Spun rod bearing..

[Roh92cp]

Most people pick oil brands by marketing strengths and name recognition, and viscosity by popular vote. Real objective data and testing done on oils is hard to find, and when done is still doubted, becuase people want to believe in their name brand and decisions. Oils chief objective is to prevent metal to metal contact via a film or oil wedge. This has less to do with viscosity and more to do oils base stock and most important is the additive packages.

Read this independent testing data on our currrent oil market and decide for yourself. Test is conducted on a controlled devise that measure the film stenght of an oil and its ability rated in PSI as to when it breaks down causing metal to metal contact. The higher the PSI rating the better protection the oil provided.
https://540ratblog.wordpress.com/2013/06/20/motor-oil-wear-test-ranking/

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[Excelerater]

Thicker oil will give you better protection especially on a boosted motor that sees more heat, 5w-20 looks like water when it's hot

no doubt...... high RPM and Boost def need more protection
but at least full synth will stay 5/20 in the heat..Dino oil becomes
even thinner

 

[turbo50]

Even with a synthetic, viscosity changes with temperature. Selecting the correct viscosity for an application requires knowing the operating temperature of the oil. But it's a reason why the gt500 and gt350 run a 50w

 

[terryj]

What are the clearances on the 5.0l?

Engine specs

 

[F1scamp]

With that tight of clearances, no way would i run 20w/50.

 

[mustang_guy]

I dont know why more arent running 5w30-5w40 or 0w40. Its much better suited for most here. Oh well.

 

[mustang_guy]

Even with a synthetic, viscosity changes with temperature. Selecting the correct viscosity for an application requires knowing the operating temperature of the oil. But it's a reason why the gt500 and gt350 run a 50w

I most definitely didnt use 5w50 in my 14 trinity . I used 5w40.

 

[turbo50]

With that tight of clearances, no way would i run 20w/50.

And you think a gt350 or gt500 is going to have looser clearance from the factor yet they still run a 50w

 

[turbo50]

I most definitely didnt use 5w50 in my 14 trinity . I used 5w40.

Recommend oil from ford if motorcraft 5w-50

 

[mustang_guy]

Recommend oil from ford if motorcraft 5w-50

I dont care what ford recommends. I did their wrenching for almost a decade as a master tech. Firstly their 5w50 grade is garbage and second 5w50 is not a must. Same as many boss 302 owners using 5w30 and 5w40 flawlessly. 5w50 causes very high oil pressure for a street driven car for daily driving. That is better suited for the track. If someone is running 50 on the street its because they just dont know any better. 50 is better suited for someone that beats the car like it owes them money from the time it leaves the house til you bring it back home. Ie tons of street racing, tons of freeway pulls or tracks the car and has enough skills (id venture most here dont) to push the car hard enough to require it. 5w50 is overkill for pretty much 95%ish of the people here. Its not a cruise around town, go to a few meets and maybe swing by the gas station and pick up some beer oil weight.

 

[mustang_guy]

Im a bmw master tech currently and bmw suggested a 10w60 grade for older m series. It was way too thick and caused tons of problems unrelated to bmws being shitboxes in general. It was a track weight. Its what m cars were designed for typically. The smart owners got off that crap and switched to a 0w40 or 5w40 typically.

You notice bmw doesnt suggest those retard weights anymore? Its 5w30 made by shell, not castrol anymore. Just because a manufacturer says to use it, sadly doesnt always mean its the best for your application.

 

[turbo50]

All I'm saying is 5w-20 is very thin and a boosted motor needs more protection 40w or 50w will do the job

 

[Excelerater]

Recommend oil from ford if motorcraft 5w-50

5/50w vs 20/50..Anyone know the difference ?

 

[mustang_guy]

All I'm saying is 5w-20 is very thin and a boosted motor needs more protection 40w or 50w will do the job

I whole heartedly agree 5w20 is too thin. Its too thin even for a stock car thats beat hard. Itll be fine for someone that mostly leisurely drives the car. :cheers:

 

[mustang_guy]

5/50w vs 20/50..Anyone know the difference ?

Some synthetic 20W-50 oils are actually thinner than 20W. What most dont know is they those like that are labeled like that for marketing reasons. If it passes the 15W test or 10W test, it has already passed the 20W test which calls for an oil no thicker than the spec. The difference between 5w50 and 20w50 is one most likely will shear worse and flow better, the other will shear less and flow worse. In practical ambient temperatures the real difference would most likely not be that great.

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