Mobil 1 High Mileage burn-off test

[FastSUV]

I got my '98 Jeep 5.9L with 65k on the ticker back in '01...It had 4k conventional changes from the previous owner. I immediately switched it to M1 silver cap 10w30 on my 1st OC. Since that time, it has always used 3/4 - 1qt of oil every 3k. It has some seepage, but no "significant" leaks. Because I was paranoid, I did 3k OCI with M1 all its life until 150k.

At 150k, I began using Mobil 1 High Mileage 10w30 and bumped up to 4k OCI for the next few OC's. I retired the beast as a daily driver a year ago and since that time I had not put many miles on it. So I swithced to just one OC per year and reset the OC reminder back to 3k. since I will probably not even drive it that far in a typical year. It has 180k on the ticker now.

But recently, I had to drive it a lot while I fixed my other vehicle. I have put 1600 miles on it since the last OC w/ Mobil 1 High Mileage 10w30 and upon checking the oil yesterday, I discovered like clock work, it has used just about half a QT of oil. That tells me that it is on track to use about 1qt every 3k just like it always has regardless of the fact I am using Mobil 1 High Mileage in the crank case now. I went ahead & topped it off with no worries, but I have 2 points here.

One being that the motor is not messed up because it has ALWAYS used the same amount of oil since I got it.

Two being that I was under the impression that Mobil 1 High Mileage "might" burn-off at a slower rate than regular silver cap M1 does. What I have learned is that they seem to burn-off at the same rate...

Many folks online have always reported excessive burn-off with Mobil 1 as opposed to other brands/types of oil in an otherwise healthy motor. I never took the time to compare the HM formula, but now that I have had the chance to see it for sure, my next test will be to try a HM conventional oil and see if it yields the same results.

 

[Colt45ws]

Might not make much of a difference either way. Your engine just likes it some oil.

 

[ericthepig]

IMHO - your consumption has nothing to do with burn-off. BITOG is littered with posts of guys running brand X dino, and even running long OCIs - and the oil doesn't move off the full mark. Most all dinos are running in the 12-15% NOACK - so it just doesn't look like consumption due to "burn-off" is really a factor w/ oils. However, you may have some ventilation variable going on with your engine that might bring this into play.

I think the reason to watch NOACK is just in the context of PCV deposits over multi-years of use - but I don't think high NOACK is dropping your oil level.

BTW - as I wrote recently - I chged the PCV on my Sienna for the first time at 160k. That included 80k miles on M1. The PCV has a bit of moist deposits on the tip - but otherwise whistled free.

 

[FastSUV]

Well I replace my PCV valve once per year regardless of its condition so I am ontop of that.

 

[ericthepig]

Agree with Onmo. Also, seepage can be more consuming than they seem - they can get burned off the underside about as quick as they seep - so it doesn't look as bad as it is.

 

[sako]

I noticed in a high mileage vehicle I own, more burn of with Mobil 1 10w30 HM, then with Mobil 1 Extended Performance 10w30 in the same car.

 

[FastSUV]

Originally Posted By: sako
I noticed in a high mileage vehicle I own, more burn of with Mobil 1 10w30 HM, then with Mobil 1 Extended Performance 10w30 in the same car.


Good thanks for sharing! It was my understanding that the M1-HM formula had a thicker base as compared to regular M1...That should reduce consumption, but it has not for both of us.

I am thinking of trying Castrol GTX 10w30 HM formula because it is supposed to have a thicker base than competitive conventional oils. I am betting that it is thicker than Mobil 1 High Mileage formula too!

Not quite sure how I feel about Maxlife. I like the idea that it is a blend, but in my other 4.0 Jeep, the Pennzoil High Mileage seemed to run smoother & quieter than the current fill of Maxlife so not sure I want to use it in the 5.9L???

One thing is for sure, I need to at least try another kind/brand of oil in the 5.9L motor to see if it burns less than the flavors of M1 I have tried thus far.

 

[buster]

Originally Posted By: ericthepig
IMHO - your consumption has nothing to do with burn-off. BITOG is littered with posts of guys running brand X dino, and even running long OCIs - and the oil doesn't move off the full mark. Most all dinos are running in the 12-15% NOACK - so it just doesn't look like consumption due to "burn-off" is really a factor w/ oils. However, you may have some ventilation variable going on with your engine that might bring this into play.

I think the reason to watch NOACK is just in the context of PCV deposits over multi-years of use - but I don't think high NOACK is dropping your oil level.

BTW - as I wrote recently - I chged the PCV on my Sienna for the first time at 160k. That included 80k miles on M1. The PCV has a bit of moist deposits on the tip - but otherwise whistled free.


Exactly.

 

[chevrofreak]

My car consumes the Mobil 1 10w30 High mileage at the same rate that it consumed Pennzoil Platinum 5W-20. I'm trying Valvoline Maxlife synthetic 10w30 next.