Anyone bump up their oil weight from 5w-30 to 10w-30 after about 5000 miles .

[STX6G]

After reading a lot of things with all these manufacturers be forced to run lighter weight oils just for better fuel economy . I was thinking that after 5,000 miles a 10w-30 oil might actually be a better oil for engine longevity.
So are there any of you doing this yet , or am I going to be the first .

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[1996-to-2025]

10w-30 is just going to give you a higher viscosity at cold temps, both will reach the same viscosity at running temp. If you live in a cold climate, increasing the winter weight could be detrimental.

 

[ryanO]

After reading a lot of things with all these manufacturers be forced to run lighter weight oils just for better fuel economy . I was thinking that after 5,000 miles a 10w-30 oil might actually be a better oil for engine longevity.
So are there any of you doing this yet , or am I going to be the first .

No way in hell you should do that. The engines and its components are designed for a specific weight oil.

 

[Grand Nat]

If you want to use 10-30 wait until the warmer weather when the temperature is over 75 degrees. It would be beneficial if you're running your Ranger hard on a beach or off road where you would generate a lot of heat. Other wise 5-30 is fine for normal use. A 5-30 will break down faster in high stress situations then a 10-30 due to viscosity Index Improver additives in the 5-30 that gives it's the winter rating of 5W. The 5W-30 is the recommended oil for that engine for most peoples driving habits and temperature fluctuations across United States. I would recommend Fords synthetic blend oils with the new API SQ ratings design and blended for Direct and dual ejection turbocharged engines.

 

[stuartmunto]

Wouldn’t 5w-40 be a heavier/thicker oil?

10w-30 is the same viscosity as 5w-30 when up at operating temps

 

[purdyd]

At least it isn’t 0w-16, like on my wife’s rav4 hybrid

5w-30 seems almost old school these days.

 

[AugPal]

In the summer, I wouldn't be afraid to run straight 30w

 

[superj]

my v8 powered 2017 nissan ran 0w20 in it. talk about nerve wracking when you are used to 5/10w30 in an engine

 

[BriSco]

After reading a lot of things with all these manufacturers be forced to run lighter weight oils just for better fuel economy . I was thinking that after 5,000 miles a 10w-30 oil might actually be a better oil for engine longevity.
So are there any of you doing this yet , or am I going to be the first .

You can be the first. I'm not arrogant enough to think I'm smarter than the engineers who designed the motor. Clearances and such are designed to run with a specific oil viscosity. The manufacturers have a Corporate Average Fuel Economy number they have to meet. They design for that. I doubt that forcing thicker oil into tighter clearances is going to help your motor much.

Some Toyotas use 0W-8 oil and they last just fine. Why? They are designed like that by engineers much smarter than I am.

You do you.

 

[MasterCylinder]

After reading a lot of things with all these manufacturers be forced to run lighter weight oils just for better fuel economy . I was thinking that after 5,000 miles a 10w-30 oil might actually be a better oil for engine longevity.
So are there any of you doing this yet , or am I going to be the first .

The 10W/30 is not listed to be within the factory guidelines for recommended oil for 2.3l, 2.7l or the 3.0l. 5W/30 and 0W/30 are the recommendations. A quick way to understand oil ratings is this. The first number is the Winter, cold rating thus the W and protects the engine on cold starts. The second number is for running temperature and load protection. As others have mentioned if you live where the climate is cooler or colder the 0W/30 is the direction to go, not 10W. Ranger On!

 

[Grand Nat]

Wouldn’t 5w-40 be a heavier/thicker oil?

10w-30 is the same viscosity as 5w-30 when up at operating temps

5-40 would would have a higher viscosity. Meaning thicker oil better suited for higher operating temperatures and higher ambient temperatures.

 

[josephp732]

Ford specifies 5w-30 for our EcoBoost engines for a reason.

You’ve got a smaller-displacement, turbo engines with tight bearing clearances, high cylinder pressures, and very high localized heat in the turbo center sections. The oil has to do a lot:

• Provide fast flow at cold start
• Maintain stable film strength at operating temp
• Resist shear under turbo load
• Protect timing components and the wet oil pump belt (if equipped)
• Still meet fuel economy targets

5W-30 hits that balance.

The “5W” ensures quick flow and fast pressure on startup. The “30” side is thick enough at temperature to maintain a proper hydrodynamic film on rod/main bearings and the turbo shaft without being so thick that it hurts efficiency or oil flow through tight passages.

Ford’s oil spec (WSS-M2C946-B1 / WSS-M2C961-A1 depending on calibration) is built around 5W-30. Oil pump output, pressure targets, VCT performance, and the oil life monitor strategy are all designed assuming that viscosity.

Could you run something else? Maybe in edge cases (extreme cold or heavy track use). But for normal street driving, towing within spec, and long-term durability, 5W-30 is the sweet spot the engine was validated on.

Bottom line: it’s not about “thicker is better” or “thinner for MPG.” It’s about running the viscosity the engine’s clearances, pump design, and turbo system were engineered around.

 

[ChronciallyChronic]

After reading a lot of things with all these manufacturers be forced to run lighter weight oils just for better fuel economy . I was thinking that after 5,000 miles a 10w-30 oil might actually be a better oil for engine longevity.
So are there any of you doing this yet , or am I going to be the first .

Give it a try however keep in mind, if you have engine issues develop at any point in the truck's warranty life and Ford checks the oil and sees it is out of spec, will will have also voided the warranty. Unless you do the changes yourself, Ford can run your VIN through a certain database auto repair shops report and see the grade of oil used.

In short, if you want to maintain your powertrain warranty, don't do it.

 

[CoastieN70]

The difference between 5W-30 and 10W-30 is negligible as far as gas milage goes. On cold start up the oil is more viscus and your engine will work slightly, and I do mean slightly, harder, but unless you are in sub-arctic conditions it won't matter.
10W-40 would achieve your desired outcome but your gas milage will decrease slightly.
The most import component of modern oils is their wear additives, and these are what engine manufactures use for their specification recommendations.
So as long as the oil meets those specifications you should be good to go.

 

[YukonRanger]

Never increase the cold temp weight (first number) you are asking for trouble

eg

if 10W-30 is spec

0W-30 is safe
5W-30 is safe
15W-30 is going to cause premature wear.
only gets worse from there.

Will it be catastrophic? Probably not. But most engine wear occurs on cold temp startup, so treat your baby nice: High quality synthetic, and if in a cold climate switch to a lower winter weight for easier startups.

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