Home
What's new
Latest activity
Authors
Store
Latest reviews
Search products
Forums
New posts
Search forums
What's new
New posts
New listings
New products
New profile posts
Latest activity
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
Cart
Cart
Loading…
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Search titles only
By:
Menu
Log in
Register
Navigation
Install the app
Install
More options
Change style
Contact us
Close Menu
Forums
Mustang Forums
2011-2014 Mustangs
Engine/Tuning
Official GT 5.0/Boss 302 UOA thread
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="UnleashedBeast" data-source="post: 12527303" data-attributes="member: 112023"><p>Here is a nice <strong><a href="http://www.bobistheoilguy.com/viscosity-charts/" target="_blank">viscosity chart</a></strong></p><p></p><p></p><p></p><p>Amsoil refuses to formulate a 5W-50 for three reasons.....</p><p></p><p>1. Too few vehicles in the world are spec'd for it. I can currently only think of 5 or 6 different cars.</p><p></p><p>2. The formulation is too broad, requiring to many compromises in the base stock formulation that makes it prone to shearing. (i.e. Mobil 1, Red Line, and Motorcraft 5W-50 all shear. MC 5W-50 being the worst).</p><p></p><p>3. It's not required for any abuse you give this car, not even extended session road course racing. </p><p></p><p>You are doing more damage to your engine internals by using it than if you were to change to a true synthetic 10W-40....or 10W-30 using the 170* thermostat. Motorcraft 5W-50 is too viscous in fresh virgin form and the engine's oil pressure will be sky high. This has been confirmed many times in the Coyote/Roadrunner engine. The formulation rapidly shears to a very light 40 grade lubricant (almost a 30 grade) in less than 2,000 miles. The virgin viscosity specs of MC 5W-50 are actually a 20W-50 above 32*F, as SAE numbers on the outside of a lubricant bottle are very misleading. </p><p></p><p>Do you still feel confident using what Ford said you should use?</p></blockquote><p></p>
[QUOTE="UnleashedBeast, post: 12527303, member: 112023"] Here is a nice [B][URL="http://www.bobistheoilguy.com/viscosity-charts/"]viscosity chart[/URL][/B] Amsoil refuses to formulate a 5W-50 for three reasons..... 1. Too few vehicles in the world are spec'd for it. I can currently only think of 5 or 6 different cars. 2. The formulation is too broad, requiring to many compromises in the base stock formulation that makes it prone to shearing. (i.e. Mobil 1, Red Line, and Motorcraft 5W-50 all shear. MC 5W-50 being the worst). 3. It's not required for any abuse you give this car, not even extended session road course racing. You are doing more damage to your engine internals by using it than if you were to change to a true synthetic 10W-40....or 10W-30 using the 170* thermostat. Motorcraft 5W-50 is too viscous in fresh virgin form and the engine's oil pressure will be sky high. This has been confirmed many times in the Coyote/Roadrunner engine. The formulation rapidly shears to a very light 40 grade lubricant (almost a 30 grade) in less than 2,000 miles. The virgin viscosity specs of MC 5W-50 are actually a 20W-50 above 32*F, as SAE numbers on the outside of a lubricant bottle are very misleading. Do you still feel confident using what Ford said you should use? [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Mustang Forums
2011-2014 Mustangs
Engine/Tuning
Official GT 5.0/Boss 302 UOA thread
Top