M1 EP vs AMSOIL signature

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Any opinions between these two? I would go 1yr/ 10k OCI. Mostly short trips with occasional long trips on the highway. NA subaru driven consevatively.
 
My last oil change in our 2010 Camaro SS went 13,504 miles on regular Mobil 1 using the OLM to 0%. I did change the filter at 50% and added approximately 1/2 quart. I sent in a sample when I changed the oil and it came back that the oil was still good. I currently have Mobil 1 EP 5w-30 and a Amsoil Ea15K50 oil filter. IMO, Amsoil would not benefit me since I am bound by the OLM while still under warranty and have proof in hand that regular Mobil 1 works just fine.

Mobil 1 EP 5w-30 and Amsoil Sig Series 5w-30 almost have identical amounts of Zinc and Phosphorus. IMO, where Amsoil shines is that it is a REAL 100% synthetic with loads of Calcium, Moly and Boron which gives it much better acid and oxidation fighting capabilities.
 
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Before you decide that either one can do 1 yr/ 10K, a little more information is in order.

When you say short trips, what do you mean? 1 mile to work, 5 miles to work, 10 milest to work? We have seen UOAs of some pretty stout oils where the TBN is exhausted after as little as 3000 miles with 1-2 mile trips to work and back.

Your best bet would be to follow Subaru's recommendation based on your driving habits and at the end of that period, have a UOA performed to determine if you can go longer.

Anyone who says you can go 10,000 miles or 1 year without knowing more about your driving pattern is not giving you reliable advice.
 
Cowboy: its 7 miles each way to work for me. My thinking was that occasional long trips (over an hou each way) should at least address fuel dilution.
 
Originally Posted By: joaks
Cowboy: its 7 miles each way to work for me. My thinking was that occasional long trips (over an hou each way) should at least address fuel dilution.

Amsoil. Mobil 1 makes enough money. Support an American. Amsoil is an American company. Mobil 1 may have an office here
 
Originally Posted By: OldCowboy
Before you decide that either one can do 1 yr/ 10K, a little more information is in order.

When you say short trips, what do you mean? 1 mile to work, 5 miles to work, 10 milest to work? We have seen UOAs of some pretty stout oils where the TBN is exhausted after as little as 3000 miles with 1-2 mile trips to work and back.

Your best bet would be to follow Subaru's recommendation based on your driving habits and at the end of that period, have a UOA performed to determine if you can go longer.

Anyone who says you can go 10,000 miles or 1 year without knowing more about your driving pattern is not giving you reliable advice.


+1. What vehicle do you have? Is it a turbo? All of these things play into whether an extended OCI is in order. Most likely you can do a 1 year OCI if you drive 10k but if it is 99% short trips with a few long trips it could be better to do 2 5k's. More info is needed. Also how many miles on the odo and what oil and intervals have you been running?

I see the vehicle in your sig now. That baby has some years on it!
 
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No turbo. The engine has about 15k on it (remanufactured). Right now using Valvoline synpower which I change at 4k roughly. 97 subaru legacy 2.2L.
 
Originally Posted By: joaks
No turbo. The engine has about 15k on it (remanufactured). Right now using Valvoline synpower which I change at 4k roughly. 97 subaru legacy 2.2L.



Thanks, with the reman engine I think you could do the 10k's. Both oils are great choices. I would say Amsoil is the better choice, If it were my engine and I was doing 1 year OCI's that is what I would want in it. Just an Opinion. Pennzoil Ultra could do it too. I don't like the new M1 EP Additive pack, I think the "regular" M1 5w30 dexos1 oil is just as good or better.
 
Originally Posted By: Clevy
Originally Posted By: joaks
Cowboy: its 7 miles each way to work for me. My thinking was that occasional long trips (over an hou each way) should at least address fuel dilution.

Amsoil. Mobil 1 makes enough money. Support an American. Amsoil is an American company. Mobil 1 may have an office here



Hmmmm

http://en.wikipedia.org/wiki/Mobil

Quote:
Mobil, previously known as the Socony-Vacuum Oil Company, was a major American oil company which merged with Exxon in 1999 to form ExxonMobil. Today Mobil continues as a major brand name within the combined company, as well as still being a gas station sometimes paired with their own store or On the Run. Its former headquarters in Fairfax County, Virginia, are currently used as ExxonMobil's downstream headquarters.


Quote:
Following the break-up of Standard Oil in 1911, the Standard Oil Company of New York, or Socony, was founded, along with 33 other successor companies. In 1920, the company registered the name "Mobiloil" as a trademark.


Quote:
From 1936 to 1968, Mobil sponsored an economy run each year (except during World War II) in which domestic automobiles of various manufacturers in several price and size classes were driven by light-footed drivers on cross-country runs. The Economy Run originated with the Gilmore Oil Company of California in 1936 (which was purchased by Socony-Vacuum in 1940) and later became the Mobilgas Economy Run and still later, the Mobil Economy Run. The cars driven in the economy run were fueled with Mobil gasoline and Mobiloil and lubricants were also used. The vehicles in each class that achieved the highest fuel economy numbers were awarded the coveted title as the Mobilgas Economy Run winner.
During US involvement in WW II, April 29, 1942, Socony's unescorted tanker, named Mobiloil, was sunk by a German U-boat (U-108 captained by Klaus Schlotz), and all 52 people survived after 86 hours adrift in lifeboats.


Quote:
Mobil moved its headquarters from New York to Fairfax County, Virginia in 1987.[5]
In 1998, Mobil and Exxon agreed on a merger to create ExxonMobil, which was completed on November 30, 1999. Lou Noto was Chairman of Mobil at the time of the merger and Walter Arnheim was treasurer.


Quote:
Exxon Mobil Corporation (NYSE: XOM) or ExxonMobil, is an American multinational oil and gas corporation. It is a direct descendant of John D. Rockefeller's Standard Oil company,[3] and was formed on November 30, 1999, by the merger of Exxon and Mobil. Its headquarters are in Irving, Texas. It is affiliated with Imperial Oil which operates in Canada.



Mobil is one of the oldest American oil companies, headquartered in the USA and yes, they happen to be the most profitable company of all time. However, they sir, are VERY American, and are much older and have much more US involvement than Amsoil.

So you might want to throw that argument right out the window and focus on why Amsoil is good, rather than why Mobil is "evil".
 
Originally Posted By: joaks
Cowboy: its 7 miles each way to work for me. My thinking was that occasional long trips (over an hou each way) should at least address fuel dilution.


In my estimation, 7 miles is a little on the short side. The occasional long trips may address fuel dilution, but not acid formation. If it were me, I'd run it for 5000 miles and then pull a UOA without draining it. Based on the UOA you can decide to either extend the OCI or change the oil.
 
Originally Posted By: OldCowboy
Originally Posted By: joaks
Cowboy: its 7 miles each way to work for me. My thinking was that occasional long trips (over an hou each way) should at least address fuel dilution.


In my estimation, 7 miles is a little on the short side. The occasional long trips may address fuel dilution, but not acid formation. If it were me, I'd run it for 5000 miles and then pull a UOA without draining it. Based on the UOA you can decide to either extend the OCI or change the oil.


Good info. I'd use Mobil 1 EP and see how it holds up.
 
I'd consider local availability when choosing an oil. I'm not a fan of spending time and effort to locate a boutique oil that may or may not be better in your application, when an "off the shelf" oil is right down the road.

If vatozone stocked amzzoil, I'd purchase it from them. But they don't. So, I determine what's best, from among what they or wallyworld sells.
 
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