Better gas mileage with Mobil Super

[fdcg27]

You need to compare like with like over entire OCIs.
Temperatures and vehicle use make a significant difference in fuel consumption.
If you track fuel use with each and every tank, and are very careful to really fill the tank at each fueling, you can do this.
If not, you can't.
I can tell you that no oil I've ever used in more than thirty years of carefully logging fuel use in a variety of cars ever gave an increment of 2-3 mpg.
Maybe I'm wrong, and Mobil Super really can do this.
Were that the case, though, XOM would certainly know it, and would be selling the oil as something like AFE+, and it would be $8.00+/qt.

 

[Garak]

You know, now that I thing about it, maybe we're onto something here. We've all heard for years and years about engines being better on mileage after a fresh oil change/change of brands/change to synthetic. Over the years, a lot of people have grown accustomed to doing a spring OCI, particularly those who were maintaining vehicles in the days that it was required.

How many of these "miracles" are related to the switch to summer gas or diesel as the case may be? That's even ignoring factors like tires plowing through snow and slush, excessive idling, and so forth.

 

[Capa]

I do a yearly OCI and so the fluctuations in MPG would have nothing to do with winter fuel, etc. Of course, what a lot of people forget is that in the spring, summer and fall many of us take a big hit in MPG with the AC on in our vehicles

Yes, I had my AC running yesterday!

 

[chevrofreak]

You are by far not the first person to say this with regards to Mobil Super oils. I've also heard similar about Kendall GT-1, and Castrol Edge FST. What does all of these oils have in common? Titanium.

 

[SS1970chrysler]

My car actually gives it's best mileage on a given oil after about 1200 miles. Current fill is MS5k 10w-30.

 

[Garak]

Originally Posted By: Capa
Of course, what a lot of people forget is that in the spring, summer and fall many of us take a big hit in MPG with the AC on in our vehicles

Yes, I had my AC running yesterday!


There you go, there are always variables.

I pay attention to my fuel mileage, but not to compare so much one oil to another. I just want to ensure nothing has gone drastically wrong. If one changes viscosities, there's a variable; throw the A/C on, another variable; snow filled roads, there's another.

I took a trip to Saskatoon once in my Town Car a few years back. I got 18 mpg (Imperial) on the way there, in a giant headwind. I had to return back the same day, and had a giant tailwind all the way. At the same speed, on the same highway, with the same oil, I got around 40 mpg on the way home. A 50 mph wind is a big variable.

 

[Capa]

Lol, [censored], I wish my minivan would get a tailwind like that often.

 

[JavierG]

I just switched to Mobil Super 5k and my mpg dropped by 2-3. What the *#@!!?

 

[ARB1977]

I just washed and waxed my truck, should see a few more mpg.

 

[Klutch9]

I'm willing to bet that most of this MPG increase is from the summer blend gas. In my Focus I just took a 300+ mile highway trip and was somewhat unhappy with my 31 MPG average during that drive. Now that I'm back to my normal local roads driving routine to/from work, my MPG is still hovering around 30 MPG this tank (27ish mpg is normal for me in the winter). I think sometime in the past 2 weeks with the big warmup we had, the stations switched to summer blend, and now my gas mileage has gone up slightly.

 

[Coprolite]

Originally Posted By: Klutch9
I'm willing to bet that most of this MPG increase is from the summer blend gas. In my Focus I just took a 300+ mile highway trip and was somewhat unhappy with my 31 MPG average during that drive. Now that I'm back to my normal local roads driving routine to/from work, my MPG is still hovering around 30 MPG this tank (27ish mpg is normal for me in the winter). I think sometime in the past 2 weeks with the big warmup we had, the stations switched to summer blend, and now my gas mileage has gone up slightly.


The switch between winter/summer fuel is not a trivial process and is usually scheduled in advance in conjunction with maintenance. It can be compared to the time it takes to retool an assembly line from one year of a car to the next.

That being said, it is still possible that the switch has been made in your area.

 

[zerosoma]

Today ... I got 88 MPG!!!!

This is unbelievable!



Actually I'm kidding haha.

I will have to do a real test to see if it actually improved my mpg. But my needle didn't move nearly as much as it does when I take these trips to Watertown and back. I had just changed the oil a week prior and I didn't put any new gas in. I've been unemployed for a week so the gas that was in there had been in there for two weeks or more.

I figured it had to be the oil. I make the trips to Watertown and back frequently enough to know what my vehicle does with fuel and the gas gauge. It was a wonderful thing to see!

 

[ahoier]

When you say "big hit with A/C running" - I don't know what takes a bigger hit, A/C or Ethanol laced fuels?

But granted, the A/C is likely the only "constant" or "consistent" variable As ethanol amounts can range from fill up to fill up, and/or pump to pump.....I know here in FL, they all have stickers stating "All Grades of Fuel contain UP TO 10% ethanol"

So one station "could" theoretically max out their ethanol tax credit, at 10%, perhaps even 11% (thinking, oh who would notice the extra little bit of corn...lol), where another station could be around 8%...


But yes, we've all heard the remarks of better MPG directly after an oil change, or after an air/fuel filter replacement, etc.....but [censored], even the EPA took back their claims of "better MPG" if you change your air filter......seems they did more testing on it, and the air filter really doesn't affect MPG, moreso, your horsepower though...

But still a good reason to replace it

 

[tommygunn]

Originally Posted By: chevrofreak
You are by far not the first person to say this with regards to Mobil Super oils. I've also heard similar about Kendall GT-1, and Castrol Edge FST. What does all of these oils have in common? Titanium.


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