motorcraft 5W50 replaced by Mobil 1 by ford?
- Thread starter hori
- Start date
Thanks for the info.
From reading UR posts it looks loke Amsoil 10W40 would be best in my 13 Boss that I Autocross about 6 to 8 times a year?
Thanks for the great info and links. So is only amsoil and rp group 4 base? i know i can get amsoil locally from fleet farm, but i know there are may different variations or types of sub categories of amsoil. What type should i be looking for or where should i be getting it. I guess i will be switching soon. I just did a 1000 mile oil change with mc5-50 and didnt even think about it. I will probably change out my dads corvette as well when time comes. Would the same oil and rating apply to him?
I live in mn and will be driving my car march or april til november or december. I could possibly get to freezing or below a few days on each end of when i have the car out. Should that be a concern using 10-30 for just a few days. The car will be in an unheated garage but i suspect the garage will be 40 or so at that time of year.
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Since the road runner motor is high revving you need the extra 50 weight protection. Which also has different heat absorbing characteristics than lighter weight oil.
Tampering with the weight and brand just because some ferrari yuppie did it or because you only toot around town is ignorant. Just do it right and be safe. This is a real no brainer and shouldn't be over analyzed.
Tampering with the weight and brand just because some ferrari yuppie did it or because you only toot around town is ignorant. Just do it right and be safe. This is a real no brainer and shouldn't be over analyzed.
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No problem with the Amsoil 10w40 in cold temps, the oil actually has BETTER cold pumping ability than the factory fill 5w-50!
No, there are many others. However, the new Royal Purple API SN base formulation is no longer a true synthetic. Read the entire thread link below to see Royal Purple's deception.
New Royal Purple
The good news about Amsoil AMO 10W-40, it's actually less viscous at cold starts than Motorcraft 5W-50. SAE numbers on the outside of different products can be very misleading. So many people see "10W" and assume it more viscous in cold weather, when in this instance, it's actually the opposite.
This chart will allow you to visualize how much less viscous Amsoil 10W-40 is at 32*F (0*C) than other popular 5W-50 formulations.
Here we go again. There is always someone who ignores facts about what MC 5W-50 can, and can't do. Road Racing lubricant spec's someone would pay the most attention to is High Temp / High Shear.
50 grade lubricants have a virgin HT/HS spec of ~5.0
40 grade lubricant have a virgin HT/HS spec of ~4.3
30 grade lubricant have a virgin HT/HS spec of ~3.2
20 grade lubricant have a virgin HT/HS spec of ~2.8
HT/HS is the viscosity of a lubricant when it reaches 150*C (302*F). i.e. the temperature of a lubricant around the pistons during long session racing conditions. Having a higher HT/HS is desirable for road racing. Unfortunately, MC 5W-50 will never maintain a 5.0 HT/HS. The viscosity improver polymers rapidly shear on average 35% in this formulation, resulting in HT/HS lower than 4.0
Amsoil 10W-40 will maintain it's viscosity, leaving you with a higher HT/HS for better protection while long session road racing.
Also, lighter grade lubricants will dissipate heat more rapidly than more viscous lubricants. Lower heat means a higher viscosity is maintained overall.
darreng505, need I remind you that the Ferrari guppy you are referring to has a Ph.D in chemistry, specializing in tribology? No offense, but you are taking Ford's recommendation as gospel while ignoring facts that suggest otherwise. Numbers do not lie, businesses selling their proprietary products for profit potential do.
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I'm not taking Ford's recommendation as gospel, but my advice to the average grocery-getter Boss owner is not to hassle with the science of oil. It's not necessary.
And it vastly depends on what you are doing. Viscosity (cold or hot) is not a bad thing. Some people will characterize these qualities in the wrong way and lead people to change their fluids. It's not worth voiding your warranty. There are many other improvements to the car that can be more beneficial than fussing with oil. I'm well aware of the science of oil. I race my car and its important there. For going back and forth to Wal Mart.....no so much.
Comment on voiding the warranty.
If U have an engine or driveline failure, how could the dealer tell what oil is in the motor unless U tell them?
Unless they send it to some lab for an analysis which is unlikely.
If U have an engine or driveline failure, how could the dealer tell what oil is in the motor unless U tell them?
Unless they send it to some lab for an analysis which is unlikely.
LOL @ the "void your warranty" comment.
Even if they did perform a UOA, Amsoil AMO 10W-40 would pass 100%.
*waiting for the first person to say, "but it would fail because it's less viscous."
Incorrect, Motorcraft has sheared down to 12.8 cSt @ 100*C, on average in the 13.x range. Amsoil retains it's viscosity around 14.6 cSt. MC's virgin viscosity is 19.9 cSt @ 100*C. Therefore, viscosity would be sufficient.
Even if they did perform a UOA, Amsoil AMO 10W-40 would pass 100%.
*waiting for the first person to say, "but it would fail because it's less viscous."
Incorrect, Motorcraft has sheared down to 12.8 cSt @ 100*C, on average in the 13.x range. Amsoil retains it's viscosity around 14.6 cSt. MC's virgin viscosity is 19.9 cSt @ 100*C. Therefore, viscosity would be sufficient.
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Has anyone looked into the Lucas oil offerings?
Lucas Synthetic High Performance Motor Oil : Lucas Oil
http://www.lucasoiloffroad.com/lucaspdf/TDS_Syn-SAE_5W-20.pdf
Lucas Synthetic High Performance Motor Oil : Lucas Oil
http://www.lucasoiloffroad.com/lucaspdf/TDS_Syn-SAE_5W-20.pdf
Being that my car is a driver, with little to no drag type racing, your recomendation seems to be a 10-30? After looking at the amsoil link, there is several different categories of oil, which would you recommend? Signature? Seems to be what they call top tier. If i set up an account and buy online, how long would it be for them to send it to me? Do they require a signature for it?
Thanks for all the help
Thanks for all the help
Cheap base oils. Pennzoil Ultra is much better.
What weight Pennzoil Ultra would you recommend for a '13 Boss that is primarily used for sunny weather cruiser, backroads corner carver with some spirited driving, and some very light drag strip use. Currently sitting at 950 miles & still have the original fill Motorcraft in.
Pennzoil Ultra 10W-30 or 0W-40
I'm really itching to get a UOA from 0W-40 to see how much it shears.
Well, okay, but doesn't this mean that Motorcraft 5W50 is a bad idea in the GT500? After all, it is 50 weight initially, is it not?
Would that not mean that we should expect to see elevated lead in the UOAs of those GT-500s that are running on Motorcraft 5W50, though not as much as for RL?
Not a "bad" idea, just not the best choice. Ford knows MC 5W-50 shears, they want it too. 50 grade lubricants are not required for this application for street use, which is where most cars are used.
You don't need a supercharger for street use. Or recaros. Or 6piston brakes. Or any of the other performance parts ford puts on its "street" cars. So why not swap those too?
That logic is just dumb.
That logic is just dumb.
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