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Old 06-13-2012, 09:36 PM   #1
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Oil ?

89 mustang gt 5.0 engine has work done to it. What oil do you recommend? About to do the first oil change in it since I have had it
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Old 06-13-2012, 10:32 PM   #2
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If your willing to fork out the money royal purple is really good. Like I said though its kind of expensive. That or mobil 1 synthetic isn't bad. What mods do you have?
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Old 06-13-2012, 11:39 PM   #3
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Hooker headers bbk cold air intake it's cammed but I dont know what one. 4.10 gears dual Flowmaster x.
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Old 06-14-2012, 05:33 PM   #4
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I always play it safe and stick with motorcraft.. And I've never felt safe putting synthetics in a older motor..
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Old 06-14-2012, 09:46 PM   #5
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Re: Oil ?

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I always play it safe and stick with motorcraft.. And I've never felt safe putting synthetics in a older motor..
They won't hurt a thing and from what I have recently read, the issue of synthetic oils causing leaks is no longer a problem. Note, that I have not verified this myself though.
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Old 06-14-2012, 11:57 PM   #6
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Quote:
Originally Posted by Trojan Horse

They won't hurt a thing and from what I have recently read, the issue of synthetic oils causing leaks is no longer a problem. Note, that I have not verified this myself though.
What do you use in your cars?
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Old 06-15-2012, 01:27 AM   #7
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1989 mustang royal purple 10w30 is doing good in my engine
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Old 06-15-2012, 01:53 AM   #8
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I had no idea what the guy before
Me had in the car but when I got home I put motorcraft in it because it was low. But I just wanted to get ideas from people before I choose what I'm gonna change it to
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Old 06-15-2012, 10:12 AM   #9
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Valvoline is what I run 10-30
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Old 06-15-2012, 11:27 AM   #10
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Quote:
Originally Posted by sixpac

What do you use in your cars?
Royal purple I what I run...when I have some Pocket change lol
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Old 06-15-2012, 11:35 AM   #11
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Re: Oil ?

I use mobile 1 10w40
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Old 06-15-2012, 11:38 AM   #12
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Re: Oil ?

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What do you use in your cars?
Motorcraft Semi-Synthetic & Mobil 1.
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Old 06-15-2012, 12:36 PM   #13
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Quote:
Originally Posted by Trojan Horse

Motorcraft Semi-Synthetic & Mobil 1.
Do you use Mobil 1 in your newer cars or? And what weight do you run in your 5.0
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Old 06-15-2012, 12:45 PM   #14
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Re: Oil ?

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Originally Posted by sixpac View Post
Do you use Mobil 1 in your newer cars or? And what weight do you run in your 5.0
I use the Motorcraft Semi-Synthetic 5W/20 in my newest car and the Mobil 1, 5W/30 in my 5.0.
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Old 06-15-2012, 12:52 PM   #15
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In my 90 mustang I use motorcraft 5w30 I believe motorcraft is synthetic blend as opposed to full synthetic. I was running motorcraft full synthetic but I have a oil pan gasket leak an have to add a quart or so between oil changes. When I redo this engine or build another( not sure yet) im gonna go full synthetic again
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Old 06-15-2012, 12:58 PM   #16
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Quote:
Originally Posted by Trojan Horse

I use the Motorcraft Semi-Synthetic 5W/20 in my newest car and the Mobil 1, 5W/30 in my 5.0.
What you think about using mobil 1 in my 5.0 with 130k

---------- Post added at 12:58 PM ---------- Previous post was at 12:52 PM ----------

Don't think I'm going to.. I was deciding on wether to use 5w or 10w -30 and I was thinking I might switch to synthetic in my 2001 v6 with 80k miles. But I'm a little sceptic. And does motorcraft make a full synthetic?
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Old 06-15-2012, 01:18 PM   #17
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Re: Oil ?

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Originally Posted by sixpac View Post
What you think about using mobil 1 in my 5.0 with 130k

---------- Post added at 12:58 PM ---------- Previous post was at 12:52 PM ----------

Don't think I'm going to.. I was deciding on wether to use 5w or 10w -30 and I was thinking I might switch to synthetic in my 2001 v6 with 80k miles. But I'm a little sceptic. And does motorcraft make a full synthetic?
I think it would be ok and either 5w or 10w/30 would work.
If you live farther North where it gets colder, I would run the 5w, farther South where it stays warmer then the 10w would be my choice.


Yes, Motorcraft makes a full synthetic. - Motorcraft Oils
Synthetic oils have been proven to reduce friction and increase HP and mileage.
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Old 06-15-2012, 02:11 PM   #18
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Quote:
Originally Posted by Trojan Horse

I think it would be ok and either 5w or 10w/30 would work.
If you live farther North where it gets colder, I would run the 5w, farther South where it stays warmer then the 10w would be my choice.

Yes, Motorcraft makes a full synthetic. - Motorcraft Oils
Synthetic oils have been proven to reduce friction and increase HP and mileage.
Well I'm in Nebraska hot then hell summers with cold as ice winters. Ill probable use 5w-30 motorcraft full synthetic (if I can find it) on my v6 and synthetic blend on my 5.0.

---------- Post added at 02:11 PM ---------- Previous post was at 02:07 PM ----------

Quote:
Originally Posted by Trojan Horse

I think it would be ok and either 5w or 10w/30 would work.
If you live farther North where it gets colder, I would run the 5w, farther South where it stays warmer then the 10w would be my choice.

Yes, Motorcraft makes a full synthetic. - Motorcraft Oils
Synthetic oils have been proven to reduce friction and increase HP and mileage.
Now for my 5.0 I'm sticking with 5w30 but should I switch to 5w20 for my v6?
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Old 06-15-2012, 02:15 PM   #19
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Re: Oil ?

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Now for my 5.0 I'm sticking with 5w30 but should I switch to 5w20 for my v6?
Not unless it calls for it in your owners manual or on an engine/engine bay sticker.
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Old 06-15-2012, 02:21 PM   #20
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Quote:
Originally Posted by Trojan Horse

Not unless it calls for it in your owners manual or on an engine/engine bay sticker.
Well every time you go someware all the new books say use 5w20 and that stupid thing at Walmart but my owners Manuel says 5w30..
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Old 06-15-2012, 02:28 PM   #21
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Re: Oil ?

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Well every time you go someware all the new books say use 5w20 and that stupid thing at Walmart but my owners Manuel says 5w30..
Stick with what the owner's manual says.
Going as thin as possible with your engine oil will reduce the rotating force required somewhat, but the thinner oil will not provide the film strength needed for your engine unless it has been designed to use the thinner oils. Ford knows what is best for your engine. After all, they designed and built it.
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Old 06-15-2012, 02:32 PM   #22
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Quote:
Originally Posted by Trojan Horse

Stick with what the owner's manual says.
Going as thin as possible with your engine oil will reduce the rotating force required somewhat, but the thinner oil will not provide the film strength needed for your engine unless it has been designed to use the thinner oils. Ford knows what is best for your engine. After all, they designed and built it.
Well that is why I have always sticked with motorcraft in all my fords.. I figured them guys who designed it are getting payed a lot more then I am or probably ever will so the should know what there talking about. So ill probably go with 5w-30 for both cars but full synthetic for my v6.
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Old 06-15-2012, 02:58 PM   #23
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Does it mater if you have mods done to the engine? Should I use 10w30 or 5 or synthetic
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Old 06-15-2012, 08:50 PM   #24
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A blend is and if the guy who built the motor did it right wide ope throttle at first he did I a favor gets all the shaving and burs out the first run ,best way to to do it . U idle it u just can scorch it . Best way no matter what any one says
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Old 06-15-2012, 08:59 PM   #25
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Quote:
Originally Posted by sixpac
I always play it safe and stick with motorcraft.. And I've never felt safe putting synthetics in a older motor..
I put Penzoil synthetic in my 87 GT a few years back and she bled all over the place. I had to dump it and put regular 10W40 back in but it took 3 oil changes before it stopped the bleeding. Horrible, cause she wasn't even leaking at all before I used it.
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Old 06-15-2012, 11:31 PM   #26
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I think I'll just stick to a good rand of 10w30
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Old 06-16-2012, 04:11 AM   #27
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Re: Oil ?

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I put Penzoil synthetic in my 87 GT a few years back and she bled all over the place. I had to dump it and put regular 10W40 back in but it took 3 oil changes before it stopped the bleeding. Horrible, cause she wasn't even leaking at all before I used it.
If they do that, then you really need to replace the seals. The only thing sealing it up is the dirt and debris left by conventional oils and you really don't want that stuff floating around in your engine oiling system.


Supposedly from what I read, at least some synthetic manufacturers have reformulated to keep that from happening. Of course that means that all of the gunk the synthetics used to clean out gets left in your engine now.


In most cases there are only 2 seals affected. The front timing chain cover seal and the rear main seal. If they and any other gaskets do start leaking, then you had a problem there to begin with and the seals or gaskets should be replaced anyways.
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Old 06-16-2012, 04:58 AM   #28
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Re: Oil ?

I use 5w30 Castrol Edge in my Pony 09 and RP in my 98 Villager van.
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Old 06-16-2012, 06:51 AM   #29
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I run ams oil in everything i own and swear by it! Run it in both my bikes my dad runs it in his 71 chevelle, his harley, **** even the lawn mowers and power washer lol it works amazing!
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Old 06-16-2012, 07:24 AM   #30
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Re: Oil ?

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I run ams oil in everything i own and swear by it! Run it in both my bikes my dad runs it in his 71 chevelle, his harley, **** even the lawn mowers and power washer lol it works amazing!
I have seen the Amsoil ads, but its lack of easy availability in my area has kept me from having much interest in trying it. The main reason I use the Mobil 1, is that I can stop by the local auto parts store and pick it up. For me the real test is whenever I tear down an engine and get a good look at the internals after running any brand of oil. You can really tell which brands are better by the condition, cleanliness and wear that way.


Another lesser known brand in my area is Schaeffer's Specialized Lubricants.
My cousin who has had numerous high HP vehicles (1000 to 1400+ HP) swears by their products and uses them exclusively.
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Old 06-16-2012, 07:37 AM   #31
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Quote:
Originally Posted by Trojan Horse

If they do that, then you really need to replace the seals. The only thing sealing it up is the dirt and debris left by conventional oils and you really don't want that stuff floating around in your engine oiling system.

Supposedly from what I read, at least some synthetic manufacturers have reformulated to keep that from happening. Of course that means that all of the gunk the synthetics used to clean out gets left in your engine now.

In most cases there are only 2 seals affected. The front timing chain cover seal and the rear main seal. If they and any other gaskets do start leaking, then you had a problem there to begin with and the seals or gaskets should be replaced anyways.
I believe my rear main was just getting started before I tried the synthetic oil, so maybe it was destined to happen

When I put Royal Purple in my current Mustang, I had some anxiety for a few days waiting to see if it was going to start leaking. Fortunately, no probs I hope that fancy oil filter is catching some of the debris!
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Old 06-16-2012, 07:38 AM   #32
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I usually stick with castrol 10-30 in my 90 GT but mainly cause I'm a force fan. An castrol never let me down. But after my mods I'm thinking hard about royal purple
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Old 06-16-2012, 07:38 AM   #33
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I run ams oil in everything i own and swear by it! Run it in both my bikes my dad runs it in his 71 chevelle, his harley, **** even the lawn mowers and power washer lol it works amazing!
I didn't think about the lawn mower! I bought a new one last summer, so I think I'm gonna do that
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Old 06-16-2012, 07:42 AM   #34
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I usually stick with castrol 10-30 in my 90 GT but mainly cause I'm a force fan. An castrol never let me down. But after my mods I'm thinking hard about royal purple
I live in the neighborhood right next to his facility in Indiana. Here's me and the Force...
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Old 06-16-2012, 07:53 AM   #35
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If my scanner was working i would be able to send you guys all the paper work i have on royal purple its really not that good of an oil and breaks down extremely fast
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