Nope. Why would I want to run an oil formula that can't stay within it's grade specifications...? 5W-50 is an extreme spread, it is the most extreme temperature range requirement and hence why they have to use a lot of polymer viscosity improvers to meet that specification.Unfortunately due to...

I think you should probably follow your own advice on this one. The scatter plot indicates the majority of 30 and 40 weight oils tested lost around 10% of their HTHS viscosity for ever 20% loss of kinematic viscosity. Heavy clustering is at the top of the trend line (the red line), not the...

The original question was, should the OP run higher viscosity oil like 5W-50 when the OE spec was 5W-20. There were a bunch of different answers from different members which is confusing. Some say just use 5W-20 and go with a high end mPAO based oil, other say user a higher viscosity oil like...

There is no track warranty for any of the non-track focused car. Why your bothering to even mention you Boss is beyond me because it has nothing to do with the original poster's NON TRACK PACK GT. You break a non-track variant on the track you pay for the repairs. This entire thread was started...

That's why I suggested that Mr. Ferrari's Enzo is likely no longer running well, or will not be in the near future. I'm not sure why everyone assumes OE setups are infallible or cannot be deviated from.I work in the gas an oil industry designing electrical safety equipment. OE setups are a...

Apparently you didn't read through Infiniums testing on the loss of HTHS viscosity. I didn't include it because it was here say, I included it because of actual test data on the issues with the use of common viscosity improvers used in motor oils. Yet here we are still debating it...o_O

If your dead set on tracking the car with 5W-20, I'd suggest nothing less than has been suggested before, Driven FR20 mPAO, Penzoil Ultra Platinum 5W-20 or RedLine 5W-20. mPAO, Ester and GTL base stocks are all highly shear resistant. mPAO and GTL (Pure Plus) are both are used in NASCAR race...

To all, remember that Ford is a company with many cogs and not all of their decisions are based on what is best or most optimal from a design standpoint, just like any other company, profitability is at the top of the list, or they would cease to exist.Usually it's a balance of the Engineers...

Grant 302, take a look at the data from Infinitum (attached, highlighted in yellow key points), they are a major oil additive supplier. Their research clearly shows HTHS viscosity is lost as the oil shears down due to polymer break down. It's not just KV at 100C that is lost. Viscosity is...

ECU can only make decisions based on what sensor information is available. There are no sensors for the lash adjusters. Can you elaborate for me how the ECU will detect abnormal lash? I'm not see how it can infer that information either.

Looks like RedLine and PUP held up very well. Ester and GTL's for the win. MC held up pretty well too. M1 not too bad, but their standard synthetics shear down rather quickly. SVT had a UOA thread of S197's and M1 was one of the worst offenders of all the oils at shearing down unless you went to...

My original information was aimed at non-track pack cars. 2011-2014 S197's without the track pack and 2015-2017 GT's. None of which call for anything but 5W-20 in the owners manual and their only reference to track use is "add cooling". Even with added cooling, 5W-20 is marginal because of how...

To be clear when I'm talking about efficiency, I mean drag losses vs film strength. Power to the wheels reliably. Many people compete, weather against the clock or against others. Power matters as much as handling, which matters as much as driver skills. It's all a piece of the puzzle. I want to...

NASCAR's are a bad example. The rules are strict and are very limited on what can and cannot be done. Those guys nitpick literally ever hp they can for an advantage. Those engines also only last 600 miles and use rod bearings with a tolerance down to 0.0001", extremely high uniformity that...

So your 5W-50 dropped to 13.37 cSt @ 100C. That oil is supposed to be 17.5 cSt @100C. That oil has lost 30% of it's viscosity under your uses as is no longer 5W-50. It's 5W-40. Minimum viscosity for 5W-50 is 16.3 cSt @100C. That proves my point. You'll get better wear from a stay in grade 5W-40...