10w 30 full synthetic

[BmacIL]

While i am definitely a pennzoil platinum or ultra guy there is more to a uoa then just what youve expressed Bmac. But im sure you know that. You and i both know that amsoil over all is a superior product typically. For my daily sti I use hyper myself. But for my fun cars i use amsoil. You might find that backwards but i dont run my daily as hard as my race cars. There used to be a day were mobil 1 used to rival amsoil but those days are long gone since early 2000s when mobil changed its forumla. I do not think pennzoil ultra is that m1/amsoil rival replacement but i find it to be close enough.

There certainly is, it just happens to be one of the more important variables for protection. Ultra also has exceptional shear capacity and is keeping a surprisingly high TBN for the mileage. It's an excellent oil for hard street and very occasional road course (HPDE) track use. If I were racing or doing primarily track driving, I'd also go with an oil like Amsoil's racing-oriented stuff.

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[Nataphen]

I'm sure that the Boss, track pack, and GT350 have 5W-50 factory fill because they've tried to compensate for the fact that Motorcraft oil shears so much. I wish that they'd approve Amsoil 5W-30 or 5W-40 as a replacement as those are more appropriate weights in my opinion. 5W-50 Amsoil seems to be overkill, but Ford approved it for OEM replacement. I'd rather run the Amsoil 5W-50 than Motorcraft 5W-50 if I was worried about being extra careful to stay in warranty.

I also run Amsoil on my weekend cars and PP on our daily drivers. I think it's a good oil for the price for 99% of the time. We did constant UOAs in the Mazdaspeed 3 and 6 community, and PP held up very well.

 

[mustang_guy]

WSS-M2C945-A=API SN;ISLAC GF-5. If ford tries to deny anyone using amsoil most amsoil dealers want you to contact them with the dealer name and persons name that told you this. They take it serious and will follow up with them. Fords mc 5w50 isnt even 50 after 1000 miles. Its garbage in my opinion

 

[whatsup62]

I see in the "other" post the recommendation is Amsoil SS 0w-40.

 

[m6pwr]

WSS-M2C945-A=API SN;ISLAC GF-5. If ford tries to deny anyone using amsoil most amsoil dealers want you to contact them with the dealer name and persons name that told you this. They take it serious and will follow up with them. Fords mc 5w50 isnt even 50 after 1000 miles. Its garbage in my opinion

I think it's fairly well established under the Magnusson-Moss Warranty Act that a mfr cannot condition its warranty on the customer using only certain brands of products, but it can condition the warranty on the customer using products that meet a prescribed performance standard available in the public domain, e.g. WSS-M2C945-A spec prescribed for motor oil used in the Coyote V8. There are a lot of 5w20 oils formulated by their mfrs. that meet this spec., Amsoil 5w20 being one of them. I haven't yet come across a 5w30, 0w40, etc. oil that meets that spec.

As for mc 5w50 shearing back, that's hardly unique or a deficiency, particularly among multi vis oils with a wide viscosity range. I know that Castrol TWS 10w60 out of the bottle is a "thin" 60 weight (at 100 degrees C), right at the bottom of the 60 weight viscosity range, almost a 50 weight, and it very quickly shears back in use to a heavy 40 weight. So what. Besides being used in many of the BMW M street cars, its been used for decades in BMW factory racing programs like the German Touring Car Championship and in WEC endurance racing in cars like the McLaren F1 GT. It's a dynamite oil in the prescribed application.

Mobil 1 0w40 oil is another oil that is barely a 40 weight out of the bottle and it shears back quickly to a heavy 30 weight. No big deal.

And by the way, how do you know that Amsoil, like Mobil 1, hasn't changed its formulation? Most motor oil mfrs are constantly changing their formulations to take advantage of advances in lubrication chemistry, particularly in advances in additive performance and base stock refining technology. The Grp III+ oils of today, in their prescribed applications, are as good as the Grp V ester base oils were 15 or 20 yrs ago. Castrol TWS 10w60 was an ester base Grp V oil (originally called Castrol RS 10w60) when it came out in the early 90's. Today, i believe it is a Grp III+ oil with an outstanding additive pack far superior to the original.

 

[mustang_guy]

Ford does not maintain a list of API Certified oils. I can only give you information that I have from being a Ford owner and ex ford master tech. If you contact Ford regarding oil Ford is going to recommend Motorcraft. To get a different answer you have to talk to a company representative. If an issue can not be resolved thru the service manager you need to contact the Ford service representative for your area. This would not be the first time a dealership service manager has contradicted a manufactures policy. Also from experience I must of have a lot of luck because I have taken in my vehicles to have warranty service completed and each dealership did not even ask if I kept service records.

Also if you want to pay you can check the link below, a website that will go into detail of the WSS-M2C945-A specification.

http://infostore.saiglobal.com/store/Details.aspx?ProductID=1430718

As far as mc 5w50 its a sheering monster. Worse then anything ive ever seen. Its garbage.

Id like to share this for those that think amsoils 10w30 is too thick for 32 degrees http://www.teamshelby.com/forums/in...at-is-the-best-oil-to-use/page-2#entry1135426

 

[m6pwr]

I don't have your long association with Ford; my 2015 Mustang GT is my first Ford; prior to that, 20 BMWs over many, many years. But I'm really liking my new GT.

A very experienced lubricants engineer named Doug Hillary (some of you who regularly surf the BITOG oil forum may know him), who has worked for both Castrol and ExxonMobil, once advised me that the best practice is to always follow the oem's specs and recommendations to the letter (punctuated with three exclamation points). Seems like good advice from a real pro.

I'm an Owner's Manual reader. In mine, on p. 278, it specs WSS-M2C945-A oil for the 5.0 motor (presumably any oil that meets that spec., not just Motorcraft). On p. 276 it says "If you use oil and fluids that do not meet the defined specification and viscosity grade, this may lead to component damage, which the vehicle warranty does not cover . . .".

I agree totally that most dealers don't question the oil used or other service background when handling many types of warranty claims. But on a warranty claim for an oil-related failure on an engine, the Ford field rep might start asking questions. But as a practical matter it would still be difficult to determine what oil was in the motor when it failed. So its a moot point. And I don't think using xw30 or xw40 in the Coyote is going to cause any problems or failures, but I doubt the supposed benefits.

I'm not trying to convince you, Mustang Guy, to use any particular oil in your car. You're obviously going to use what has worked for you and that's ok for you. But for "newbies" like myself who may be following this thread, I think the best advice is to just follow the manufacturers recommendations to the letter!!!

 

[mustang_guy]

I don't have your long association with Ford; my 2015 Mustang GT is my first Ford; prior to that, 20 BMWs over many, many years. But I'm really liking my new GT.

A very experienced lubricants engineer named Doug Hillary (some of you who regularly surf the BITOG oil forum may know him), who has worked for both Castrol and ExxonMobil, once advised me that the best practice is to always follow the oem's specs and recommendations to the letter (punctuated with three exclamation points). Seems like good advice from a real pro.

I'm an Owner's Manual reader. In mine, on p. 278, it specs WSS-M2C945-A oil for the 5.0 motor (presumably any oil that meets that spec., not just Motorcraft). On p. 276 it says "If you use oil and fluids that do not meet the defined specification and viscosity grade, this may lead to component damage, which the vehicle warranty does not cover . . .".

I agree totally that most dealers don't question the oil used or other service background when handling many types of warranty claims. But on a warranty claim for an oil-related failure on an engine, the Ford field rep might start asking questions. But as a practical matter it would still be difficult to determine what oil was in the motor when it failed. So its a moot point.

I'm not trying to convince you, Mustang Guy, to use any particular oil in your car. You're obviously going to use what has worked for you and that's ok for you. But for "newbies" like myself who may be following this thread, I think the best advice is to just follow the manufacturers recommendations to the letter!!!

Any api sn will be covered. I was with Ford til mid way through 2012 which i then moved over to bmw. Been a master tech since after the first yearish of being here. Ive heard of him. Some like doug prefer to follow the owners manual. I obviously dont. Engine weight failures are pretty far and few between. My only advice to owners manual followers if they are scared of other weights is to get off the mc 5w20 to something like Penz ultra and possibly 5w30 if they are comfortable enough.

 

[whatsup62]

But for "newbies" like myself who may be following this thread, I think the best advice is to just follow the manufacturers recommendations to the letter!!!

Perfect! Problem solved for the newbies.

Now on to what started the thread in the first place.
I would like to hear some of the FI guys choices.
I currently am running 5w-20. I do live in a cold climate drive it like I stole it most of the time, and I change oil twice a year...don't care what it cost. I am leaning to 10w-30 half year and 5w-30 the other half. I will be FI by next oil change. Also thinking about staying with RP but might change to Amsoil.

 

[mustang_guy]

Perfect! Problem solved for the newbies.

Now on to what started the thread in the first place.
I would like to hear some of the FI guys choices.
I currently am running 5w-20. I do live in a cold climate drive it like I stole it most of the time, and I change oil twice a year...don't care what it cost. I am leaning to 10w-30 half year and 5w-30 the other half. I will be FI by next oil change. Also thinking about staying with RP but might change to Amsoil.

Definitely switch to amsoil. Im not all that impressed with rp. ESPECIALLY what they charge.

 

[BmacIL]

Perfect! Problem solved for the newbies.

Now on to what started the thread in the first place.
I would like to hear some of the FI guys choices.
I currently am running 5w-20. I do live in a cold climate drive it like I stole it most of the time, and I change oil twice a year...don't care what it cost. I am leaning to 10w-30 half year and 5w-30 the other half. I will be FI by next oil change. Also thinking about staying with RP but might change to Amsoil.

Any reason for wanting to go 10w-30, instead of 5w-30 year round? An amsoil or pennzoil ultra of this weight would be more than enough for hard street driving, even in hot weather.

 

[whatsup62]

Any reason for wanting to go 10w-30, instead of 5w-30 year round? An amsoil or pennzoil ultra of this weight would be more than enough for hard street driving, even in hot weather.

Nope...after reading through everything I probably will just stick with the 5w-30. I was thinking the 10w-30 would have less shear and therefore be better in the hotter months when the car will see track time. But the 5w should work year round for me just fine.

 

[Choking_Victim]

thinking of switching to full synthetic.. I know the topic has been beating to death. Car get driven aggressively from time to time, and our summer get well over 110 degrees. was thinking Pennzoil Ultra platinum in factory weight 5w20 or upping to 5w30. Would like to keep year round 5k intervals. coldest it seems is mid to high 20's

 

[mustang_guy]

thinking of switching to full synthetic.. I know the topic has been beating to death. Car get driven aggressively from time to time, and our summer get well over 110 degrees. was thinking Pennzoil Ultra platinum in factory weight 5w20 or upping to 5w30. Would like to keep year round 5k intervals. coldest it seems is mid to high 20's

Ultra is a good choice.
5w30 since your summers get so hot. In colder months 5w20 if you felt better using thinner in winter.

 

[Choking_Victim]

Ultra is a good choice.
5w30 since your summers get so hot. In colder months 5w20 if you felt better using thinner in winter.

Thanks I'll pry just go 5w30 and run that year round..should be fine.

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