Opinions on this mix

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10cent

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Raleigh NC
Well I've finally settled on an oil to run in the Hemi so I'm on to the Mustang. It is a 2006 GT 5-speed with a JLT larger than stock diameter intake, BBK LT headers, NO CATS, Borla Stinger exhaust, and 93R Bama tune. The only mod that plays into my decision is the 93 octane Bama tune. It is the most aggressive file they sent me. I live in central NC so it is in the mid 90's throughout the summer. The car is mostly driven on short trips as I live in the city. Mileage wise it may see 200 miles in a month.

I'd like to go a step heavier than 5w20 given the tune (possible fuel dilution), short trips, and high temps here. Redline is my first choice but I'm not paying $75 to change the oil given my habit of changing too early.

The mix I'm thinking is 5 quart jug of M1 HM 5w30 and 1 quart of M1 EP 5w20 mixed in to thin it just a bit since it is on the thicker side. I'm wanting something with a good shot of moly and ZDDP that will also has a stout cleaning package.

I'm open to suggestions but no thick vs thin debating please.
 
You got the v8?

If so, any 5W-20 or 5w30 should be OK. Though, AFAIK, that vehicle actually specs 5W-20 - but since you do have the modifications, you could probably get by with a 5w30.....

I did find mention of the following:
Quote:
[1] Manufacturer recommends motor oil that is formulated to meet
Ford specification WSS-M2C930-A.


So, as long as your oil of choice meets that spec, you should be OK......

But......something tells me "WSS-M2C930-A" is only met for certain "5W-20" oils......
 
Originally Posted By: ahoier
You got the v8?

If so, any 5W-20 or 5w30 should be OK. Though, AFAIK, that vehicle actually specs 5W-20 - but since you do have the modifications, you could probably get by with a 5w30.....

I did find mention of the following:
Quote:
[1] Manufacturer recommends motor oil that is formulated to meet
Ford specification WSS-M2C930-A.


So, as long as your oil of choice meets that spec, you should be OK......

But......something tells me "WSS-M2C930-A" is only met for certain "5W-20" oils......


Yeah it is a GT. It does spec 5w20 which is what I've been using (Motorcraft) since I purchased the car with 8,000 miles on it. It just ticked over 54,000 this past weekend.

I recently purchased a new home close to my office and my driving has been severely reduced and nearly all of the driving I actually do is in the form of short trips (<4 miles). This and the tune are the main reasons I'm considering the 5w30. I'm looking for the best protection possible given these circumstances.
 
Originally Posted By: demarpaint
How about this, do a UOA with the 5W20, and a UOA with the 5W30 and see?


Given the often contradictory reports from the same and different labs I honestly do not put much faith in UOA's. I was of the opinion that they were at least good at tracking wear but the more I read the less I feel this is the case. At any rate I certainly don't have enough faith in them to invest my time and money. I do so enjoy looking at them though.
grin.gif
 
Last edited:
Originally Posted By: 10cent
Originally Posted By: demarpaint
How about this, do a UOA with the 5W20, and a UOA with the 5W30 and see?


Given the often contradictory reports from the same and different labs I honestly do not put much faith in UOA's. I was of the opinion that they were at least good at tracking wear but the more I read the less I feel this is the case. At any rate I certainly don't have enough faith in them to invest my time and money.


I hear ya, just thought I'd toss that out, since it is really the only scientific way to know [one would hope]. It might give some indication of fuel dilution and possible viscosity loss. Then you could make a choice on based on that. The wildcard is how accurate the report is, and your faith in the lab??????
21.gif
 
Originally Posted By: demarpaint
Originally Posted By: 10cent
Originally Posted By: demarpaint
How about this, do a UOA with the 5W20, and a UOA with the 5W30 and see?


Given the often contradictory reports from the same and different labs I honestly do not put much faith in UOA's. I was of the opinion that they were at least good at tracking wear but the more I read the less I feel this is the case. At any rate I certainly don't have enough faith in them to invest my time and money.


I hear ya, just thought I'd toss that out, since it is really the only scientific way to know [one would hope]. It might give some indication of fuel dilution and possible viscosity loss. Then you could make a choice on based on that. The wildcard is how accurate the report is, and your faith in the lab??????
21.gif



Exactly. If I had faith in the lab that would be the plan. As things stand I just don't get a warm comfy feeling from the things I've seen.
 
I guess I should clarify that I'm debating between this mix and Motorcraft Full Synthetic 5w30. I cannot find any significant amount of info on the full syn Motorcraft however.
 
Originally Posted By: 10cent
Exactly. If I had faith in the lab that would be the plan. As things stand I just don't get a warm comfy feeling from the things I've seen.


You my friend are in good company!
 
If the tune in your engine was developed specifically for deleted cats, I wouldn't be surprised that the Air-Fuel ratio has actually been leaned out. This would mean less possibility of fuel dilution. Modern cars are tuned WAY FAT from the factory to reduce exhaust temperature and protect the cats. They would actually make more power if they were leaned out, but protecting the cats requires over-rich mixtures. Can you find out from your tuner what they actually did with the A/F?

The semi-syn Motorcraft 5w20 is probably still OK for your engine, but if you want to go up to 5w30 out of respect for high operating temperatures, I don't see a problem. And since your cats are gone, you can go to higher zddp, but the Ford Modular doesn't really need it.
 
Last edited:
Originally Posted By: A_Harman
If the tune in your engine was developed specifically for deleted cats, I wouldn't be surprised that the Air-Fuel ratio has actually been leaned out. This would mean less possibility of fuel dilution. Modern cars are tuned WAY FAT from the factory to reduce exhaust temperature and protect the cats. They would actually make more power if they were leaned out, but protecting the cats requires over-rich mixtures. Can you find out from your tuner what they actually did with the A/F?

The semi-syn Motorcraft 5w20 is probably still OK for your engine, but if you want to go up to 5w30 out of respect for high operating temperatures, I don't see a problem. And since your cats are gone, you can go to higher zddp, but the Ford Modular doesn't really need it.


I can't be certain what they actually did to adjust for the cats but the tune does account for the modifications. Good point.
 
Originally Posted By: A_Harman
They would actually make more power if they were leaned out, but protecting the cats requires over-rich mixtures. Can you find out from your tuner what they actually did with the A/F?


Leaning would only be at higher throttle openings, part throttle cruse A/F ratio should be 14.7 to 1 on any tune... At least it is on my Marauder and yes I have a wide band A/F ratio gauge...
 
Originally Posted By: TFB1
Originally Posted By: A_Harman
They would actually make more power if they were leaned out, but protecting the cats requires over-rich mixtures. Can you find out from your tuner what they actually did with the A/F?


Leaning would only be at higher throttle openings, part throttle cruse A/F ratio should be 14.7 to 1 on any tune... At least it is on my Marauder and yes I have a wide band A/F ratio gauge...


+1

I wouldn't mix any oils. 5w20 or 5w30 motorcraft should work just fine, imo.
 
Originally Posted By: TFB1
Originally Posted By: A_Harman
They would actually make more power if they were leaned out, but protecting the cats requires over-rich mixtures. Can you find out from your tuner what they actually did with the A/F?


Leaning would only be at higher throttle openings, part throttle cruse A/F ratio should be 14.7 to 1 on any tune... At least it is on my Marauder and yes I have a wide band A/F ratio gauge...


Out of curiosity what oil do you run in the Marauder?
 
Originally Posted By: 10cent
Originally Posted By: TFB1
Originally Posted By: A_Harman
They would actually make more power if they were leaned out, but protecting the cats requires over-rich mixtures. Can you find out from your tuner what they actually did with the A/F?


Leaning would only be at higher throttle openings, part throttle cruse A/F ratio should be 14.7 to 1 on any tune... At least it is on my Marauder and yes I have a wide band A/F ratio gauge...


Out of curiosity what oil do you run in the Marauder?


On recommendation from some of the guys here on BITOG and that Ford specs something heavier in their Hi-Perf engines than 5W-20, I went with Mobil-1 0W-40... A 30 weight would no doubt have been fine, but I decided on the 0W-40 as it meets most of the tougher European specs...

Supercharger is added from a '03 Cobra Stang...
 
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