Mobil 1 Extended Performance Oil.

stevet · 03-17-05, 01:52

I bought a 5 quart jug of this at Walmart for $23.00. I have been hearing about how this is much better than Mobil 1 regular synthetic. It's supposed to have more cleaners and additives and be good for 15000 miles. I did some research and talked to Mobil 1 customer support and was advised not to use this oil if my car is under warranty. It will void your warranty

I asked why their best oil will void my warranty and the Customer rep says because it's not an energy conserving oil

He recommended regular Mobil 1 synthetic even though it's not as good as the Extended performance.

This is the first I am hearing of this. There have been several threads in the last few months about this oil and I don't recall any mention of voiding your warranty using it.

tom p. · 03-17-05, 02:02

yeah, it may not meet several of the mfr's requirements. I'd listen to Mobil's suggestion and adhere to a recommended oil 'til you're out of warranty.

MS22 · 03-17-05, 02:16

Too much talk lately about Mobil1 messing around with a good thing, their old SuperSyn. For alot of info head over to bobistheoilguy.com and check out the forum. After spending some time there I decided against the Mobil for my last change (this past Sat) and bought some Redline 5w40. The Redline may still be on sale at Advance for $5.09 a quart (from $7.99).
I would think any manufacturer would scoff at the idea of honoring a warranty in which the oil was only changed every 15k. My VW says 5k for the first two changes and every 8k after that but it has never gone past 4k, ideal is between 3-3.5k.
If you take it back even look at the Castrol Syntec, or Quaker State fully synthetic.

Setec Astronomy · 03-17-05, 02:18

The newest Mobil 1 (regular) meets the API SM service class designation, the EP meets the older SL. Only the SM oils will be allowed to carry the energy-saving "starburst" certification after May 1. Since the SM oils have only come out recently (within the last couple months for Mobil 1), I'm not sure how you could have your warranty violated for using SL. On the other hand, I was looking in a 2005 GM owner's manual, and they no longer mention the service class, only that you should "use only those oils that...have the starburst symbol on the front of the oil container." Seems pretty gray to me.

BradE · 03-17-05, 02:25

The additives required for the longer service interval are too much to meet the energy conserving requirement, that's why it doesn't meet some manufacturer specs. The downside is some manufacturers are now calling for 10k, 15k and even some 20k change intervals on cars now and many standard oils simply won't go that far. I personally do not believe any synthetic oil should be run more than 7,500 miles without analysis. I just bought Mobil 1 Extended Performance 5w/30 yesterday and put it in the Town Car today; I plan on doing an oil analysis at 5k miles to see how it's doing.

As for the talk of Mobil messing up Mobil 1, don't believe it. I can't tell you how many times I've heard that same story "OMG, Mobil screwed Mobil 1". Mobil 1 is the most recognized synthetic oil in the world, and it's without a doubt one of the best oils on the market, Mobil isn't going to do anything to screw that up.

Mighty HD · 03-17-05, 02:39

You should still be able to get the super syn. I bought 10 cases of it (6 in each case) a few weeks ago.

Pep boys has buy 3 get 3 free. You can't beat it with a football bat..lol

There's no way I'm leaving any oil in any vehicle I own for 15,000. I paid nearly 40k for the truck...noooo sir. I'll stick with 2,000 mile changes. It usually takes 5 months to go that in the truck so I'm good. It's cheap insurance.

BradE · 03-17-05, 02:52

2k mile change intervals is wasting oil, especially with synthetic.

Bill D · 03-17-05, 03:02

Is there also a time "expiration date" independent of mileage when the oil would need to be changed? I use dino in the Caddy, which is driven infrequently and I might let a year,tops, go beofre changing the oil although I generally change it more often than that. How would this go for synthetic oil? A year tops with little miles before needing changing also?

jonkav · 03-17-05, 03:25

While this doesn't help with Mobil 1 specifically, visit Amsoil.com They are *the* synthetic oil producers, and have plenty of data to support their products.

All because it's not in the chain stores doesn't make it a bad product

or, even though it is in the chain stores doesn't make it a good product (and our detailing products are proof of that, no?)

Okiewan · 03-17-05, 03:56

Quote:

I just bought Mobil 1 Extended Performance 5w/30 yesterday and put it in the Town Car today; I plan on doing an oil analysis at 5k miles to see how it's doing.

What exactly is your testing proceedure?

Setec Astronomy · 03-17-05, 04:01

Bill, I was just reading someting on this at BITOG, where a comment was made about oil being underground for millions of years, it's not going to go bad in a few in your car or on your shelf, but quoting from that 2005 GM owner's manual, with the computer that determines the oil drain interval "It is possible that, if you are driving under the best conditions, the engine oil life system may not indicate that vehicle service is necessary for over a year. However, the engine oil and filter must be changed at least once a year..."

My opinion is that the specific improved properties of synthetic oils don't help you in your "storage" condition, and your drain interval needs to be the same to get the condensates out of the oil.

Bill D · 03-17-05, 04:05

Yeah, I was planning to continue to stick to the at least once a year regimen. Definitely can't have condensates in there for too long

Thanks