coolmac

Those with modded 5.0, using a 5W-50 synthetic for cheap insurance, a good
idea?

This should run cooler and might save a engine.

What do you think . . .

BlackMamba03

check out svtperformance.com and search for a member called UnleashedBeast. He can tell you anything and everything about oil. Talk with him before doing anything.

Glenn

I think ful syn oil is always a good idea. I switched from full syn oil to fords part syn oil a while back to save a few bucks. from what I have seen the part syn oil is very good stuff and good for 7500 miles.

2012GT

I called Steeda today about this. Their in-house coyote is 5w20 at over 500rwhp. In a nutshell after a lengthy duscussion, Gus recommends that I do the same. I read "unleashedbeasts" arguments and they are very logical and he seems knowledgeable. However, until the top race companies like Steeda etc recommend 30+ weight oil, I'm staying with 5-20 synthetic.

BlackMamba03

5w20 full synthetic is great. I use it in my F-150, works great but I'll be switching to 10w30 here next week for my oil change. The thing with 5w20 is that it's not recommended for long term use. You said you've read UnleashedBeast's comments and opinions, it's your call to use what oil you want but heavily consider his ideas as that's his job. Just because the big companies aren't using it doesn't mean it's not a good idea. Just so it's out there, not trying to argue or anything. Finally, the Boss and Shelby GT500 both use 5w50. According to UnleashedBeast, it breaks down to 5w30 after extended use. Personally, I don't want to use an oil that breaks down over time when I can buy perfectly full synthetic 10w30 to begin with. Good luck with whatever you chose friend.

2012GT

Black Mamba, I think this is actually one of those issues that doesn't have a right or wrong answer at this point. If my motor goes boom at 75k under normal driving, and yours lasts 200k driving it like a raped ape, then I'll say, "yep blackmamba tried to tell me." Right now though, there just isn't any empirical evidence for either of us to say you're wrong and im right. This is like politics, listen to the arguments and then decide on how to cast your vote. I would like to meet unleashedbeast simply because we have the same name(Troy) for real!! --lol. No, but seriously I like his thinking and would love to talk to the guy sometime.------

Could you link some of his arguments about running 5w or 10w-30 in the coyotes? Thanks man. Troy

BlackMamba03

Ya man no problem, here's a link to a thread from the svtperformance forum website. Should answer any questions you have about synthetic oils and oil in general. It's all about the new 5.0 and UnleashedBeast has many posts and comments in it. Hope this helps friend.

http://www.svtperformance.com/forums...etic-oils.html

hawkeye18

Does anybody know how differently weighted oil will affect the Ti-VCT system? It uses static oil pressure to operate the cams. Theoretically, a thicker oil would slow the system down somewhat, but I don't know of anybody that has any empirical data to prove it either way. It seems like something I'd want to keep an eye on.

2012GT

Blackmamba, this hit me like a ton of bricks today. Pass this on to unleashedthebeast. I was a police officer until last year. All of our 4.6 Crown Vics had their oil changed every 3,000 miles with conventional 5w20. We would auction the cars at 120k some even up to 150k. In short , the cars still ran very strong. So longevity being an issue when running cars harder with 5-20, isn't true. We ran the crap out of the 4.6 crown vics using conventional 5-20 and they were bulletproof.

BlackMamba03

I'll admit the 4.6L is a great engine. I've got it in my F-150 and it's got just over 133k miles on her. She runs excellent and I've always put 5w20 in her. My most recent oil change (2 weeks ago) I went with 5w20 just cause I was short on cash that day. I live in Iowa and before winter decides to hit, I'm going to switch to a full 10w30 synthetic. Basically what I've gotten out of talking with UnleashedBeast is that the physical makeup of 5w20 and 10w30 are completly different obviously. Plus the 10w30 is a FULL synthetic and alot of 5w20 oils aren't. It's confusing to me still but I'm going to take his advice and give the 10w30 a shot. I'm gonna go with Mobil 1 Extended Performance which I'll use for 5,000 miles.

I hope your 5.0 motor is running great. It's such a beast of a motor.

2012 grabber blue gt

The 4.6 is great I have a 2002 f150 with 186 k and runs like new

black5.0

I have a new 5.0 aluminator w/9.5:1. It calls for 5w50.

BlackMamba03

What oil are you using? Hopefully not the Motorcraft crap. Breaks down to a mid 30-grade after some use. I'd run Mobil 5w50 or Amsoil 10w40.

Scuba-Matt

If you run mobil one, make sure its the extended life. The regular Mobil one isn't a true synthetic. Only the extended life is a true synthetic.

BlackMamba03

True story but they're aren't alot of companies who make a 5w50 motor oil. Also, Mobil One doesn't make 5w50 in the Extended Performance formula which sucks.

JAJ

The only 5w-50 Mobil makes is the Mobil 1 5w-50 that's factory fill in the Mercedes Benz AMG McLaren SLR.

BlackMamba03

Yes, I know there's only one variant of the 5w50. However, it's available for purchase in stores and there's guys running it in their Boss 302's currently.

jaguarking11

Oil breaking down from 5w-50 to 5w-30 you say?

FYI, that is normal, allot of the European cars with tight tolerances, last gen m3 with the i6 for example ran very heavy oil. Guess what it all breaks down to 30weight oil or thinner due to tolerances and heat.

FYI, I was using 5w-20 Penzoil Platinum in my old car, when they analyzed it it was closer to a 30 weight oil than a 20weight. Some 30weight oils are thinner than 30 weight some are nearly 40 weight. The SAE allows them to have some variation.

My question to the op would be what is the intended use of the engine?

If your going to track the car, by track I mean road courses. Then run 5w-50 and the boss302 oil cooler. And change the stuff out once a season, or if run very hard after the track day.

If your daily driving it. Put in a good quality "synthetic" in the specified weight. The stock oil and sump size dictate that the oil filter will need replacement before the oil FYI. The filters tend to break down over time and repeated heat cycles make that worse. So replace the filter at least once every 6months if your not over the mileage.


5w-20 is good oil as long as long as you don't overheat it. The 5w-50 will give you a slightly better thermal breakdown threshold. But not much else. The tolerances of the engine will break down anything that is too big and reduce it to its specified needs, not only that but I would be more worried about the blow by contaminating the oil than the oil itself. Even the motorcraft 5w-20 is a very good oil.

Basically look at your needs and go from there. There is no magic bullet. Although my car being a daily driver, why would I sacrifice mileage for a higher thermal threshold, especially when that thermal threshold will never be reached.

Bmeline916

I'm running royal purple 5w-30 this is a true synthetic right? Should I run 5w-50? I'm full bolt on and run my car hard! Opinion

BlackMamba03

You're just fine with 5w30. I believe Royal Purple is one of the only TRUE synthetics.