Oil pressure too high?

[2015 Silver GT]

5 w 20 is best just get a real good synthetic like amsoil or royal purple hps . these engines were built for 5w20 and have oil squirters to make sure the 8 quarts properly lube the motor especially at idle when generally the psi is lower. The oil has to be thin enough to go through The squirters properly.

Well these motors don't have oil squirters so there goes that theory.:headbonk:

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[Ruby red GT]

The 10 W30 isn't going to hurt anything. Just allow for a good warm up on cold days.

 

[dubster99]

check out my previous thread where literally every single person suggested 10w-30 for my car. boss mani 8k redline hard driving. I might switch back I guess. Its just frustrating getting 1000 different answers from people. shouldnt have to be so much trial and error...

anywayz is this damaging at all or should I change it back soon?

There's no 100% right or wrong answer for anything. How would we learn anything if there wasn't trial and error?

 

[turbosc297]

Every engine oil is too thick until warmed up to operating temps.
Higher pressure does not equal higher FLOW. Lower pressure with higher flow is what you want.

 

[jasonstang]

The draw back is too much pressure can cause the oil filter bypass valve to open and round unfiltered oil through the filter.

 

[ero 5.0]

So you thiink I should go back to like maybe a 5w-30 and meet in the middle?

 

[dgc333]

The 10 W30 isn't going to hurt anything. Just allow for a good warm up on cold days.

That's not a true statement. 80-90% of all engine wear comes at startup and during warm up. You want as low a viscosity as possible at start up and you get that with a lower low temp viscosity rating not higher.

If you are looking to deviate from the specified 5w-20 with something that provides better high temperature protection 0w-30 would be a good choice.

 

[Ruby red GT]

That's not a true statement. 80-90% of all engine wear comes at startup and during warm up. You want as low a viscosity as possible at start up and you get that with a lower low temp viscosity rating not higher.

If you are looking to deviate from the specified 5w-20 with something that provides better high temperature protection 0w-30 would be a good choice.

While I do not disagree with what you are saying about viscosity and engine wear at start up 10w-30 will not damage these engines. I ran 10w-30 synthetic for years in my 2011 supercharged GT and never had any issues.

 

[mustang_guy]

You could run 5w30 or 0w40 or 0w30 for winter and 10w30 for summer. It wont hurt to switch for a car thats driven year round. I personally use 5w30-40 when i lived in the Midwest during winter and 10w30-40 during summers on performance cars. Raised pressure isnt horrible. The boss uses 5w50. That would be higher then what youre at now. They arent having failures.

 

[347CobraII]

Well these motors don't have oil squirters so there goes that theory.:headbonk:

Yes they do

 

[347CobraII]

The draw back is too much pressure can cause the oil filter bypass valve to open and round unfiltered oil through the filter.

You bypass more oil than you think even with correct oil rating

 

[dgc333]

While I do not disagree with what you are saying about viscosity and engine wear at start up 10w-30 will not damage these engines. I ran 10w-30 synthetic for years in my 2011 supercharged GT and never had any issues.

I will disagree that 10w-30 does not damage the engine. You won't notice it in the short term but over many years of use you are shorting the engines life.

What I don't understand the motivation for using 10w-30 when it provides ZERO benefit over 0w-30 or 5w-30 and potentially causes more wear.

 

[Silver50Pony]

Being that the motor has oil squirters I wouldn't run anything too thick, when at idle and lower pressures it's harder to lubricate the engine

 

[Niz55]

mine is at 85psi in the morning. I park my car in the a heated 75F garage and every morning is at 85PSI until warms up. I am using OEM filter and 5w-20 semi synthetic from ford.

 

[BmacIL]

10w-30 will only increase cold start wear and won't provide any additional protection at higher temps over 5w-30. Additionally, FLOW is what is important, not pressure. If you have very tight bearing clearances, as the 2015 coyote does, thicker oil will reduce flow and increase pressure, giving a false sense of confidence.

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