What's the best oil to use on a MM with 122000 miles

Lots of independent testing produces many varied results.
Mobil 1 doesn't stand up well in head to head with redline, royal purple or Amsoil.

That being said, it is still a matter of choice, based on your needs and useage.

Bottom line change your oil annually or 10-20000 miles based on your oil Mfg. recommendations (not every 3000 miles).

IMHO:

My work van/trucks, get oil changes every 20-25000 miles with what is considered "Severe" duty, towing, heavy loads,,stop and start driving including many short trips.
I have used many synthetics over millions of miles in my service trucks including Mobil 1, Castrol and Pennzoil, I have had the best results, (fuel economy, lower operating temps, etc) with Amsoil.

Me, I run Amsoil Dominator Race oil 5w20 and Amsoil eao11 filtration in my Marauder
Changed annually at about 6000 miles. Mainly highway and drag strip use.

YMMV.


http://oil-tech.com/motoroil-comparison.php

http://m.youtube.com/watch?v=L3vb1Vu03ko&desktop_uri=/watch?v=L3vb1Vu03ko

http://www.animegame.com/cars/Oil Tests.pdf
 
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122k is still low mileage for these engines if properly maintained. Good fresh oil, 5w20 or 5w30 depending on your climate and a quality filter changed every 3k to 5k is ok. Both my P71's have in excess of 300k, and we use quaker state or pensoil with motorcraft filters. cleanliness is everything, these overhead cam engines, with no replacable bearing inserts, are very sensitive to dust/dirt/sand.
 
boatmangc said:
Mobil 1 doesn't stand up well in head to head with redline, royal purple or Amsoil.
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Can you show me where it "doesn't stand up well"? The first link is an AMSOIL-sponsored test, and the last is an Australian test where they use the one-armed bandit, which has been discredited by every legitimate oil testing laboratory as irrelevant for motor oil.
Bottom line change your oil annually or 10-20000 miles based on your oil Mfg. recommendations (not every 3000 miles).
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While I agree that this mileage is certainly possible, I would strongly urge anyone attempting to go more than 10,000 mile to have a UOA (Used Oil Analysis) performed.
 
3K changes?

Short trips in below freezing weather is severe service, and calls for frequent oil changes, regardless of oil type.

===========
 
My 2 cents. I did a lot of research and found that the Shell Rotella oils have retained a high zinc level (the oils are intended for diesels). I use the synthetic T6 in all of my engines (1930 Model A, Harley 1350, 4.6 single over head cam, and Honda GL1500). I especially recommend this oil if you have a push rod valve system. The zinc protects your lifters and cam. The zinc was removed from most car oils to reduce emissions. Even thou we have roller tappets I like the extra protection.
 
boatmangc said:
Lots of independent testing produces many varied results.
Mobil 1 doesn't stand up well in head to head with redline, royal purple or Amsoil.

IMHO:

That being said, it is still a matter of choice, based on your needs and useage.

Bottom line change your oil annually or 10-20000 miles based on your oil Mfg. recommendations (not every 3000 miles).



My work van/trucks, get oil changes every 20-25000 miles with what is considered "Severe" duty, towing, heavy loads,,stop and start driving including many short trips.
I have used many synthetics over millions of miles in my service trucks including Mobil 1, Castrol and Pennzoil, I have had the best results, (fuel economy, lower operating temps, etc) with Amsoil.

Me, I run Amsoil Dominator Race oil 5w20 and Amsoil eao11 filtration in my Marauder
Changed annually at about 6000 miles. Mainly highway and drag strip use.

YMMV.


http://oil-tech.com/motoroil-comparison.php

http://m.youtube.com/watch?v=L3vb1Vu03ko&desktop_uri=/watch?v=L3vb1Vu03ko

http://www.animegame.com/cars/Oil Tests.pdf
Click to expand...

RF Overlord said:
Can you show me where it "doesn't stand up well"? The first link is an AMSOIL-sponsored test, and the last is an Australian test where they use the one-armed bandit, which has been discredited by every legitimate oil testing laboratory as irrelevant for motor oil.While I agree that this mileage is certainly possible, I would strongly urge anyone attempting to go more than 10,000 mile to have a UOA (Used Oil Analysis) performed.
Click to expand...

^^^^clarification^^^^

I have had done some oil analysis testing back in the late 80's early 90s when I 1st started trying synthetics
In my vehicles I experienced longer oil life in my trucks with Amsoil in them and had less harmful contaminates, better protective quality retention and remained in service longer than the ones I ran Mobil one in.
Not looking for an oil battle, I don't sell any of it except for marine use and then I go back and forth between RP marine and Amsoil marine oils.

But, I have had vehicles with 400k miles on them that always had minimum 25k oil changes, never leaked, smoked, knocked or died. One of those 400k trucks is still running around here. Who knows how many miles it has on it now.


I agree with the "whatever makes you feel warm and fuzzy" line.

Do some oil research on the net, make your own conclusions.



I drink Starbucks too:lol:
 
boatmangc said:
Not looking for an oil battle,
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I'm not, either, and in light of your experience, I'm not suggesting you're wrong; I was just curious about your "Mobil 1 doesn't stand up well" statement as M1 enjoys an excellent reputation on BITOG and was my original oil-of-choice when I first switched to synthetics (I have since settled on Pennzoil Platinum).

I agree that for extended OCIs AMSOIL is the king, but I also believe that for more "normal" intervals (up to 10,000 miles), any of the top-tier oils will give excellent service and that the difference between them is negligible.
 
RF Overlord said:
Why? What difference does mileage make? Royal Purple is an excellent oil, albeit a little pricey, but there's no reason to switch just because it has high mileage. BTW, what do you consider "high"? Mary's car has 177,xxx and I've run the same oil for the last 70,000 miles. Marauderjack just reached 250,000 and I think he's always used the same oil.
Click to expand...


I guess I should probably state that I dont run oil any longer than 3000 or 3500 miles therefore buying Royal Purple would be a waste of money for my situation. However, I do run Royal Purple gear oil in my differentials. With the frequency of my changes it just makes sense for me to run the Motorcraft or equivalent synthetic blend. :)

I meant higherrrrrr mileage, not high mileage. Yes, 177K is nothing these days on mileage. There is very little difference in driving my 41K mile blue and TagAlong's 177K mile black.
 
Flbatfish said:
My 2 cents. I did a lot of research and found that the Shell Rotella oils have retained a high zinc level (the oils are intended for diesels). I use the synthetic T6 in all of my engines (1930 Model A, Harley 1350, 4.6 single over head cam, and Honda GL1500). I especially recommend this oil if you have a push rod valve system. The zinc protects your lifters and cam. The zinc was removed from most car oils to reduce emissions. Even thou we have roller tappets I like the extra protection.
Click to expand...

I have heard of a lot of guys running the Rotella on older flat tappet engines such as the Turbo Buicks. I run Mobile Conventional 10W40 and add a 12 oz bottle of the Lucas Engine Break In Additive for added Zinc content in mine. Of course it gets changed every 2 years regardless of mileage.

LUO-E01-_is
 
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