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If the engineering is there to support it, otherwise you are assuming something. Does thicker blood work in your body? Thicker oil means less oil flow. The bearing itself is a pump that has extreme pressures to the MOFT. Again… wear is due to temperature increase. Flow decreases temperature...

So… That is hardware engineering needed to the size of the bearing used. I have faith in the engineering. 20 weight oil has been around for 20 years. The bearing surface and flow has been proven. But the extreme pressures at MOFT creates much higher temperatures and at that point viscosity...

If there is a problem with the timing chain, rings allowing oil consumption, bearings that wear out it is an issue with the engine hardware engineering. Not fluids. Every point of stress in an engine has a hotter oil producer that reduces the viscosity, so viscosity is variable. Oil flow is the...

Thanks for the correction.

Read starting at page 28 and further pages describing why Mobil 1 is reformulating. Page 29 states Visom is a precursor to GTL. (not GTL) Presently Mobil 1 is using GTL. Are they being supplied GTL by SOPUS, or do they manufacture their own? This write up was before 2010… IMO I believe this is...

I saw this post a while back and maybe got the wrong impression. Page 28-29. On or before year 2010 API SM Visom is a forerunner to GTL

Mobil 1 Visom (GTL) has been around for a long time. Waiting to take over the PAO role Mobil claimed Visom a long time ago comparable (equal) but delayed the formula change to Mobil 1. Now that change happened. How does Shell GTL compare to Mobil GTL?

Before Mobil 1 synthetic oil there was Amsoil synthetic. Both had issues with oil seal shrinkage which was controlled in reformulation. Just some info… Back then this was state of the art oil. Mobil 1 reformulation today from a few years ago. Always moving forward.

Oil and engines are in a completely different place now. The playing field is closer to level and the engines are designed to last with a long time of engineering behind it... What is a “car people”?

Maybe… But maybe Dexos approved PP actually has less additive package by design to pass. Just a guess.

Just curious if you engine does not require Dexos 1 gen. 3 what advantage would PP have over PUP? Not a sharp guy but PUP has boron and PP does not.

The oil is too thick in the morning start. The rest of the time who cares.

Or the guy “in the know” uses a full flow air filter. (like K&N) Suggest removing MAF and see if intake is spotless. (MAF cleaner?)

https://bobistheoilguy.com/forums/threads/question-about-filter-bypass.200435/#post-3067617 Jim Allen’s post #7 seems more accurate to me regarding the filter bypass.

A bypass oil filter would work without reduction of flow. Dirt is dislodged when the full flow oil filter bypass opens. Cold oil (thicker) can cause the bypass to open.

Xw-20 grade? Wear? And how wear happens? According to the article wear will always happen, in the bearing. Oil starvation section, improper oil film. The point I need to make is per the article is I can not find any reference to bearing wear due to using Xw-20. (the recommended oil weight) It is...

for instance…. https://www.mahle-aftermarket.com/media/local-media-north-america/pdfs-&-thumbnails/catalogs-and-literature/engine-bearings/ceb-2-1114-engine-bearing-failures-brochure.pdf Notice the bearing failure rate is mainly caused by particles in the oil. Normal bearing wear is seen on 2/3...

Personally think you can not make a one viscosity statement fits all vehicles statement. There is more to wear than main bearing MOFT at operating temperature.

Do you really need to know? 5w-20 came out in 2002. Whenever the car was made the viscosity rules… Ford would love you to change, the car is out of warranty. So… Is the engine today made for the viscosity in the OM.

Personally not worried about 20 weight oil. As long as that is what the manufacturer calls for. Forced intake would be a different ball game. Always a better 20 weight oil but for price and the rebate PUP 0w-20 is hard to beat IMO.