Big improvement after first oil change?

[WT205]

Anyone else feel an improvement in their 2.7 after the first oil change? Mine seems to be running smoother and MPG seems to be up slightly… Could be a placebo effect.

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[HighVelocity]

Numbers don't lie.

 

[CarbonSteel]

Placebo. I changed mine at 1K and again at 2K to get the wear metals out. No difference in power or MPG.

 

[Spiniker]

Anyone else feel an improvement in their 2.7 after the first oil change? Mine seems to be running smoother and MPG seems to be up slightly… Could be a placebo effect.

I have a 21 bronco with 2.7 and i saw a jump in mpg after changing my oil at 1500 miles. Went from 17 mpg to 20. And now in november when in the 40s im at 22 mpg. At 55 devrees and above i can get as much as 24 mpg. I use royal purple full synthetic.

 

[Rydfree]

I changed mine at 1500miles and my MPG went down.
Could be that I wasn't worried about how hard I pressed the fun pedal after that though

 

[JR23]

Just based on the dash tracking, my mileage did move up after a 1500 mile oil change on a 2.7. Following that adding FI exhaust, mod bumper, and pedal monster plus more aggressive driving quickly reversed any gains and I settled around 19mpg on premium.

 

[patientB]

It’s a documented fact that the smell of fresh motor oil relaxes the body, loosening tight quadriceps muscles, and resulting in a lighter touch on the accelerator pedal, with subsequent improvement in MPG.

 

[Ike89]

I screwed up and changed mine at 6k. I've also been meaning to send in my oil to get it tested. My mpg is 18-19 constant.

 

[userdude]

If you're Canadian (eh?), you got maple syrup instead of engine oil, so yeah, I could see that.

 

[MayhemMike]

Imagine how it will be after you change out the air in all your tires. That factory air is always of a lower grade.

 

[WT205]

So it’s not just me…

 

[1st 75th ranger]

I have a 21 bronco with 2.7 and i saw a jump in mpg after changing my oil at 1500 miles. Went from 17 mpg to 20. And now in november when in the 40s im at 22 mpg. At 55 devrees and above i can get as much as 24 mpg. I use royal purple full synthetic.

i was at 16 mpg 1st oil change 18 knn full air intake and full borla exhaust dropped to 14 lol as novelty wore off lol now 21/22 all the time in normal 4a

 

[CarbonSteel]

So it’s not just me…

While the friction may be reduced somewhat due to break-in which **may** lead to an MPG improvement there is NO oil on the planet that is going to increase MPG more than a few tenths AT BEST.

Always hilarious to see claims of 3 or 4 MPG improvements based upon an oil change when the only thing that **COULD BE** different is a slight move up or down with viscosity with a given range for a given viscosity between brands.

In this case, for 5W-30, the range is 9.3 to 12.5 cSt @ 100°C and there is not enough viscosity change within that range to enable any substantial increase in MPG.

Last, but not least, there are no "controls" to maintain consistency for testing MPG within oil brands while driving--your right foot, a headwind, increased loading, and a hundred other variables exist that prevent a valid test.

 

[FIREGROUNDIMAGES]

I have a 21 bronco with 2.7 and i saw a jump in mpg after changing my oil at 1500 miles. Went from 17 mpg to 20. And now in november when in the 40s im at 22 mpg. At 55 devrees and above i can get as much as 24 mpg. I use royal purple full synthetic.

What size tires are you running?

 

[Spiniker]

What size tires are you running?

Factory 32s, general grabber atx. I have a black diamond and a 2 door.

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