<TABLE cellSpacing=0 cellPadding=0 border=0><TBODY><TR><TD class=header vAlign=top>Check this out! I've seen a lot of hate on the plain Mobile1, but here is the extended performane. You can get a 5qt from walmart for $25. Any thoughts?

http://www.mobil1.com/USA-English/Mo..._Warranty.aspx

Mobil 1 Extended Performance
</TD></TR><TR><TD></TD></TR><TR><TD></TD></TR><TR><TD class=cnhdr-blue>Mobil 1 Extended Performance Motor Oil Limited 15,000 Mile or 1 Year Warranty</TD></TR><TR><TD></TD></TR><TR><TD class=bodyText>
This is a limited warranty covering the Mobil 1 Extended Performance lubricant you purchased. ExxonMobil warrants its lubricants to be free from defects and will replace any Mobil lubricant that is defective. ExxonMobil guarantees that the Mobil 1 Extended Performance lubricant you purchased will protect your vehicle’s critical engine parts from oil related failure for 15,000 miles or 1 year, which ever comes first. If not, provided the engine was serviceable at the time the oil was installed, ExxonMobil will have your vehicle repaired and replace the oil at no cost to you. Be advised that if your vehicle is covered by a warranty, you should follow the vehicle's oil life sensor or the oil change interval recommended in your owner's manual to avoid a disruption in your vehicle warranty. Follow your owner's manual if the vehicle is operated in any of the following severe services: racing or commercial applications including taxis, limousines, etc.; frequent towing or hauling; extremely dusty or dirty conditions; or under excessive idling conditions.

ExxonMobil Lubricants & Petroleum Specialties Company, a division of Exxon Mobil Corporation ("ExxonMobil") provides this limited warranty to the purchasers who use Mobil 1 Extended Performance lubricant in their vehicle.

This limited warranty covers the Mobil 1 Extended Performance lubricant and critical engine parts lubricated by the lubricant.

This limited warranty is valid for 15,000 miles or 1 year from the date [purchase or installation], whichever is earlier.

If there is equipment failure related to the Mobil brand lubricant you purchased, ExxonMobil will repair any equipment damage directly caused by a defect or malfunction of a Mobil lubricant, provided that the lubricant was selected and used in accordance with specifications of the original equipment manufacturer or the written instructions (which includes product packaging) of ExxonMobil.

To file a claim under this Limited Warranty, you must:

1. Upon discovery of the damage (but not later than six (6) months from the date the damage occurred) call 1-800-AskMobil.
2. Allow an ExxonMobil representative to examine the equipment and maintenance records, if available, and provide proof of purchase to determine the extent of the damage and to confirm that a Mobil lubricant was the cause.
3. Allow an ExxonMobil representative to obtain an oil sample from the engine for oil analysis at no cost to you to assist in determining the cause of the equipment failure.

This Limited Warranty excludes:
Mobil lubricants used in mechanically deficient equipment as a result of abnormal operation; negligence; abuse; damage from casualty, shipment or accident; or, equipment modification done without written authorization from the OEM.

Situations where the OEM required lubricant standards do not match those stated by ExxonMobil without written approval from ExxonMobil.

Mobil lubricants that have been used in conjunction with any other product or additive that has not been authorized for use by ExxonMobil.

Failure of equipment due to a pre-existing condition that is unrelated to the use of Mobil lubricants.

The remedy provided here will be your only recovery against ExxonMobil. You will not be able to recover incidental or consequential damages. Some states do not allow the exclusion of or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.

This warranty gives you specific legal rights, and you may also have other rights, which vary from state to state.</TD></TR></TBODY></TABLE>



http://www.mobil1.com/USA-English/Mo...rformance.aspx

 

Unfortunately the legal life of an engine is 100,000 miles so don't expect performance of Mobil's warranty beyond that.

Plus:
"Be advised that if your vehicle is covered by a warranty, you should follow the vehicle's oil life sensor or the oil change interval recommended in your owner's manual to avoid a disruption in your vehicle warranty. Follow your owner's manual if the vehicle is operated in any of the following severe services: racing or commercial applications including taxis, limousines, etc.; frequent towing or hauling; extremely dusty or dirty conditions; or under excessive idling conditions. "

So follow 7500 mile change interval up to 70k [Nissan expiration] then do what you want and rely on Mobil if you don't care what happens after 100k.

 

What do think of the oil itself?

 

I've been using Mobil Extended for 1.5 years now in my Maxima, so far so good. 12k between drains, one filter and 1/3qt in the middle, good as gold. On the G, can't say.

 

Every sludged up engine we replace: Lexus, Toyota, or Nissan was from failure to change oil frequently enough for the operating conditions............whether that was 3,750, 5,000, or 7500 miles or 90 days, 120 days or 6 months.

 

It's very good oil but no way would I go 15k between changes with any oil.

I'm sure the oil can hold up that long but it still gets dirty and I have seen bigger oil filters on a lawn tractor than the one on my G. I am very sceptical that that little thing can effectivly remove contaminants for 15k

 

I thought it was not advisable to run the filters at 15K even if you do the oil that long.
(So now you are thinking if I change the filter at 5 to 7.5K and add a qt of oil..oh hell, I might as well change the oil too!)

 

My cousin went drove about 25k with his 04 automatic G35 on regular oil and nothing happened to the car. This 15k warranty can be given with any oil even non-synthetic. Any type of oil should be changed before 5k to extend the life of ur engine.

 

"Mobil 1 Extended Performance Oil Filters are designed to offer excellent efficiency (remove more engine oil impurities) and high capacity (60 percent greater capacity than conventional oil filters), which make them ideal candidates for longer oil change intervals. "

http://www.mobil1.com/USA-English/Mo...AQs.aspx#FAQs1

 

I use it most of the time but still change way more often. My car makes way too much heat to expect any oil to last that long

 

Not a bad oil but also not the best either