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I showed this to my mechanic and he told me not be concerned and just check the oil again at the next oil change. I can help but being concern with the results. Has anybody ever seen this before in a test?
Yea, that's not good. First thing you should do is stop using Mobil 1 0W/40 in this car and switch to either Driven DT40 or Motul xcess 8100 (both 5W/40) or if you live where it's hot year round like south Florida, driven FR50 which is a 5W/50. You need more film strength and more Zinc and Phosphorous than what you have - you want over 1,000 ppm of both in the UOA.
You need to replace all your fuel injectors. At least one is bad and diluting the oil with fuel and its causing bearing wear. This is also one of the leading causes of cylinder bore scoring in these engines too.
Smoke test the intake systems and make sure you don't have a vacuum leak that the car is adjusting fuel trims richer as that can also dump extra fuel into the cylinders.
This is exactly the reason we spend the money for UOA - so we can catch issues like this before they destroy an engine from the inside out.
Last edited by Petza914; Feb 29, 2020 at 06:37 AM.
Flash point is low, viscosity is low, fuel dilution is high & wear metals are high. Test again and hope it's a fluke but based on this report it doesn't look great.
A number of oil test data comparisons shown on another forum show absolutely no benefit in using these "boutique" oils vs Mobil 1.
If you're talking about the thread on Rennlist, I completely disagree. The viscosiry numbers of M1 in that thread are lower than the others and in most cases the metal wear ppm is higher.
If you're talking about the thread on Rennlist, I completely disagree. The viscosiry numbers of M1 in that thread are lower than the others and in most cases the metal wear ppm is higher.
You mean this one? What matters is wear and Mobil1 compare well.
You mean this one? What matters is wear and Mobil1 compare well.
Yes, that's the one. The only consistently good results that don't have an out-lier are the Driven DT40 ones and the reason I use that particular oil. There are high wear metals in samples from all the others, and in the small sampling in that report, the Motul is actually the worst of the 997.1 samples. Unfortunately those two samplings were also higher mileage changes (over 6,000 miles). It would be helpful for some owners to post their Motul reports at an interval of between 4,000-5,000 miles which is when oil should be changed. The problem with the Mobil oil is the viscosity numbers are some of the lowest and thin oil won't protect as well longer term as oil where the viscosity holds up better. In looking at it again though, I actually agree with you that most of the normal mileage Mobil samples in this chart are better than some of the others and that in a 997.2 the Motul and the Mobil seem to hold up OK. In a 997.1 less so and the best choice is the Driven DT40. Mobil in the 997.1 has higher wear metals across the board than the DT40 samples.
Yes, that's the one. The only consistently good results that don't have an out-lier are the Driven DT40 ones and the reason I use that particular oil. There are high wear metals in samples from all the others, and in the small sampling in that report, the Motul is actually the worst of the 997.1 samples. Unfortunately those two samplings were also higher mileage changes (over 6,000 miles). It would be helpful for some owners to post their Motul reports at an interval of between 4,000-5,000 miles which is when oil should be changed. The problem with the Mobil oil is the viscosity numbers are some of the lowest and thin oil won't protect as well longer term as oil where the viscosity holds up better. In looking at it again though, I actually agree with you that most of the normal mileage Mobil samples in this chart are better than some of the others and that in a 997.2 the Motul and the Mobil seem to hold up OK. In a 997.1 less so and the best choice is the Driven DT40. Mobil in the 997.1 has higher wear metals across the board than the DT40 samples.
Theoretically, it is better for the viscosity to not drop as much but the reason for the concern is increased wear. The wear numbers for those samples ( aluminum, silicon, copper, etc.) don't support that theory. In fact there is no statistically relevant information in that data to indicate the "special" lubes are any better than Mobil 1 in protecting your engine. It reminds me of the "upgraded" ceramic IMS bearing which simply an aftermarket alternative to the original. The supplier of the"upgraded" bearing puts a limited lifespan on their product at 30K miles. There are many theories out there but it is better to stick with facts.
