Put regular oil instead of synthetic

[Norm Peterson]

3 months/3000 miles was back when engines took 5 quarts with the filter. A 6-quart system should give you 20% more before contamination/reduction in base number reaches the same point. Even if oils and engines hadn't improved a bit in the meantime.

The 4.6L is OK'd for 7500 in "normal driving", which probably doesn't describe much of the driving of many here. Primarily driving under "Special operating conditions" (Ford's term) calls for a 5000 mile/6 month interval.


Norm

 

[Speed+Clinic]

3 months/3000 miles was back when engines took 5 quarts with the filter. A 6-quart system should give you 20% more before contamination/reduction in base number reaches the same point. Even if oils and engines hadn't improved a bit in the meantime.

The 4.6L is OK'd for 7500 in "normal driving", which probably doesn't describe much of the driving of many here. Primarily driving under "Special operating conditions" (Ford's term) calls for a 5000 mile/6 month interval.


Norm

Where does that come from lol??? Not all engines are made the same. So by your logic since a porsche 993 Turbo uses 15 quarts then you should have it for 3x longer? lol

 

[DKS]

Oh fuck it

 

[3vs197]

The 4.6L is OK'd for 7500 in "normal driving", which probably doesn't describe much of the driving of many here. Primarily driving under "Special operating conditions" (Ford's term) calls for a 5000 mile/6 month interval.

that particular portion is brought to you by the people that built your vehicle.

 

[Norm Peterson]

Where does that come from lol??? Not all engines are made the same. So by your logic since a porsche 993 Turbo uses 15 quarts then you should have it for 3x longer? lol

Probably not. Wouldn't you expect there to be more differences in the demands placed on the oil between a relatively low-revving pushrod V8 front-mounted motor and a higher-rpm flat-six OHC rear-mount motor than between one pushrod V8 front motor and another?

It's not a direct comparison when one of the motors is turbo'ed anyway. All by itself even if you don't get into boost very often, you are into a "severe service" condition as far as the oil is concerned.


Norm

 

[Speed+Clinic]

that particular portion is brought to you by the people that built your vehicle.

Ford recomends 5w-20 but the people that designed the engine recommend nothing less than 10w-30. You have to weed out between marketing and cafe standards/tax incentives with what really is good/works for your engine

Probably not. Wouldn't you expect there to be more differences in the demands placed on the oil between a relatively low-revving pushrod V8 front-mounted motor and a higher-rpm flat-six OHC rear-mount motor than between one pushrod V8 front motor and another?

It's not a direct comparison when one of the motors is turbo'ed anyway. All by itself even if you don't get into boost very often, you are into a "severe service" condition as far as the oil is concerned.


Norm

the 993 redline is very similar to our cars if i am not mistaken around 6.5k to 7k even though it is a flat six which is balanced naturally where as ours is not and the stock crank doesn't have counterweights.

100% agreed on the second point.

 

[JEWC_Motorsports]

In my 2008 Silverado owners manual, under normal driving conditions it states to change the oil when the light comes on or once a year. Sound advice, i dont think so.

 

[05stroker]

I refuse to argue over oil ! LOL!

OP you will be fine . Change the oil as you have always done it

 

[BruceH]

the 993 redline is very similar to our cars if i am not mistaken around 6.5k to 7k even though it is a flat six which is balanced naturally where as ours is not and the stock crank doesn't have counterweights.

100% agreed on the second point.

The 4.6 crank has counterweights.

Ford recomends 5w-20 but the people that designed the engine recommend nothing less than 10w-30. You have to weed out between marketing and cafe standards/tax incentives with what really is good/works for your engine

I call bullshit on that. Have you ever looked at the vct passages? They are so small that a hair would interfere with oil flow.

How many motor failures have been due to using 5-20? Mod motors are usually killed by detonation, rods, or oil pump failure and sometimes spun bearings. Have you ever thought the stock oil pump gears shred due to increased load when owners are "protecting" the motor with 10-40?

What would using a 10w oil do to the oil wedge? I have side rod clearences of .010, .011, .011, and .010. My pistons are clearenced at .002" due to 4032 alloy. Ford specs allow for side rod clearence to be as small as .0059.

I've run 5-20, 0-30 and 5-30 since building the motor. Currently running 0-30 but going back to 5-20.

Are you using 10-30 in a 4.6 3v? If not what do you use in your 3v?

 

[Speed+Clinic]

The 4.6 crank has counterweights.




I call bullshit on that. Have you ever looked at the vct passages? They are so small that a hair would interfere with oil flow.

How many motor failures have been due to using 5-20? Mod motors are usually killed by detonation, rods, or oil pump failure and sometimes spun bearings. Have you ever thought the stock oil pump gears shred due to increased load when owners are "protecting" the motor with 10-40?

What would using a 10w oil do to the oil wedge? I have side rod clearences of .010, .011, .011, and .010. My pistons are clearenced at .002" due to 4032 alloy. Ford specs allow for side rod clearence to be as small as .0059.

I've run 5-20, 0-30 and 5-30 since building the motor. Currently running 0-30 but going back to 5-20.

Are you using 10-30 in a 4.6 3v? If not what do you use in your 3v?

The 4.6 has counterweights so it is balanced are you sure of that??? The 6 bolt one, not talking about a cobra 8 bolt...

I use 10w30, scott witthead the systems engineer for the 4.6 explicitely says the 5-20 was recomended for mpg instead of protection. Obviously we are not talking about catastrophic lubrication failure but increased wear/tear.

here is a good read...

http://www.synthetic-motor-oil-air-filters.com/amsoil/5w-20-5w-30-0w-30-recommendation.htm

either way dont believe anyones word. Do it yourself...

http://www.blackstone-labs.com/free-test-kits.php

 

[BruceH]

The 4.6 has counterweights so it is balanced are you sure of that??? The 6 bolt one, not talking about a cobra 8 bolt...

I use 10w30, scott witthead the systems engineer for the 4.6 explicitely says the 5-20 was recomended for mpg instead of protection. Obviously we are not talking about catastrophic lubrication failure but increased wear/tear.

here is a good read...

http://www.synthetic-motor-oil-air-filters.com/amsoil/5w-20-5w-30-0w-30-recommendation.htm

4.6 cranks all have counterweights. The 8 bolt has two more than the 6 bolt.

I've never noticed a difference in mpg due to the weight of oil I used. Did this guy work on the 3v motors?

Are you affiliated with amsoil, the parent company, or a subsiderary?

 

[Brain_Mach1]

that particular portion is brought to you by the people that built your vehicle.

And they actually send oil samples to be tested in a lab. They truly DO know how long oil lasts.

Anyone can send a sample of your oil to be tested. Or people can swap stories on the Internet about how long oil lasts in their vehicle with no data.

 

[3vs197]

^ yep.

the 5-20 oil is fine for 90% of people in the world who drive their cars nice. We have 20+ customers who have foucs', escapes, f series, taurus', etc... with 200+k using 5-20 their whole life.

i personally run mobil-1 0-40 european performance oil because it has a higher zddp count than most oils.

 

[BSell]

Thank you very much. This is because on a lot of short trips the engine doesn't completely go up to temperature and the engines run a bit richer which contaminates the oil with the fuel. Not to mention that all the metals haven't completely expanded which makes the piston not seal completely thus there maybe leaks which the oil gets polluted with fuel. Why do you think you test compression with the engine on operating temperature??

Also remember if you are turbo you have to add that to the consideration since the turbo adds an additional stress on the oil system since most turbos are not only lubricated by the oil on the engine but they also cool down the turbo which tends to get very very hot and cooks the oil.

Read the oil bible it is very good reading stuff, but you see the diference between synthetics and regular oil. Have you ever opened an engine that runs on regular oil vs a synthetic? It is cleaner.

What do you get when you 'burn' gasoline perfectly? Water and carbon dioxide/monoxide. Granted internal combustion engines don't burn gasoline 'perfectly' but what happens to all that water? Most goes out the tailpipes as water vapor. Some is blown into the crankcase to mix with the oil. There is no mystery why the normal operating temperature for engine oil is above the boiling point of water, to force the water out of the oil which prevents acid formation and water-induced sludge formation in the oil.

Turbo applications must be designed to keep the operating temperatures of the oil in the safe zone. That is why turbo systems went to water cooled center bearings quite some time ago.

I'll give you high-milage synth motors look like crap inside, based on coloring of the metals only. The motors I've used nothing but Pennzoil dyno oil in have stayed factory-fresh-looking past the 50K mile mark with changes every 3K miles/3 months. Does that mean there is less wear also? I didn't do a before and after measurement analysis but I sure felt smug, looking at my very clean cylinder heads! Did I waste a bunch of possibly very good to go oil? Maybe. Slowing the production of used motor oil into the waste stream is just one of the forces on manufacturers' recommended oils/change intervals.

To the OP, change your oil when you get the chance or at the appropriate interval specified in the owner's manual. It'll be alright either way since there is oil to be pumped!

 

[Speed+Clinic]

And they actually send oil samples to be tested in a lab. They truly DO know how long oil lasts.

Anyone can send a sample of your oil to be tested. Or people can swap stories on the Internet about how long oil lasts in their vehicle with no data.

They prefer CAFE standards than other stuff... I have sent my oil for analysis you are more than welcomed to try for yourself.

4.6 cranks all have counterweights. The 8 bolt has two more than the 6 bolt.

I've never noticed a difference in mpg due to the weight of oil I used. Did this guy work on the 3v motors?

Are you affiliated with amsoil, the parent company, or a subsiderary?

No I do not work with amsoil or anything owned by it.

Here is a good read:
http://www.corner-carvers.com/forums/showthread.php?t=36607

 

[Riptide]

the people that designed the engine recommend nothing less than 10w-30

No. ONE OF the PEOPLE that designed the engine have made this statement.

FWIW, I believe it was Roush or Saleen that were recommending 5W30 for their supercharged cars for a while. I can't find anything about it on their website now.

Since very few if any of these cars have blown an engine due to using 5W20 that anyone has been able to prove it's pretty apparent this whole issue has been blown WAY out of proportion.

I think Androdz is back btw.

 

[RRRoamer]

I think Androdz is back btw.

Shit man! Those are fighting words if ANY words are fighting words! Here I was, minding my own business and catching up on this thread when you had to remind me about THAT idiot!!!

 

[JEWC_Motorsports]

All i know is the more you change your oil, the more money i make.