, I missed to change the oil prior to maximum...

In fact the VANOS seals are a known problem at BMW's (E38/E39) TU engines, see e.g. http://www.beisansystems.com/ which offer new (better) VANOS seals as a replacement in case the VANOS unit starts to have problems either by some rattling noise or by loss of power in the lower rev range...

@Hokiefyd: The base number BN is indeed equal to the Total Base Number ... @skyship: The engine does not burn any oil nor has it any leaks, i.e. the oil level is constant over the complete oil change interval. I am using the Wynn's Oil Stop Leak as a sealant maintainance, i.e. trying to keep...

Dear All, Please find below the results of the latest and the previous (Mobil 1 Peak Life 5W-50, BMW E39 540iA, 17762 km, LM Top Tec 5W-40, BMW E39 540iA, 7200 km) oil analyses for my BMW. During this oil change interval I again used 100 % E85 fuel with a modified ECU mapping. Except for a...

Originally Posted By: JAG The PQ-Index exceeds the iron significantly so the iron wear particles are on the large end of the spectrum and iron reading are probably underestimated accordingly. Still, it's a decent UOA. According to an OELCHECK engineer every value below or equal to 25 is...

Here is the original quote (one of, actually) where Sterndocktor mentions Wynn's Engine Stop Oil Leak: Welches Motoröl. Basically he says, that ... no additional additives are necessary except for one, which is a good maintainance product for elastomer sealings ... In contrast, the information...

Actually, adding Wynn's as a sealant maintainance goes back to advices of a Mercedes engine developper who was very active some years ago in a popular German forum with respect to topics about internal combustion engines and lubricants and lubrication. Thus, at least from what I have learned...

The PQ-Index is explained here: What exactly is the PQ index, ... I am always warming up the engine thoroughly, never leaving the engine half way to its normal operating temperature. When the engine is heated up properly, i.e. the coolant temperature is at its maximum and I am convinced that...