EcoBoost Ranger Official Certified Engine Oils

[YukonRanger]

Official links to Latest Ford EcoBoost Oil Spec Sheets

Ford Service - Engine Oil Capacity and Specification - 3.0 ECOBOOST™
Ford Service - Engine Oil Capacity and Specification - 2.7 ECOBOOST™
Ford Service - Engine Oil Capacity and Specification - 2.3 ECOBOOST™

All North American rangers require oil certified with WSS-M2C96 or Ford's newer WSS-M2C97 Oil specification for engine durability and efficiency requirements.

• Extreme Pressure Mist Oil safe
• Reduced LSPI (low speed pre-ignition)
• WSS-M2C97 certified oils are backwards compatible with WSS-M2C96

All Ranger EcoBoost engines require the same Viscosity Grades:

• 5W-30 or 0W-30 recommended for cold climates -22.0 °F (-30 °C) or colder

All Ranger EcoBoost engines are compatible with the following oil specs:

• Ford WSS-M2C971-A1, WSS-M2C961-A1
• Ford WSS-M2C973-A1, WSS-M2C963-A1 in Cold Climates -22.0 °F (-30 °C)

Ford M2C97 vs ILSAC GF-7

Ford's WSS-M2C97 is the latest Ford oil specification carrying additional criteria to meet and exceed the requirements of the ILSAC GF-7 industry standard. All ranger EcoBoost motors were originally certified for use with GF-6A oils, but benefit from GF-7A through better cold cranking viscosity and LSPI improvement.

Unlocking Performance: Inside the ILSAC GF-7 Specification | Afton Chemical

Risk of Non-Spec oil

Use of a non certified oil in Ecoboost engines with a belt in oil drive (BIO) on the oil pump can chemically break down the belt over time with particles clogging oil distribution and leading to the infamous "ecoboom" catastrophic failure from oil starvation.

Will it happen over night? Not likely.

However, the latest WSS-M2C97 oils give better cold start cranking ability, slightly better fuel mileage plus keep your warranty intact.

Oils Meeting Ford Specification

Ford WSS-M2C971-A1

• Motorcraft SAE 5W-30 Synthetic Blend Motor Oil — Latest variant meets WSS-M2C971-A1.
• Motorcraft SAE 5W-30 Full Synthetic Motor Oil - Premium option
• Mobil 1 High Mileage 5W-30 - Specs list WSS-M2C971-A1
• Valvoline MaxLife High Mileage 5W-30 - synthetic blend; meets WSS-M2C971-A1
• DuraMAX XLT Advanced Synthetic 5W-30 -meets Ford WSS-M2C971-A1 explicitly
• Kendall GT-1 MAX 5W-30 - full synthetic with LiquiTek; meets Ford WSS-M2C971-A1
• Phillips 66 Shield - Shield Choice or Valor synthetic blend/full; meet WSS-M2C971-A1
• Pennzoil Platinum SAE 5W-30 Full Synthetic - certified WSS-M2C971-A1 in PDS
• Pennzoil Ultra Platinum SAE 5W-30 Full Synthetic -Premium Option WSS-M2C971-A1

Ford WSS-M2C961-A1

• Mobil 1 5W-30 (Full Synthetic variants) — Explicitly lists Ford WSS-M2C961-A1 approval
• Mobil 1 Extended Performance 5W-30 — Meets WSS-M2C961-A1; popular for long intervals
• Valvoline Advanced Full Synthetic SAE 5W-30 — Frequently cited on Bronco6G
• Castrol GTX Full Synthetic 5W-30 — Listed as meeting WSS-M2C961-A1 in multiple guides
• Amsoil Signature Series 5W-30 - Lists OK for WSS-M2C961-A1, M2C971 coming April 2026

Ford WSS-M2C973-A1 - For Cold Climates -22.0 °F (-30 °C) or below

• Mobil 1 Advanced Fuel Economy 0W-30 - Explicitly lists Ford WSS-M2C973-A1 approval
• Service Pro Premium Full Synthetic 0W-30 - Lists Ford WSS-M2C973-A1 in the PDS
• Petro-Canada Supreme SHP 0W-30 - Tech Datasheet lists Ford WSS-M2C973-A1
• Sunoco Ultra Full Synthetic 0W-30 - Meets Ford WSS-M2C973-A1

Ford WSS-M2C963-A1 - For Cold Climates -22.0 °F (-30 °C) or below

• Havoline ProDS variants— Chevron/Havoline guides and PDS list compatibility
• Super S SuperSyn Full Synthetic 0W-30 — Some technical sheets list compatibility
• Amsoil Signature Series 0W-30 - Meets Ford WSS-M2C963-A1

Oil Change Intervals

Ford Service says an oil change is required on:

• oil service indicator warning OR
• one year OR
• 10,000 miles.

My personal advice is to change your oil every 3000 miles or 5000 km, don't wait for the oil interval warning. Many will argue but I am biased on the side of aggressive oil changes as I live in an arctic climate, and I base my judgement purely on ease of cold weather starting. After a fresh oil change all my engines crank over easier in the extreme cold, period.

Yukon Cold Weather Experience

Oil Catch Can

I run a UPR dual Oil catch can, something else you need to watch in winter months is to empty it out as it collects moisture and fills up quite rapidly. In the summer it will collect dark oil sludge and probably only needs to be emptied once all season. However, in winter months it will fill up with what looks like chocolate milk. I empty it at least once every 1000 Miles 1600km in winter and it will usually be about half full.

Cold Weather Starting

I have personally use Mobil-1 0W-30 Advanced Fuel economy since 2007 on multiple vehicles and it has been flawless. A cold starting champion, it also regularly goes on sale here in Canada for half price. Best of all worlds. Mobil-1 Full synthetic is the only oil I will run in any of my vehicles now.

My '25 Raptor remote starting in -52 °C (-63°F) Dec. 24th, 2025.

Credit to 1996-to-2025, Lion77, purdyd, stemplar for newest info and corrections to my original post.

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[superj]

good post. some people have not noticed the specific ford number requirement when looking at oils, i bet.

 

[1996-to-2025]

I believe WSS-M2C971-A1 is the newer, updated specification that replaces WSS-M2C961-A1 for most Ford vehicles requiring 5W-30 oil. The new spec is backwards compatible.
https://www.fcsdchemicalsandlubricants.com/quickref/oilchartUS.pdf.

FWIW, here's a comprehensive list of approved oils from the Bronco 6G forum:

 

[mos]

Thanks for that ,
just clarification . The oil change intervals are your in put and not official ford info ?

 

[purdyd]

Thanks for that ,
just clarification . The oil change intervals are your in put and not official ford info ?

fords service interval is 10k

i haven’t seen anything to suggest 5k is more than sufficient for any of the oils on the list

that’s looking at oil analysis reports ranger owners have graciously shared.

I notice in the new 2026 ford ranger manual.

WSS-M2C971-A1 is now listed as the oil spec

i do not think motorcraft Synthetic blend meets WSS-M2C971-A1 or the 961 specs?

even though it is listed as a suitable oil

 

[YukonRanger]

Thank you sir, this is the latest info so I will update the original post to reflect this

I believe WSS-M2C971-A1 is the newer, updated specification that replaces WSS-M2C961-A1

 

[purdyd]

Yes, this my personal recommendation and I don't think anyone who follows it will regret doing so.

As mentioned, Ford service interval is 10,000 km.

the actual maximum service interval is 10k miles

although supposedly the oil life is monitored

 

[stemplar]

Yes, this my personal recommendation and I don't think anyone who follows it will regret doing so.

As mentioned, Ford service interval is 10,000 km.

No, it's not 10k km, it's whichever comes first: oil service indicator OR one year OR 10,000 miles. I had a recent analysis of oil with about roughly 3,000 miles on it and the oil was still rather serviceable (TBN still over 5). Sure, the engine won't mind super frequent changes, but the reality is you're wasting money with no measurable or observable benefit.

Also, the timing belts are not rubber, and they don't exist in our trucks. If I'm not mistaken, all three engines have timing chains. However, the belt-in-oil (BIO) is for the oil pump, at least on the 2.7; not sure if there's a BIO in the 2.3 or 3.0. That belt in the 2.7 also isn't rubber; it's a composite designed to live submerged in oil, but it's extremely important to use an oil with the proper spec, because part of that spec assures compatibility with the oil and it's additives with the BIO's.

 

[iBrad81]

Amsoil Signature series meets Ford WSS-M2C961-A1

https://amsoilcontent.com/ams/lit/databulletins/g2880.pdf

 

[CACTUSGREYFX4]

I did 5W20 in mine for first oil change, it meet the specs. It was cold here in Canada this year.

 

[purdyd]

I did 5W20 in mine for first oil change, it meet the specs. It was cold here in Canada this year.

I would do 0w-30 if it is cold, like the manual recommends

 

[Satex]

the actual maximum service interval is 10k miles

although supposedly the oil life is monitored

I don't claim to know all the factors used by the vehicle's oil life monitor, but I can confirm that your actual use is factored.

I have about 11,000 miles on my truck. I did a break in change at 1,000 miles and didn't look at the oil life indicator. At almost exactly 5000 miles (4000 on that oil,) I changed it again and the oil life was at 65%.

At 10k I had it changed, and the oil was at 90% (or 10% left.)

The last oil got "used up" significantly faster. I have a 3500 pound camper, and that 5000 miles was about 40% towing. The previous oil change with 4000 miles included about 25% towing.

So, I'm not certain about other factors, but the load from towing did result in the oil life monitor indicating greater depletion of oil life.

 

[Lion77]

Just a note, the latest batches of MC 5W-30 are now GF-7A spec, I just did an oil change about a month ago, ordered MC FS and OE filter from Rock Auto and the bottles now list GF-7A spec. GF-7A spec has 33% better cold cranking viscosity vs GF-6 spec., better LSPI resistance, improved timing chain wear and a few other tweaks.

Most of the oils listed above likely already are GF-7A spec by now unless you're getting the last of old stock. I know MC and Valvoline's stuff is already out for GF-7A.

But yah, UOA's are really the best way to verify, the OLI (Oil Life Indicator) on the car is pretty good, it gets you close to the maximum usable life, but based on UOA's I've seen, it's a bit aggressive on pushing the life.

I completely forgot to take my sample on the RR last oil change, but on my truck, I have 25% remaining oil life at 9k miles on the oil, most of my use on that oil change was highway cruising at steady state, so about as easy of miles as you can get, but I did have 1 full day at an OHV park on that oil change and plenty of random WOT pulls on back roads, other than that, almost no short trips and mostly crusing.

I'll get a sample on the next change see where the oils condition comes in at with 25% reserve on the OIL which is where I've been changing at until I get confirmation with UOA.

 

[Lion77]

GF-6 was a BIG deal back in 2020 especially for TDI engines, not so much for NA engines where the previous GF-5 spec was tailored towards. That may be one reason why Ford had some issues with earlier generations of Ecoboost V6 engines, particularly the gen 1's had timing chain wear issues along with some cam phasor issues.

Valvoline™ is GF-7 ready - Valvoline™ Global

GF-7A is more of a "refinement" on GF-6 rather than a massive jump, but it is an improvement none-the-less, I think the cold cranking viscosity improvement and LSPI improvement are probably the most notable real-world advantages. GF-6 does pretty good with timing chain wear over GF-5, so it's only slightly better in that area.

Unlocking Performance: Inside the ILSAC GF-7 Specification | Afton Chemical

The new GF-7A addresses LSPI on aged oils where the older GF-6 was only on fresh oils, so that's a big improvement along with the substantial reduction in cold cranking viscosity.

 

[CACTUSGREYFX4]

I would do 0w-30 if it is cold, like the manual recommends

I had some left over from my previous truck why throw it out. Next one I will go 5W30.

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