I would like to know your opinion on this.

Now Mobil1 comes in 4 different flavors. This is a summary of their specifications for 5w30 viscosity:

• Mobil1 Extended Performance
  5W30 (GMdexos1, GM4718M)
• Mobil1
  5W30 (GMdexos1, GM4718M)
• Mobil1 Advanced Fuel Economy
  0W30 (GM4718M)
• Mobil1 High Mileage
  5W30 (No GM recommendations)

The last one is supposed to benefit engines above 75k by having seal conditioners, extra cleaning agents, etc., but it doesn't meet GM4718M, so let's "eliminate" it.

Any one of the other 3 should be fine, according to their specifications. In Walmart the Extended Performance is more expensive than the other 2 and these, in turn, cost the same.

The Extended Performance is said to last for 15k or 1 year. If we go by price, and you don't drive more than 15k in a year, it makes no sense to buy it.

So my question is, in your opinion, having both "Mobil1 5W30" and "Mobil1 Advanced Fuel Economy 0W30" in front of you, side by side, in the store shelves and at the same price, which one would you buy?

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I'm copying here Post #21, which is a direct result of this exchange of information, to facilitate the process of getting up to speed with this thread.

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Post #21:

I read all these good points with great interest. Contrary to what one can intuitively expect, the only oil from the group that doesn't meet GM's recommendations seems to have the edge here, while the one that's supposed to provide better protection when cold starting an engine appears to be at a disadvantage.

Wanting to find more info on this subject, I went to "Bob Is The Oil Guy" website and found an interesting paper by Dr. Ali E. Haas (AE Haas): Motor Oil University. It is divided in chapters, each touching a different aspect, to facilitate reading.

To my surprise, Chapter #7: Motor Oil 107 (bottom of the page) doesn't agree with the ZDDP concerns expressed above:
The conclusions in Chapter #10: Motor Oil 201 (bottom of the page), which are well presented and supported along the document, do not agree either with what seems to be the general consensus here. According to this paper, the most appropriate oil (from this group of 4 oils) for our application would be Mobil1 Advanced Fuel Economy 0W30:
What do you guys think?

 

I have always used option number 2 - fully synthetic 5W30 Mobil 1. Has worked very well so far so that would be the one I would go with.

 

I've always used #2, may look at #1 next change

 

I'm with the #2 crowd.

 

Another one for #2 here.

OBD

 

I'm going to start a free for all here. What about the Mobil One 15,000 mile oil? My 2003 uses not a drop of oil between changes. What do you all think about putting the high milage oil and just changing filters every 3,000 miles? Mobil One puts their name on it. We are talkin' everyday driving. Not tracking, not parking it for the winter, just driving. What do you think?

 

extended performance is bound to have more additives. unless you like pushing past 5k miles i can't imagine much of a benefit

the 0-30 is thin which is where the fuel mileage comes from. really thin oils scare me in performance applications. yes they are worth a couple hp but cam scaring and piston ring wear also are more likely with thinner oils

so, i guess that puts me with option #2 as well

unless you spend 2x as much on amsoil, royal purple or redline i haven't seen anything in wear tests over at bob is the oil guy concerning valvoline syn, castrol syn, penzoil platinum or mobil1 to make me favor one more than the other. personally i buy the cheapest of those 4 whenever i walk into walmart. prices, at least here tend to change weekly. i will admit that castrol is my least favorite of the 4 and i have no real idea why

 

you know what gets me about these "15,000" mile oils and the like. here it is

a diesel or highway geared v8 gas engine cruises about 1500rpm

a high winding performance 4 cylinder like the honda type r cruises 3500-4000rpm

the honda has between 2 and 3 times the amount of piston travel in a typical 3000 mile drive. high rpms also tend to allow more blow by of combustion gases into the crankcase.

so, how can an oil that goes say 5000 miles even in example number 1 claim to do the same in example number 2

 

Option 5 - Pennzoil Platinum 5w30

 

Amsoil

 

The two first one meets gm standard because they got a max of 800 ppm of additive(zinc,phosphorus zddp).Gm ask for low number of additive because they could hurt the catalytic converter before there life service wich mean changing them under warranty.

The best of all the above is the high milleage one.This is the exact same oil like the dexos 5w30 but with a way better additive package(zinc 1100 ppm, phorphorus 1000 ppm ).Zinc.phosphorus and zddp protect the cam,rocker etc.

 

100% right, and the 0w-30 has even less ZDDP than all the other 5w-30s. Thats why i add Red Lines engine break-in Additive, one once per quart of oil raises ZDDP about 600 ppm.

http://69.89.75.22/product.aspx?pid=121&pcid=1

 

good info !

 

I do the exact same thing with the exact same product since i cant find some high mileage one easily here.I add 4 oz or RL additive for each oil change with M1 5W30 to bring my phosphorus to 1100ppm .I do this to complete my break in properly.And yeah im using M1 for break in since its a common Group 3 synthetic oils wich is not wildly different from conventional oil and wont affect any further break in.
Then i ll switch to some full synthec RL 0w30 wich is ester based oils.I choose the 0w30 because there 5w30 is thicker than a normal 5w30 grade and thicker is not always better.Are engine require good oil flow and less restriction.

M1 5W-30 has nominally 800 ppm of phosphorus.
To increase 7 litres to 1,000 ppm will take 2.5 oz of RL Break-In Additive.
1,100 ppm will take 4 oz.
1,200 ppm will take 5.25 oz.
1,300 ppm will take 6.5 oz.

How high a P level you want is up to you but I wouldn't go higher than 1,300 ppm. Personally I think 1,000 ppm is fine.

 

Personally i use Mobil 0-40. Great all around oil. If i remember correctly, it is the recommended oil for vettes in europe

 

I use #1, but in the 10W30 flavor because I live in Texas. Owner's manual calls for this oil in warmer climates where temps don't drop below 20 degrees in winter.

 

 

I am in the option #2 camp.

 

 

I go with option #2 also.