Official GT 5.0/Boss 302 UOA thread

Stig_v5.0

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Hello again!

I've discovered a small leaking from my differential cover and thus will be doing a fluid change when I pull the cover to re-seal it. I see the 75w140 is the clear recommendation along with friction modifier.

I figure while I'm under the car, I'll change the manual transmission's lubricant as well. This is where it becomes a little unclear to me. I see that it says to use Synchromesh, but the notation states for road racing or if I'm experiencing shifting issues. I don't road race it, and I don't have issues... Is there a different recommendation then? This car is a daily driver in the Chicago area. It will see all ranges of temperature conditions.

Thanks again for all the information here!
 

JDos1

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Hello again!

I've discovered a small leaking from my differential cover and thus will be doing a fluid change when I pull the cover to re-seal it. I see the 75w140 is the clear recommendation along with friction modifier.

I figure while I'm under the car, I'll change the manual transmission's lubricant as well. This is where it becomes a little unclear to me. I see that it says to use Synchromesh, but the notation states for road racing or if I'm experiencing shifting issues. I don't road race it, and I don't have issues... Is there a different recommendation then? This car is a daily driver in the Chicago area. It will see all ranges of temperature conditions.

Thanks again for all the information here!

Ben Calimer, the guy who builds/beefs up the MT82 recommends a blend of 2 qts Amsoil MTF and .7 qts Amsoil MTG. Seems to work very well for most people. I'd go that route.
 

UnleashedBeast

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Ben Calimer, the guy who builds/beefs up the MT82 recommends a blend of 2 qts Amsoil MTF and .7 qts Amsoil MTG. Seems to work very well for most people. I'd go that route.

Even straight Amsoil Synchromesh "MTF" has worked for the locals in Northwest Florida (street use and drag racing only), but this recommendation is something I will have one of them try the next time.
 
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JDos1

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I'd imagine it would. The .7 qts of MTG would help raise viscosity slightly. Something I think the MT82 needs. I've been running straight MTG in this trans for 110k miles with no issues. Excellent shifting. Not something I'd recommend for everyone's climate though.
 

JDos1

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Latest UOA. 14,539 miles on this sample. 1 qt of make-up oil used. As always, Signature Series 10w30 and an EA017 filter. Very impressed at how little oil this car uses at almost 140K miles when some people are using a quart every 5k miles.

SCAN0114_zps6x6phgdj.jpg
 
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Stig_v5.0

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Got around to changing the last of the fluids as of last week. As of right now it's got Severe gear in the back, 2 quarts MTF and 0.7 MTG in the gearbox, and a fill of signature series 5-20 in the crankcase.

The car has 15k miles on it. We'll see how long I can go on this oil. Thinking about bringing it out to 10-12k and having it tested at the lab.
 

JDos1

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Got around to changing the last of the fluids as of last week. As of right now it's got Severe gear in the back, 2 quarts MTF and 0.7 MTG in the gearbox, and a fill of signature series 5-20 in the crankcase.

The car has 15k miles on it. We'll see how long I can go on this oil. Thinking about bringing it out to 10-12k and having it tested at the lab.

Unless you're running E85 or tracking it a lot, take it out to at least 14k. Look at all of my samples...Most of mine still have a TBN of 3+ meaning an easy 2500+ miles of life left in the add pack even after 14k miles of usage.
 

JDos1

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Got around to changing the last of the fluids as of last week. As of right now it's got Severe gear in the back, 2 quarts MTF and 0.7 MTG in the gearbox, and a fill of signature series 5-20 in the crankcase.

The car has 15k miles on it. We'll see how long I can go on this oil. Thinking about bringing it out to 10-12k and having it tested at the lab.

Unless you're running E85 or tracking it a lot, take it out to at least 14k. Look at all of my samples...Most of mine still have a TBN of 3+ meaning an easy 2500+ miles of life left in the add pack even after 14k miles of usage.
 

JDos1

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Latest sample. Took me a while to remember to post up. As always, beautiful. TBN indicates I could have ran this fill out to 17k miles. 149k miles on the engine at this change and right at 15k miles on the oil. Even at 152k miles I'm finding that I only burn about 1.5 qts for every 15k mile change. 0.10 qts per 1000 miles is nothing. Most of that gets caught in the PCV/Catch can.

I recently changed jobs and now my driving will be limited to about 10k miles a year. Fortunately for me I'm saving tons of time and money. Unfortunately for the community, it'll be a while before I pass the 200k mark. lol

SCAN0123_zpstosfdtzl.jpg
 

UnleashedBeast

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You are correct, most of that was in the PCV catch can due to evaporation. The engine is healthy. JDos1, you are the champion of Amsoil extended drain interval UOAs in the Mustang.
 

DanielLD

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Troy, y'all are missing a lot of components in UOA testing. I really like this thread and want to help out. Here's what I can do, I can set up y'all with an account for $25/sample. Includes ICP + FTIR + TAN + TBN + KF + GC + Vc40 + Vc100 + VI. That should help y'all more than what you're getting now.
 

DanielLD

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Also it appears you like Amsoil, lol. But have you heard of RLI BioSyn? It's blown Amsoil out the water in testing, and that's a tough thing to do.
 

UnleashedBeast

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Amsoil reformulated Signature Series with a more robust additive package than every before. Turbo/Supercharging is no longer considered severe service. That's one hell of an accomplishment. I will post links, pictures, and other information as it becomes available.

Also it appears you like Amsoil, lol. But have you heard of RLI BioSyn? It's blown Amsoil out the water in testing, and that's a tough thing to do.

This is an open floor to anyone who'd like to share their experience and testing. Please share links and any other testing articles of interest for others to absorb. It would be nice to add life to this old thread again. I do prefer Amsoil, because in the United States, it's one of the few to still offer a 100% true synthetic formulation.
 

UnleashedBeast

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Here is a link to Amsoil's 2017 reformulation of their Signature Series, XL, and OE lines. All the details are here. Download the file for easier viewing with Adobe Reader.

Click Here
 
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JDos1

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Another 12k mile sample goes in Monday Troy. I believe this may be my last fill with Amsoil before switching over to Schaefer's Supreme 9000 for personal reasons.
 

UnleashedBeast

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With the new formulations - what's your recommendation for turbo applications?

In my 2014 GT with the Armageddon TT kit, I went straight for 5W-50 Amsoil. tried 10W-30 at first, but at low RPM there was a tapping in the bottom end. The turbos were lowering oil pressure too much at idle and off idle. The tapping immediately went away around 2,000 rpm. The extra viscosity of 5W-50 solved that issue. Never tried 0W-40 in the car because I was going to race the snot out of it.
 

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