Motor Oil thread. - Page 2 - Ford Mustang Forum
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Originally Posted by dsargent09 View Post
What oil do you use and why? What is the best oil for our motors. I am going to change my oil for the first time today, and was curious what you all are running.
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Royal Purple 5w20 & Motorcraft filter. My engine is quiet and Burns no oil.


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Running Pennzoil Platinum 10W-30 now and will do lab analysis.
next change will be with Pennzoil Ultra followed by AMSoil SS and RP HPS. want to do lab analysis for each one to determine which one is the best for my engine.

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Quote:
Originally Posted by Quan Cheese View Post
Pennzoil Platinum. Looked at reviews on bob is the oil guy and based on test its better then the so great mobil 1. I used it one time in my old car and it went from using no oil to 1qt every 2k. Ill never touch that over priced crap again. Its also the thinnest synthetic.. i like thicker

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X 2. Here in Canada, many of us make it a ritual to get it at half price at Canadian Tire several times a year. Great oil for cold weather.

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After using a few different types of Synthetic oils, I found to have my best results with Amsoil Dominator 5W-20 with an Amsoil Ea filter (I would do about an oil change a month with my car, I put on so many miles + road racing).

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Why would one use a motor oil with a higher viscosity than the manual specifies for street driving?

In my opinion, it is detrimental to do so because it takes more power to force a higher viscosity oil through the engine.

Since the oil pump is a positive displacement type, it takes more crankshaft power to run it with a higher viscosity oil.

The volume of oil flow through bearings and the filter decreases with a higher viscosity oil and the stock oil pump.

One could argue that a higher viscosity oil has better resistance to squeeze-out from bearings under high power loading. However, the Coyote Design Team made engine bearing design decisions predicated upon a 5W20 oil viscosity.

A higher viscosity oil is a consideration for an engine with a significant increase in torque and power resulting from supercharging or turbocharging.

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Quote:
Originally Posted by Quan Cheese View Post
You should be running motorcraft filters. Using universal oil filters is no good. The motrcraft has the thread end bypass which Ford recommends. On cold starts you are causing premature wear. Never mess with oil filters. You have Ford you run motrcraft. You have GM you run ac delco and so on.
You're clueless dude.



I use Amsoil signature series 5w-30 and an Amsoil filter.

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Quote:
Originally Posted by Bobby B View Post
Why would one use a motor oil with a higher viscosity than the manual specifies for street driving?

In my opinion, it is detrimental to do so because it takes more power to force a higher viscosity oil through the engine.

Since the oil pump is a positive displacement type, it takes more crankshaft power to run it with a higher viscosity oil.

The volume of oil flow through bearings and the filter decreases with a higher viscosity oil and the stock oil pump.

One could argue that a higher viscosity oil has better resistance to squeeze-out from bearings under high power loading. However, the Coyote Design Team made engine bearing design decisions predicated upon a 5W20 oil viscosity.

A higher viscosity oil is a consideration for an engine with a significant increase in torque and power resulting from supercharging or turbocharging.
Well here are my reasons:
1) I'm supercharged
2) Ford only went with 5W-20 in US/Can due to CAFE (I think it's called CAFE). Since from my research exact same engine in Australia is using 5W-30.
3) Under heat and hard driving conditions after some miles oil usually downgrade a little. So i'f i'm a 30 weight oil at 5K miles it's more like 20 oil.

Plus in my opinion the is not much difference between 20 and 30 oil so the engine won't feel much more stress but it will give just a little bit better protection on a dyno run or under hard driving conditions.

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GT track pack recommends 5w-50.
Regular GT recommends 5w-20.

Its the same engine. Ford even says so.

If you beat the hell out of your car street, strip, or otherwise, a higher viscosity oil is permissible.

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Quote:
Originally Posted by Bobby B View Post
Why would one use a motor oil with a higher viscosity than the manual specifies for street driving?

In my opinion, it is detrimental to do so because it takes more power to force a higher viscosity oil through the engine.

Since the oil pump is a positive displacement type, it takes more crankshaft power to run it with a higher viscosity oil.

The volume of oil flow through bearings and the filter decreases with a higher viscosity oil and the stock oil pump.

One could argue that a higher viscosity oil has better resistance to squeeze-out from bearings under high power loading. However, the Coyote Design Team made engine bearing design decisions predicated upon a 5W20 oil viscosity.

A higher viscosity oil is a consideration for an engine with a significant increase in torque and power resulting from supercharging or turbocharging.
Because Ford does that crap to advertise higer mpg. 5w20 is to thin for those cars. No one on here has ever had problems with 30 weight etc. At high rpms and highway 5w20 is to thin. Its like water drain it while its hot.

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Quote:
Originally Posted by 740weapon View Post
GT track pack recommends 5w-50.
Regular GT recommends 5w-20.

Its the same engine. Ford even says so.

If you beat the hell out of your car street, strip, or otherwise, a higher viscosity oil is permissible.
Yep, and the majority of those track pack cars will spend most of their time on the street, commuting to work, running errands, etc. all on 5W-50. So I don't see how 5W-30 is going to hurt anything even under normal driving conditions.
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Quote:
Originally Posted by Quan Cheese View Post
You should be running motorcraft filters. Using universal oil filters is no good. The motrcraft has the thread end bypass which Ford recommends. On cold starts you are causing premature wear. Never mess with oil filters. You have Ford you run motrcraft. You have GM you run ac delco and so on.

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Lmao. Umm each aftermarket filter is vehicle specific; not universal. There are oil filters out there which are much better than motorcraft. I don't know what kool aid you have been sipping on, but you are 100% wrong.

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Quote:
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Lmao. Umm each aftermarket filter is vehicle specific; not universal. There are oil filters out there which are much better than motorcraft. I don't know what kool aid you have been sipping on, but you are 100% wrong.
Motorcraft has the thread end bypass which Ford recommends. When I say universal I mean filters like purolator and fram etc. They all have different bypasses then Fords. Which can result in premature engine wear on cold starts because of improper flow. I put a purolator on my 04 one time because they were out of motorcrafts. Had a cold start tap from it. Switched back to motorcraft gone. Mororcraft is not the best filter in the world but they design them specifically for our cars.

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Royal Purple & RP filter or Amsoil & filter, can't go wrong with either one. Don't listen to the Motorcraft only crowd, you can do much better for your money.
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Quote:
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Royal Purple & RP filter or Amsoil & filter, can't go wrong with either one. Don't listen to the Motorcraft only crowd, you can do much better for your money.
and you can do much worse lol.....

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