Recommended Motor Oil


BlackICE

GT Owner
Nov 2, 2005
1,416
SF Bay Area in California
Keep in mind what a race team uses has no bearing on what your everyday driver should use. They change to oil after each event and they have very consistent parameters that the engine operates under. I would submit that oil requirements for your street car are much harder to meet.

+1

Also I wouldn't be surprised if the oil used in the race engine may not be the oil of the sponsor!
 

2112

Blue/white 06'
Mark II Lifetime
Well, I understand your points and believe them to be accurate.......but

In the marine world, where huge stroke, heavy valvetrain pushrod engines are making 800, 900, 1000, 1100 1200, 1300 Horsepower, and are under load 100% of the time and expected to live over 100 hours of use before overhauls, are not using oils designed for street application.

I understand your point that the factory recommended oil is formulated for it's own harsh environment, namely neglect (to service etc). But does that make the oil the best for bearing cushion and/or actual friction reduction, let alone resistance to breakdown under extreme conditions?

Just asking.
 
Aug 25, 2006
4,436
Well, I understand your points and believe them to be accurate.......but

In the marine world, where huge stroke, heavy valvetrain pushrod engines are making 800, 900, 1000, 1100 1200, 1300 Horsepower, and are under load 100% of the time and expected to live over 100 hours of use before overhauls, are not using oils designed for street application.

I understand your point that the factory recommended oil is formulated for it's own harsh environment, namely neglect (to service etc). But does that make the oil the best for bearing cushion and/or actual friction reduction, let alone resistance to breakdown under extreme conditions?

Just asking.

A very good question

The oil that has been suggested and used by many over the years is Chevron Delo 100 or Shell's Rotella; these oils have the ability to cushion the bearings under some of the most extreme of situations.

In the end my usage of the OEM products is a practice developed many years ago regardless of the marquee even though I understand that in the world of private labeling the brand of oil within the container is often times ever changing and furthermore as an OEM product it is a viable profit center for them hence they suggest and encourage the use of it. So is the OEM oil mechanically better than others; I would say the answer could only be given if the application, the operation of the vehicle, the conditions, etc were all taken into consideration and then I suspect that the pendulum would swing back and forth between brands as each have their own unique additives within.

Takes care

Shadowman
 

BlackICE

GT Owner
Nov 2, 2005
1,416
SF Bay Area in California
A lot of racing oils are single viscosity and before the engine is started the oil is pre-heated in the pits to the correct temperature. I can just see how well that would go over with the average customer.
 

fjpikul

GT Owner
Mark IV Lifetime
Le Mans 2010 Supporter
Jan 4, 2006
11,786
Belleville, IL
2112, I suggest you review the long threads on oil here, especially the eloquent but long dissertation by IndyGT.
 

RALPHIE

GT Owner
Mar 1, 2007
7,278
2112, I suggest you review the long threads on oil here, especially the eloquent but long dissertation by IndyGT.

And, here are some questions:

XO-5W50-QGT did not exist prior to the building of the Ford GT - why was it specifically developed? Was it worth spending the time to develop a new product for a car run of 4,038 vehicles? Did this formula already exist in Ford's engine development laboratory for high performance all-aluminum engines?

I don't know the answers, but I don't think they developed a new product for "The One", the Pace Car of the Entire Company, on a whim.... Or as a marketing profit center. If they were going to build 500,000 or more vehicles, then I could see a profit motive, but for 4,000 cars, it's a waste of time.
 
Aug 25, 2006
4,436
And, here are some questions:

XO-5W50-QGT did not exist prior to the building of the Ford GT - why was it specifically developed? Was it worth spending the time to develop a new product for a car run of 4,038 vehicles? Did this formula already exist in Ford's engine development laboratory for high performance all-aluminum engines?

I don't know the answers, but I don't think they developed a new product for "The One", the Pace Car of the Entire Company, on a whim.... Or as a marketing profit center. If they were going to build 500,000 or more vehicles, then I could see a profit motive, but for 4,000 cars, it's a waste of time.


RALPHIE I enjoy triva ..... even at this hour of 4:00am

I did not know that the oil was developed in concert with these gals; I likely was told and or read it at one time however it did not stick.

Reading your post makes me even happier that as a matter of practice I use only OEM products.

Very cool RALPHIE

Takes care

Shadowman
 

RALPHIE

GT Owner
Mar 1, 2007
7,278
XO-5W50-QGT did not exist prior to the building of the Ford GT....

The 2005 Motorcraft Chemicals and Lubricants Catalog states:

SAE 5W-50 Full Synthetic Motor Oil, Part Number XO-5W50-QGT

Features:
• Motorcraft® SAE 5W-50 Full Synthetic Motor Oil is designed, engineered and recommended by Ford Motor Company for use in the Ford GT. It meets API Service Category SL/CF
• It is manufactured with high viscosity index, premium-quality synthetic base oils and performance additives to provide wear and oxidation protection under severe operating conditions. It is resistant to deposit formation, including supercharged and turbocharged applications. It provides quick flow to engine parts during start-up and lubricates effectively over a wide temperature range
• This oil is compatible with other synthetic and petroleum based formulations


Similarly, for the transaxle fluid:

SAE 75W-90 Premium Synthetic Transaxle Lubricant, Part Number XT-75W90-QGT

Features:
• Motorcraft® SAE 75W-90 Premium Synthetic Transaxle Lubricant is a premium-quality lubricant designed, engineered and recommended by Ford Motor Company for use in the Ford GT transaxle
• It provides excellent gear change and synchromesh performance even at low temperatures
• It provides complete lubrications for reduced wear
• This fluid is compatible with other synthetic and conventional mineral oil axle lubes

Not to say that other Motorcraft synthetics didn't exist, as they already had SAE 10W-30 Premium Synthetic Blend Motor Oil, XO-10W30-QSP, SAE 75W-140 Synthetic Rear Axle Lubricant, XY-75W140-QL and SAE 75W-90 Synthetic Axle Lubricant, XY-75W90-QLS in their offerings of lubricants prior to and after the Ford GT development. In 2005, the only application for these two fluids was the Ford GT. In the 2006/2007 catalog, they changed the motor oil feature to read "...for use in the Ford GT and Shelby GT500. It meets API Service Category SM", but the transaxle fluid was still unique to the Ford GT. A notable difference in the change from API "SL/CF" to "SM" was a change in the color of the container cap from black to gold.
 
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Specracer

GT Owner
Mark IV Lifetime
Nov 28, 2005
7,205
MA
There was some VERY detailed posts I think by "indy GT" If I recall that were WAAAYYYY over my head, but in a nutchell is suggested that the magic of an oil were the additives. And the motorcraft was GT specific for our engine. Good enuf for me. I am sure others will do no harm (castrol etc), but as long as the motorcraft is available, and not a HUGE premium, I will use it.

Aslo as a side note, it is the oil used in the GT500. SO if the oil was specifically designed for the GT, it's use has been expanded to 10's of thousands of other cars.....
 

Howard

GT Owner
Mark IV Lifetime
Apr 26, 2007
1,160
Florida/North Jersey
As many of you know, the change from API SL to API SM included a reduction in ZDDP content for Energy Star rated oils, which DO NOT include 5W-50 weight oils. Nevertheless, many suppliers have been accused of lowering the ZDDP content on non-Energy Star oils, including Mobil 1. ZDDP has been used for decades as a sliding friction lubricant additive, most useful in lubricating rocker arms and cams. Most modern engines are less dependant on ZDDP but the oil manufacturers insist that the ZDDP-reduced formulation is safe for all applications, including older engines like my 1976 911. The debate rages on, on other web site Forums like the Pelican Parts Porsche Forum. I agree with the Shadow; stick with the OEM recommendation, especially for modern engines.

Howard
 

2112

Blue/white 06'
Mark II Lifetime
It is the additives like ZDDP that Gibbs and Amzoil (and Mobil 1 V-twin) have over the oils engineered for mass consumption.
 

2112

Blue/white 06'
Mark II Lifetime
2112, I suggest you review the long threads on oil here, especially the eloquent but long dissertation by IndyGT.

Will do. Thanks

For the record, I am not dissing the Motorcraft oil. I am just asking the questions that obviously you guys have been hashing out for years here...i am just a new guy. :biggrin

BTW, I bleed Ford Blue and insist on FoMoCo and SVO parts whenever possible for all my Ford Products. (except plugs, now that I discovered NGK). :thumbsup
 

BlackICE

GT Owner
Nov 2, 2005
1,416
SF Bay Area in California
And, here are some questions:

XO-5W50-QGT did not exist prior to the building of the Ford GT - why was it specifically developed? Was it worth spending the time to develop a new product for a car run of 4,038 vehicles? Did this formula already exist in Ford's engine development laboratory for high performance all-aluminum engines?

I don't know the answers, but I don't think they developed a new product for "The One", the Pace Car of the Entire Company, on a whim.... Or as a marketing profit center. If they were going to build 500,000 or more vehicles, then I could see a profit motive, but for 4,000 cars, it's a waste of time.

It does if the long term plan was to also spec it for the GT 500.
 
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tpraceman

THEE GT OWNER
Mark II Lifetime
Le Mans 2010 Supporter
Feb 20, 2006
2,835
Washington Michigan
I asked Gibbs to look into using their racing oil for the GT.

Thye answered back NO the Gibbs oil would not fit a GT in either race trim or street trim. This was wthout explanation.

I buy stock Ford Oil from Torrie
 

tmcphail

GT Owner/Vendor
Mark IV Lifetime
Apr 24, 2006
4,112
St Augustine, Florida
I asked Gibbs to look into using their racing oil for the GT.

Thye answered back NO the Gibbs oil would not fit a GT in either race trim or street trim. This was wthout explanation.

I buy stock Ford Oil from Torrie

And mysteriously Tom finds more cases of it on his front porch:lol:lol
 

2112

Blue/white 06'
Mark II Lifetime
This was with out explanation.

Unfortunate. :frown
 

nsfkid

FORD GT OWNER
Mark II Lifetime
Sep 23, 2007
131
Port Credit Ontario
I second that, The only way to go on a GT is OEM.

Mike
 

Fubar

Totally ****** Up
Mark II Lifetime
Le Mans 2010 Supporter
Aug 2, 2006
3,979
Dallas, TX
Old article but interesting

http://www.lnengineering.com/oiltest.pdf
 

fjpikul

GT Owner
Mark IV Lifetime
Le Mans 2010 Supporter
Jan 4, 2006
11,786
Belleville, IL
Well, I just had my oil changed at the dealership today preparing for the Rally. The bill was only $225. It's usually been $300. I was in a hurry cause it looked like rain and I didn't want to ask a dumb question that might have cost me more money. This happen to anyone else lately?