Brule's LubroMoly MoS2 mpg experiment results

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Brule

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A couple of months ago Clevy and I started tracking our mpg before and after adding MoS2. I finally have finished my runs.

To keep my results as scientifically consistent and accurate I used new Pennzoil Ultra 10w30 and a new OEM Honda oil filter at the start of both the baseline and MoS2 runs.
Additionally I filled up each time at the same QT gas station and the same Pump 11 with 87 Octane gasoline.

Additional measures taken to eliminate error:
Tire pressures checked/adjusted at each fill-up
Air conditioning/defrost not used
No tire rotation or air filter changing
No other maintenance done such as spark plugs or timing belt
Any abnormal driving [short trips or long highway runs] were done on my other vehicle.


Html:


Baseline Runs:



Run Miles Gallons Date MPG AVG MPG Tot miles Tot Gallons

1 369.4 12.303 8/4/2013 30.03 30.03 369.4 12.303

2 381.5 12.386 8/9/2013 30.80 30.41 750.9 24.689

3 368.3 12.459 8/15/2013 29.56 30.13 1119.2 37.148

4 363.6 12.032 8/19/2013 30.22 30.15 1482.8 49.180

5 357.3 11.936 8/24/2013 29.93 30.11 1840.1 61.116

6 351.4 11.675 9/7/2013 30.10 30.11 2191.5 72.791



MoS2 Additive Runs:

[Runs 7 & 8 with a total of 613.4 miles for MoS2 "plating" are not included in the results.]



9 370.7 11.931 9/23/2013 31.07 31.07 370.7 11.931

10 374.8 12.182 9/29/2013 30.77 30.92 745.5 24.113

11 379.3 12.484 10/3/2013 30.38 30.73 1124.8 36.597

12 371.9 12.481 10/9/2013 29.90 30.50 1496.7 49.078

13 361.3 11.981 10/14/2013 30.16 30.43 1858.0 61.059

14 374.2 12.422 10/19/2013 30.12 30.38 2232.2 73.481


There was not much of an improvement...30.11 mpg up to 30.38 mpg. Less than 1% improvement. I am confident my local/highway driving was pretty consistent, but I know there are two variables that could have affected the results.

1.) Air Filter should have been changed at the beginning of both sets of runs.
2.) The MoS2 set of runs experienced somewhat cooler outside temperatures than the baseline's. It was because of further cooler temps that I did not do more runs for each. I shouldn't have started the experiment so close to the end of summer.
 
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Originally Posted By: Brule

I shouldn't have started the experiment so close to the end of summer.


Exactly.
 
I think what you observed is probably right. I don't think the mos2 will create outstanding improvements for the most part, because unless the engine is toast, any compression increases can only be incrementally higher, and the circumstances where boundary lubrication is applied and marginally improved should also be only very few and far between.

I think you saw right. Nothing wrong with that result.

I'd love to see to back to back one year OCIs without and with mos2.
 
Thanks for sharing your results. I agree with another responder that MoS2 may not dramatically improve your mileage. But, even a genuine 1% increase is nice (but very hard to measure in a single vehicle test).

Prior to adding MoS2, did you need to add oil between oil changes? Has that situation continued, improved, gotten worse?
 
Originally Posted By: dave5358

Prior to adding MoS2, did you need to add oil between oil changes? Has that situation continued, improved, gotten worse?


Good question. Ive long hypothetized that this may be a beneficial aspect of the product.
 
Originally Posted By: chubbs1
Thank you for your effort in this experiment.


+1

So. ARE we saying that Mos2 can improve compression?
 
Originally Posted By: dave5358
Thanks for sharing your results. I agree with another responder that MoS2 may not dramatically improve your mileage. But, even a genuine 1% increase is nice (but very hard to measure in a single vehicle test).

Prior to adding MoS2, did you need to add oil between oil changes? Has that situation continued, improved, gotten worse?


Yes, the civic consumes oil pretty bad. Before changing to PU it was using .75-.80 quarts per 1000 miles. On the baseline run that went up to just over 1 quart/1000. On the MoS2 run it was just under 1 quart/1000. Slightly better, but not clearly better using MoS2.
 
Originally Posted By: Brule
Originally Posted By: dave5358
Thanks for sharing your results. I agree with another responder that MoS2 may not dramatically improve your mileage. But, even a genuine 1% increase is nice (but very hard to measure in a single vehicle test).

Prior to adding MoS2, did you need to add oil between oil changes? Has that situation continued, improved, gotten worse?


Yes, the civic consumes oil pretty bad. Before changing to PU it was using .75-.80 quarts per 1000 miles. On the baseline run that went up to just over 1 quart/1000. On the MoS2 run it was just under 1 quart/1000. Slightly better, but not clearly better using MoS2.


If you can tell, is the oil usage past the rings? That is, it's not dripping on the ground or leaking out a bad engine seal or something like that. Does it puff smoke on morning start-up (possibly leaking down the valve stems)?

This should be an area of improvement, but it may take some time - 500+ miles.
 
Originally Posted By: dave5358

If you can tell, is the oil usage past the rings? That is, it's not dripping on the ground or leaking out a bad engine seal or something like that. Does it puff smoke on morning start-up (possibly leaking down the valve stems)?

This should be an area of improvement, but it may take some time - 500+ miles.


No drops at all. I garage it and have cardboard beneath the engine. It's clean. Exhaust pipe exit is very carbon-ed up...black. So it's getting past the rings. When I used 5w20 I could see smoke in the mirror with a high rpm WOT. It doesn't smoke with this 10w30 PU, however. I know this car is on borrowed time. I'm ready to get another car, but it's nice not having payments, depreciation and good mpg with what I have.
 
Brule, thanks for your efforts.

I did see a pretty significant fuel economy improvement that continues today. The change occurred with only the use of MoS2 and nothing else. No gas changes, tire or tire pressure changes, or alternations to the aerodynamics. Yet, I continue to see at least a 5% improvement in steady state highway fuel economy, and a slightly lower increase in city fuel economy, despite much lower temps.

I think I'm over 3000 miles since the addition of MoS2, and engine smoothness has seemed to continue, albeit at a slower rate. For a mid-1990's technology motor, it revs very smoothly and evenly and is also very quiet now at idle. Both of these are significantly improved from before MoS2.

The engine was a slight oil burner before, and despite being driven harder in general (I guess I'm enjoying the smoothness more), oil burning has seemingly decreased by a rough guestimate of 25% or so.

Compression numbers were slightly uneven before MoS2, and readings taken well into MoS2 usage showed that the lower cylinders had come up and the numbers were roughly equal now across all four, though the worse cylinders only recorded a 3-5% increase.

So, my experiences have been significantly positive, with consistent improvements to highway fuel economy that can't be explained by other changes as none were made that would affect that.
 
Originally Posted By: Injured_Again
Brule, thanks for your efforts.

I did see a pretty significant fuel economy improvement that continues today. The change occurred with only the use of MoS2 and nothing else. No gas changes, tire or tire pressure changes, or alternations to the aerodynamics. Yet, I continue to see at least a 5% improvement in steady state highway fuel economy, and a slightly lower increase in city fuel economy, despite much lower temps.


Glad to do it. I've been saying my driving is 50/50 city/highway, but it probably leans more towards city. You and Clevy have both mentioned how highway mileage gave the bigger increase and this may be another reason my results weren't as significant.
 
Originally Posted By: Brule
Originally Posted By: Injured_Again
Brule, thanks for your efforts.

I did see a pretty significant fuel economy improvement that continues today. The change occurred with only the use of MoS2 and nothing else. No gas changes, tire or tire pressure changes, or alternations to the aerodynamics. Yet, I continue to see at least a 5% improvement in steady state highway fuel economy, and a slightly lower increase in city fuel economy, despite much lower temps.


Glad to do it. I've been saying my driving is 50/50 city/highway, but it probably leans more towards city. You and Clevy have both mentioned how highway mileage gave the bigger increase and this may be another reason my results weren't as significant.


Brule, in my case there is just too much variability in city driving. I can't control for the way others drive around me, and just variability of making or not making lights and stuff, make it hard to drive consistently.

Freeday driving on the other hand, is steady state and most of my averages are two way, better cancelling the effects of wind or gradient. I also try to drive out of the slipstream of other vehicles, which I've been able to do to a large degree since I'm traveling at times when traffic is relatively sparse.

So I feel confident my fuel economy gains are real and can only seem to be attributed to the MoS2.
 
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