Which Mobil 1 ???
Thread Starter
Le Mans Master
Joined: Dec 2012
Posts: 7,750
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2015 C6 of the Year Finalist
Which Mobil 1 ???
I'm assuming that most of you use Mobil 1 oil. I can't help wondering which of the numerous iterations of Mobil 1, do most folks use?
Does the "Extended Performance" for instance, really extend the useful life of the oil, or is it just a gimmick?
If you change your own oil, which do you buy?
If you have the oil changed for you, which does your dealer/service center use? Do you request they use a specific variety of Mobil 1?
Thanks for your responses.
I should have done a search before starting this thread. I see now it's been done to death. If there's a Mod available, feel free to remove it...thanks
Does the "Extended Performance" for instance, really extend the useful life of the oil, or is it just a gimmick?
If you change your own oil, which do you buy?
If you have the oil changed for you, which does your dealer/service center use? Do you request they use a specific variety of Mobil 1?
Thanks for your responses.
I should have done a search before starting this thread. I see now it's been done to death. If there's a Mod available, feel free to remove it...thanks
Last edited by Hameister; Feb 8, 2013 at 11:24 AM.
Le Mans Master
Joined: Jun 2011
Posts: 8,049
Likes: 330
From: Charlotte NC
St. Jude Donor '14-'15
I use Mobil1 in all of my vehicles, the Vette and Z28 get 5W30 extended performance. The z28 has 315,000 miles on it and I change the oil every 10,000 miles. Works for me. 
Others will have different opinions but........ 
Others will have different opinions but........
Melting Slicks
Joined: Oct 2004
Posts: 2,863
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From: Woodland CA
Burning Brakes
Joined: May 2007
Posts: 965
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From: turn 12 at Road America or TX
Starting in 2011, GM specified dexos1 oil which is a syn-blend - my 2013 C6 owner's manual only mentions dexos1, so that's what I'll use during the warranty period. And pay attention to the oil life monitor ...
Thread Starter
Le Mans Master
Joined: Dec 2012
Posts: 7,750
Likes: 172
2015 C6 of the Year Finalist
Thanks everyone!
It seems a few years ago there was some concern because the M1 "Extended Performance", was not GM approved, but it is now, so I guess there are no issues.
It seems a few years ago there was some concern because the M1 "Extended Performance", was not GM approved, but it is now, so I guess there are no issues.
Burning Brakes
Joined: Aug 2011
Posts: 967
Likes: 1
just becareful using the extended if you are using a fast ramp cam
it will last a little longer that the original mobil1
either one is fine, but if you like the lighter/clearer brownish color then extended is for you
i've used both before, and no problems with either
how ever the original mobil1 i believe is cheaper
it will last a little longer that the original mobil1
either one is fine, but if you like the lighter/clearer brownish color then extended is for you
i've used both before, and no problems with either
how ever the original mobil1 i believe is cheaper
Melting Slicks
Joined: Dec 2006
Posts: 2,694
Likes: 106
I was also wondering about differences between M1 5/30 and M1 EP 5/30. Changed the oil recently at 3K miles, and went with the regular one. If oil is going to be changed at 5K miles, which is actually better, if at all? For $2 extra per 5-qts, the EP is basically the same as the other. But I'd like to know if I'd be getting any better additive package, even though I wouldn't push the mileage envelope. Remember reading something about the EP having less desirable additives in order to make it last longer. Doesn't make much sense, but hopefully somebody will chime in with the actual differences. I was hoping EP was a group IV oil (100% synthetic, which regular M1 is not, due to dino base stock), but reportedly it's not. So don't really know the difference. Until I know, will use the regular stuff 
.
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Le Mans Master
Joined: Jun 2011
Posts: 8,049
Likes: 330
From: Charlotte NC
St. Jude Donor '14-'15
I was also wondering about differences between M1 5/30 and M1 EP 5/30. Changed the oil recently at 3K miles, and went with the regular one. If oil is going to be changed at 5K miles, which is actually better, if at all? For $2 extra per 5-qts, the EP is basically the same as the other. But I'd like to know if I'd be getting any better additive package, even though I wouldn't push the mileage envelope. Remember reading something about the EP having less desirable additives in order to make it last longer. Doesn't make much sense, but hopefully somebody will chime in with the actual differences. I was hoping EP was a group IV oil (100% synthetic, which regular M1 is not, due to dino base stock), but reportedly it's not. So don't really know the difference. Until I know, will use the regular stuff .
.
Melting Slicks
Joined: Dec 2006
Posts: 2,694
Likes: 106
. And that takes me a year. I'll continue using M1 or M1 EP; the question was which one of them . Difference is about $5 for my dry-sump's 10.5-qt capacity.
Melting Slicks
Joined: Apr 2007
Posts: 2,987
Likes: 16
From: Phoenix
More zinc and phosphorous is better because it cushions bearings and rockers better.
According to this Mobil 1 spec sheet, the EP and regular 5-30 have the same zinc and phosphorous levels. It also only says they are both GM Dexos approved. Although for some reason the regular 5-30 says Corvette approved in addition to Dexos. If you out of warranty I would be tempted to run the 0W-30 racing oil for the extra zinc and phosphorous. 1850ppm for the racing oil vs 900ppm for the normal stuff.
http://www.mobiloil.com/USA-English/...duct_Guide.pdf
Read this about what zinc/ZDDP/phosphorous levels do for you
http://www.valvoline.com/faqs/motor-oil/racing-oil/
According to this Mobil 1 spec sheet, the EP and regular 5-30 have the same zinc and phosphorous levels. It also only says they are both GM Dexos approved. Although for some reason the regular 5-30 says Corvette approved in addition to Dexos. If you out of warranty I would be tempted to run the 0W-30 racing oil for the extra zinc and phosphorous. 1850ppm for the racing oil vs 900ppm for the normal stuff.
http://www.mobiloil.com/USA-English/...duct_Guide.pdf
Read this about what zinc/ZDDP/phosphorous levels do for you
http://www.valvoline.com/faqs/motor-oil/racing-oil/
Last edited by jon6.0; Feb 9, 2013 at 03:22 PM.